McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 251. |
Eyes of potato are useful for - |
| A. | Nutrition |
| B. | Respiration |
| C. | Reproduction |
| D. | Vegetative propagation |
| Answer» D. Vegetative propagation | |
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Explanation: Any potato variety can be propagated vegetatively by planting tubers, pieces of tubers, cut to include at least one or two eyes, or also by cuttings, a practice used in greenhouses for the production of healthy seed tubers. Some commercial potato varieties do not produce seeds at all (they bear imperfect flowed long (4.5 to 9 is usually a whopping 15 to 30 feet meters) and lives in the small intestine. An infected person usually has only one or two worms. The tapeworms use their head, called the scolex, to attach themselves to the intestinal |
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| 252. |
In which part of the eye lies the pigment that decides the colour of the eyes of a person’? |
| A. | Corea |
| B. | Choroid |
| C. | Iris |
| D. | Vitreous body |
| Answer» C. Iris | |
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Explanation: The iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina. "Eye color" is the color of the iris, which in humans can be green, blue, or brown. In some cases it can be hazel (a combination of light brown, green and gold), grey, violet, or even pink. In response to the amount of light entering the eye, muscles attached to the iris expand or contract the aperture at the center of the iris, known as the pupil. The larger the pupil, the more light can enter, |
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| 253. |
Which of the following food items is rich in iron? |
| A. | Rice |
| B. | Apple |
| C. | Pulses |
| D. | Orange |
| Answer» B. Apple | |
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Explanation: Apples are a great, healthy food, but even with the skin they do not contain a large amount of iron. Apples contain 11 milligrams of iron per 100 grams. A gram is a measure of weight. Fruit as a food group is not a great iron source but it does play an important role in ourability to absorb iron. Fruit is often loaded with vitamin C, a vitamin that will actually help to utilize the iron in vegetarian foods; apples are a modest source of vitamin C. |
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| 254. |
Who discovered Cholera germs? |
| A. | Robert Koch |
| B. | Rene Laennec |
| C. | Dreser |
| D. | Hansen |
| Answer» A. Robert Koch | |
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Explanation: In 1883, Koch worked with a French research team in Alexandria, Egypt, studying cholera. Koch identified the vibrio bacterium that caused cholera. |
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| 255. |
What is the limit of MG/DL, of blood sugar in the normal person at the time of fast? |
| A. | 40-60 |
| B. | 120-150 |
| C. | 70-100 |
| D. | 160-200 |
| Answer» C. 70-100 | |
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Explanation: The mean normal blood glucose level in humans is about 4 mM (4 mmol/L, or 72 mg/dL, i.e. milligrams/deciliter); however, this level fluctuates throughout the day. Glucose levels are usually lowest in the morning, before the first meal of the day (termed "the fasting level"), and rise after meals for an hour or two by a few millimolar. |
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| 256. |
The cross-section of a stem of tree has fifty rings, what is the age of the tree? |
| A. | 50 months |
| B. | 5 years |
| C. | 25 years |
| D. | 50 years |
| Answer» D. 50 years | |
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Explanation: Dendrochronology or tree-ring dating is the scientific method of dating based on the analysis of patterns of tree rings, also known as growth rings. Dendrochronology can date the time at which tree rings were formed, in manytypes of wood, to the exact calendar year. Growth rings are the result of new growth in the vascular cambium, a layer of cells near the bark that is classified as a lateral meristem. |
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| 257. |
Onion is a modified form of – |
| A. | leaf |
| B. | stern |
| C. | root |
| D. | None of these |
| Answer» B. stern | |
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Explanation: An onion has a modified form of stem called a bulb, or more specifically a tunicate bulb. In this type of modified stems, the stem is enclosed by a covering of leaves and it is underground. The bulb contains a few outside layers that are dry and membranous that encircles the bulb, which is where tunicate comes from. Nutrients for the plant are stored within the bulb. |
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| 258. |
The pollination of maize takes place by |
| A. | self-pollination |
| B. | pollination by insects |
| C. | pollination by air |
| D. | pollination by rain |
| Answer» C. pollination by air | |
