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190+ Biology Solved MCQs

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These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) , Union Public Service Commission (UPSC) , Indian Administrative Service (IAS) , Staff Selection Commission (SSC) .

Chapters

Chapter: Biology
51.

The monocarpic plants produce flowers only ________?

A. Once in a year
B. Once in a season
C. Once in lifetime
D. One flower per plant
Answer» C. Once in lifetime
52.

Which among the following is the correct meaning of Phyllotaxy?

A. Classification of plants as per the leaves structure
B. The manner of arrangement of leaves in stem or branch
C. The manner the leaves fall from the branches
D. The anatomy of leaves in angiosperms
Answer» B. The manner of arrangement of leaves in stem or branch
53.

In which of the following insects, a pigment called luciferin is found?

A. Housefly
B. Firefly
C. Sandfly
D. Fruitfly
Answer» B. Firefly
54.

A plant belonging to which of the following groups would show least adaptation to marine water?

A. Pteridophytes
B. Gymnosperms
C. Angiosperms
D. Bryophytes
Answer» C. Angiosperms
55.

A treatment with which among the following plant hormones would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability?

A. Ethylene
B. Abscisic Acid
C. Gibberelic Acid
D. Auxin
Answer» B. Abscisic Acid
56.

A tablet of which among the following Vitamins should be advised to be used after purification of water by Iodine as a disinfectant?

A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Answer» C. Vitamin C
57.

Who among the following scientists is known for devising four criteria designed to establish a causal relationship between a causative microbe and a disease?

A. Louis Pasteur
B. Emil Behring
C. Ivan Pavlov
D. Robet Koch
Answer» D. Robet Koch
58.

A combination of several medicines called SHREZ is used in the treatment of which among the following diseases?

A. HIV/ AIDS
B. Diphtheria
C. Tuberculosis
D. Malaria
Answer» C. Tuberculosis
59.

The most popular Zero Calorie sugar substitutes in the market are made up of Sucralose, as an artificial sweetner. Why sucralose does not have calories?

A. Because the Sucralose is 600 times more sweet than Sucrose (Natural Sugar) and thus its low quantity gives same taste but zero calories when it is digested in the body.
B. Because the chemical composition of Sucralose is such that its oxidation gives less calories in body compared to the Sucrose.
C. Because Sucralose is not a Carbohydrate
D. Because Sucralose is not digested in the body
Answer» D. Because Sucralose is not digested in the body
60.

As per the WHO definition, within how many days of the termination of pregnancy, the death of a woman is counted in the Maternal Mortality?