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Explanation: Maize (called corn in some parts of the world) is pollinated by air. The male anthers let go of their pollen and it blows over to a nearby female flower on another corn plant. Most of the flowers are either male or female on a corn, rather than both sexes in one flower. Maize flowers have evolved to use air for pollination. |
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| 259. |
Sweetex used by the diabetic patients has energy content of : |
| A. | Five calories |
| B. | Ten calories |
| C. | Hundred calories |
| D. | Zero calories |
| Answer» D. Zero calories | |
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Explanation: Low-calorie sweeteners are sugar substitutes that have zero calories and do not raise blood glucose levels through eating them, which makes them a preferable choice for diabetic people over sugar. |
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| 260. |
The element which is the most abundant in the human body is : |
| A. | Oxygen |
| B. | Carbon |
| C. | Iron |
| D. | Nitrogen |
| Answer» A. Oxygen | |
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Explanation: The generation and maintenance of all our life processes are supported by four basic components: carbohydrates, water, proteins and energy. Most scientists agree that oxygen is actually the over-riding key ingredient in all four of these life components. 80% of all our metabolic energy production is created by oxygen! The human body is largely composed of oxygen. All metabolic processes in the body are regulated by oxygen. |
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| 261. |
Animals do not have enzyme systems which enable them to make use of the energy from - |
| A. | fat |
| B. | water |
| C. | protein |
| D. | carbohydrate |
| Answer» A. fat | |
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Explanation: Although fat is a common way of storing energy. In vertebrates such as humans the fatty acids in these stores cannot be conberted to glucose through gluconeogenesis as these organisms cannot convert acetyl CoA in to pyruvate plants do. |
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| 262. |
Who discovered sex hormones? |
| A. | Dreser |
| B. | Eugen Steinach |
| C. | Edward Calvin |
| D. | Samuel Cohen |
| Answer» B. Eugen Steinach | |
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Explanation: Eugen Steinach discovered the sex hormones in 1921. He conducted experiments in the transplantation of a male guinea pig's testes into a female and the castration of the male. The testes secretion, now known as testosterone, resulted in the female guinea pig developing male sexual behavior such as mounting the partner. This led Steinach to theorize that the gland's secretions were responsible for sexuality. |
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| 263. |
Fermentation is a process of decomposition of an organic compound by |
| A. | catalysts |
| B. | enzymes |
| C. | carbanions |
| D. | free radicals |
| Answer» B. enzymes | |
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Explanation: Fermentation in food processing typically is the conversion of carbohydrates to alcohols and carbon dioxide or organic acids using yeasts, bacteria, or a combination there of, under anaerobic conditions. Fermentation in simple terms is the chemical conversion of sugars into ethanol. Both alcoholic fermentation and glycolysis are anaerobic fermentation processes that begin with the sugar glucose. Glycolysis requires 11 enzymes which degrade glucose to lactic acid. Alcoholic fermentation follows the same enzymatic pathway for the first 10 steps. |
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| 264. |
The branch of agriculture which deals with the feeding, shelter, health and breeding of the domestic animals is called - |
| A. | Dairy Science |
| B. | Veterinary Science |
| C. | Poultry |
| D. | Animal Husbandry |
| Answer» B. Veterinary Science | |
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Explanation: Veterinary medicine is widely practiced, both with and without professional supervision. Professional care is most often led by a veterinary physician (also known as a vet, veterinary surgeon or veterinarian), but also byparaveterinary workers such as veterinary nurses or technicians. This can be augmented by other paraprofessionals with specific specialism such as animal physiotherapy or dentistry, and species relevant roles such as farriers. |
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| 265. |
Edward Jenner is associated with - |
| A. | Cholera |
| B. | Typhoid |
| C. | Small Pox |
| D. | Paralysis |
| Answer» C. Small Pox | |
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Explanation: Edward Anthony Jenner, (17 May, 1749 - 26 January, 1823) was an English physician and scientist from Berkeley, Gloucestershire, who was the pioneer of smallpox vaccine. He is often called "the father of immunology", and his work is said to have "saved more lives than the work of any other man". Jenner contributed papers on angina pectoris, ophthalmia, and cardiac valvular disease and commented on cowpox. |
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| 266. |
Carbohydrate is stored in the body as |
| A. | glucose |
| B. | starch |
| C. | glycogen |
| D. | sucrose |
| Answer» C. glycogen | |
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Explanation: Glycogen is a multibranched polysaccharide that serves as a form of energy storage in animals and fungi. In humans, glycogen is made and stored primarily in the cells of the liver and the muscles, and functions as the secondary long-term energy storage (with the primary energy stores being fats held in adipose tissue). Glycogen is the analogue of starch, a glucose polymer in plants, and is sometimes referred to as animal starch, having a similar structure to amylopectin but more extensively branched and compact than starch. Polysaccharide represents the main storage form of glucose in the body. |
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| 267. |
Which one of the following substances is used for preservation of food grains? |
| A. | Sodium benzoate |
| B. | Vinegar |
| C. | Sodium chloride |
| D. | Potassium permanganate |
| Answer» A. Sodium benzoate | |
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Explanation: Sodium benzoate is used for the preservation of food. It has the chemical formula NaC6H5CO2. It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid. It is bacteriostatic and ftmgistatic under acidic conditions. |
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| 268. |
Which of the following animals has the longest life span? |
| A. | Elephant |
| B. | Crocodile |
| C. | Dog |
| D. | Tortoise |
| Answer» D. Tortoise | |
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Explanation: Tortoises generally have lifespans comparable with those of human beings, and some individuals are known to have lived longer thaw. 150 years. Because of this, they symbolize longevity in some cultures, such as China. The oldest tortoise ever recorded, and one of the oldest. individual animals ever recorded, was MI Malila, which was presented to the Tongan royal family by the British explorer Captain Cook shortly after its birth in 1777. |
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| 269. |
Which animal produces the biggest baby? |
| A. | Camel |
| B. | Lion |
| C. | Elephant |
| D. | Blue Whale |
| Answer» D. Blue Whale | |
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Explanation: Births in elephants tend to take place during the rains. Calves are born 85 cm (33 in) tall and weigh around 120 kg (260 lb). The sperm whale produces the largest baby that weighs about 1 ton at birth. The newborn can instinctively swim for the first 10 seconds with help from its mother and swim alone within 30 minutes after birth. When baby blue whales arefirst born, they weigh over 3,000 kg (3 tones), about the same weight as a. fully grown hippopotamus. Once born, a baby blue whale takes two years to reach a weight. of 26,000 kg (26 tones). No other living creature grows so quickly. |
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| 270. |
Which of the following is effective against tuberculosis? |
| A. | Penicillin |
| B. | Chloromycetin |
| C. | Terramycin |
| D. | Streptomycin |
| Answer» D. Streptomycin | |
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Explanation: Streptomycin is an antibiotic drug, the first of a class of drugs called amino glycosides to be discovered, and it was the first antibiotic remedy for tuberculosis. It is derived from the actinobacterium Streptomyces griseus. Streptomycin is a bactericidal antibiotic. Streptomycin cannot be given orally, but must be administered by regular intramuscular injections. |
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| 271. |
Which one of the following can be synthesized by Liver - |
| A. | Vitamin -—A |
| B. | Vitamin — E |
| C. | Vitamin — B |
| D. | Vitamin - K |
| Answer» D. Vitamin - K | |
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Explanation: Vitamin Kis a group of structurally similar, fat-soluble vitamins that are needed for the posttranslational modification of certain proteins required for blood coagulation and in metabolic pathways in bone and other tissue. This group of vitamins includes two natural vitamers: vitamin K1 and vitamin K2. Populations with an increased prevalence of vitamin K deficiency include those who suffer from liver damage or disease (e.g. alcoholics), cystic fibrosis, or inflammatory bowel diseases, or have recently had abdominal surgeries. |
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| 272. |
Which one of the following is not a true fish? |
| A. | Silver fish |
| B. | Saw fish |
| C. | Hammer fish |
| D. | Sucker fish |
| Answer» A. Silver fish | |
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Explanation: Lepisma saccharina, frequently called a silverfish or fish moth is a small, wingless insect in the order Thysanura. Silverfish are always wingless and are 'silvery to brown in colour because their bodies are covered with fine scales. They are generally soft bodied. Its common name derives from the animal's silvery light grey and blue colour, combined with the fish-like appearance of its movements, while the scientific name indicates the silverfish's diet of carbohydrates such as sugar or starches. |
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| 273. |
Johann Gregor Mendel is famous for propounding - |
| A. | Theory of mutation |
| B. | Laws of heredity |
| C. | Cell theory |
| D. | Theory of acquired characters |
| Answer» B. Laws of heredity | |
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Explanation: The Laws of Heredity are few; their implications for life are vast. The simplest genetic characteristics are those whose presence depends on the genotype at a single locus; i.e., one gene controls the expression of one characteristic. Such characters are known as Mendelian, after their original discoverer, the Austrian botanist Gregor Mendel. Over 10,000 Mendelian characters have been identified in humans. Mendelian laws of inheritance are statements about the way certain characteristics are transmitted from one generation to another in an organism. |
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| 274. |
Yellow Fever is transmitted by - |
| A. | Aedes |
| B. | Anopheles |
| C. | House-fly |
| D. | Culex |
| Answer» A. Aedes | |
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Explanation: Yellow fever (also known as Yellow Jack and Bronze John) is an acute viral hemorrhagic disease. The virus is a 40 to 50 rim enveloped RNA virus with positive sense of the Flaviviridae family. The yellow fever virus is transmitted by the bite of female mosquitoes (the yellow fever mosquito, Aeries aegypti, and other species) and is found in tropical and subtropical areas in South America and Africa, but not in Asia. The only known hosts of the virus are primates and several species of mosquito. |
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| 275. |
Washing of peeled vegetables removes the vitamin - |
| A. | A |
| B. | C |
| C. | D |
| D. | E |
| Answer» B. C | |
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Explanation: B-complex vitamins and vitamin C are water-soluble vitamins that are not stored in the body and must be replaced each day. These vitamins are easily destroyed or washed out during food storage and preparation. Fat- soluble vitamins—vitamins A, D, E and K dissolve in fat before they are absorbed in the blood stream to carry out their functions. Excesses of these vitamins are stored in the liver. |
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| 276. |
For the aquatic organisms, the source of food is – |
| A. | Phytoplankton |
| B. | Sea Weed |
| C. | Aqua plankton |
| D. | Zooplankton |
| Answer» D. Zooplankton | |
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Explanation: Zooplankton are a type of heterotrophic plankton that range from microscopic organisms to large species, such as jellyfish. |
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| 277. |
'Crabs' belongs to the phylum of – |
| A. | Mollusca |
| B. | Cnidaria |
| C. | Arthropoda |
| D. | Platyhelminthes |
| Answer» C. Arthropoda | |
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Explanation: Crabs come from the same family as lobsters, crayfish, shrimp, krill and barnacles, as all are in the subphylum crustacea. They are also in the phylum Arthropoda. |
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| 278. |
A medicine which promotes the secretion of urine is called – |
| A. | Adrenaline |
| B. | Monouretic |
| C. | Diuretic |
| D. | Triuretic |
| Answer» C. Diuretic | |
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Explanation: A diuretic provides a .means of forced diuresis which elevates the rate of urination. In medicine, diuretics are used to treat heart failure, liver cirrhosis, hypertension and certain kidney diseases. Some diuretics, such as acetazolamide, help to make the urine more alkaline and are helpful in increasing excretion of substances such as aspirin in cases of overdose or poisoning. Diuretics are often abused by sufferers of eating disorders, especially bulimics, in attempts at weight loss. |
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| 279. |
The chemicals released by one species of animals in order to attract the other members of the same species are - |
| A. | Hormones |
| B. | Nucleic acids |
| C. | Pheromones |
| D. | Steroids |
| Answer» C. Pheromones | |
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Explanation: A pheromone is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting outside the body of-the secreting individual to impact the behavior of the receiving individual. There are alarm pheromones, food trail pheromones, sex pheromones, and many others that affect behavior or physiology. Their use among insects has been particularly well documented. |
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| 280. |
Who propounded the theory of natural selection? |
| A. | Mendal |
| B. | Lamark |
| C. | Darwin |
| D. | De Vries |
| Answer» C. Darwin | |
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Explanation: Natural selection is Darwin's most famous theory that was formulated in 1859. |
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| 281. |
Rabies is a – |
| A. | Helminthic disease |
| B. | Viral disease |
| C. | Bacterial disease |
| D. | Protozoan disease |
| Answer» B. Viral disease | |
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Explanation: Rabies is a viral disease that causes inflammation of the brain in humans and other mammals. |
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| 282. |
Which one of the following symptoms of nutritional deficiency disorders is specific to Vitamin C deficiency? |
| A. | Cracks on lips |
| B. | Spongy bleeding gums |
| C. | Pale conjunctivae |
| D. | Rashes on skin |
| Answer» C. Pale conjunctivae | |
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Explanation: Paleness, also known as pale complexion or pallor, is an unusual lightness of skin color compared with your normal complexion. |
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| 283. |
Which organ has finger like outgrowths which are called as Villi (Singular Villus)? |
| A. | Large Intestine |
| B. | Bladder |
| C. | Small Intestine |
| D. | Stomach |
| Answer» C. Small Intestine | |
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Explanation: The inner walls of the small intestine have thousands of finger-like outgrowths called villi (singular villus). The villi increase the absorption of the digested food. |
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| 284. |
Viruses are – |
| A. | Cellular |
| B. | Acellular |
| C. | Unicellular |
| D. | Multicellular |
| Answer» B. Acellular | |
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Explanation: Although they may seem to behave as living things, viruses are actually acellular, nonliving particles. |
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| 285. |
Brain of a normal human adult weighs about - |
| A. | 1 lb |
| B. | 2 lb |
| C. | 3 lb |
| D. | 4 lb |
| Answer» C. 3 lb | |
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Explanation: The adult human brain weighs about 3 pounds (1,300-1,400 g). The adult human brain is about 2% of the total body weight. |
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| 286. |
Number of Eyes in an Earthworm is – |
| A. | one |
| B. | two |
| C. | many |
| D. | no eyes |
| Answer» D. no eyes | |
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Explanation: Earthworms have no eyes, but they do have light receptors and can tell when they are in the dark, or in the light. |
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| 287. |
Accupuncture is - |
| A. | a disease of heart |
| B. | servicing of tubes and tyres |
| C. | a treatment method with needles |
| D. | a crop culture |
| Answer» C. a treatment method with needles | |
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Explanation: Acupuncture is an alternative medicine methodololv originating in ancient China that treats patients by manipulating thin, solid needles that have been inserted into acupuncture points in the skin. According to Traditional Chinese medicine, stimulating these points can correct imbalances in the flow of qi through channels known as meridians. |
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| 288. |
The presence of air cavities is an adaptation of - |
| A. | Desert plants |
| B. | Trees |
| C. | Water plants |
| D. | Mesophytes |
| Answer» C. Water plants | |
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Explanation: Totally submerged plants are the true water plants or hydrophytes. Because they are truly aquatic they have the greatest number of adaptations to life in water. Air-filled cavities often extend throughout the leaves and stems of aquatic plants, providing an internal atmosphere. |
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| 289. |
The vitamin necessary for coagulation of blood is - |
| A. | vitamin B |
| B. | vitamin C |
| C. | vitamin K |
| D. | vitamin E |
| Answer» C. vitamin K | |
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Explanation: Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation (K from Koagulation, German for "coagulation"). |
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| 290. |
Ringworm is a disease caused by |
| A. | Fungi |
| B. | Bacteria |
| C. | Virus |
| D. | Flies |
| Answer» A. Fungi | |
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Explanation: Ringworm, also known as dermatophytosis or tinea, is a fungal infection of the skin or scalp. |
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| 291. |
Which of the following instrument is used to measure the blood-pressure? |
| A. | Thermometer |
| B. | ECG |
| C. | Sphygmomanometer |
| D. | Stethoscope |
| Answer» C. Sphygmomanometer | |
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Explanation: Sphygmomanometer is an instrument for measuring blood pressure. |
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| 292. |
In which of the following class can we put Adrenaline? |
| A. | Hormone |
| B. | Enzyme |
| C. | Protein |
| D. | Fat |
| Answer» A. Hormone | |
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Explanation: Epinephrine, also known as adrenaline, is a hormone. It is normally produced by both the adrenal glands and certain neurons. |
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| 293. |
The anti-malarial drug quinine is made from a plant. The plant is |
| A. | Neem |
| B. | Eucalyptus |
| C. | Cinnamon |
| D. | Cinchona |
| Answer» D. Cinchona | |
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Explanation: Quinine is an alkaloid, a naturally occurring chemical compound. How it works as a medicine is not entirely clear. Quinine was first isolated in 1820 from the bark of a cinchona tree. |
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| 294. |
Tuberculosis is transmitted through – |
| A. | Droplet transmission |
| B. | Blood transfusion |
| C. | Contaminated water |
| D. | Sexual contact |
| Answer» A. Droplet transmission | |
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Explanation: The bacteria get released into the air by someone who already has the TB bacteria in their body. |
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| 295. |
Which of the following is the largest living bird? |
| A. | Eagle |
| B. | Peacock |
| C. | Ostrich |
| D. | Kiwi |
| Answer» C. Ostrich | |
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Explanation: Ostriches are the largest living species of bird. Ostriches usually weigh 200 to 285 pounds, although some male ostriches have been recorded with weights of up to 340 pounds |
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| 296. |
Which cell organelle is called the Master of the Cell? |
| A. | Endoplasmic reticulum |
| B. | Mitochondria |
| C. | Nucleolus |
| D. | Nucleus |
| Answer» D. Nucleus | |
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Explanation: The nucleus is often called the control center; master the brain of the cell. |
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| 297. |
Generally insects respire through – |
| A. | Skin |
| B. | Gill |
| C. | Lung |
| D. | Spiracle |
| Answer» D. Spiracle | |
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Explanation: The function of spiracles is linked to respiration, helping oxygen to reach internal respiratory organs, such as lungs in whales and tracheae in insects. |
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| 298. |
Which of the following foodcrops has the maximum content of proteins? |
| A. | Cassava |
| B. | Soyabean |
| C. | Wheat |
| D. | Maize |
| Answer» B. Soyabean | |
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Explanation: Soybean is a significant and cheap source of protein for animal feeds and many prepackaged meals. Soybeans produce significantly more protein per acre than most other uses of land. The beans contain significant amounts of phytic acid, alpha-linolenic acid, and isoflavones. Together, soybean oil and protein content account for about 60% of thy soybeans by weight (protein at 40% and oil at 20%). The remainder consists of 35% carbohydrate and about 5% ash. |
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| 299. |
Where did the new form of pneumonia “SARS” start? |
| A. | Canada |
| B. | Singapore |
| C. | China |
| D. | Thailand |
| Answer» C. China | |
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Explanation: Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS was first seen in China. World Health Organization (WHO) physician Dr. Carlo Urbani identified SARS as a new disease in 2003. He diagnosed it in a 48-yearold businessman who had traveled from the Guangdong province of China, through Hong Kong, to Hanoi, Vietnam. The businessman and the doctor who first diagnosed SARS both died from the illness. |
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| 300. |
If an insect that feeds on feces sits on the food you are going to eat, you are most likely to be infected by which disease? |
| A. | Tuberculosis |
| B. | Cholera |
| C. | Typhoid |
| D. | Hepatitis B |
| Answer» C. Typhoid | |
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Explanation: Typhoid is a bacterial infection that can lead to a high fever, diarrhea, and vomiting. It can be fatal. It is caused by the bacteria Salmonella typhi. |
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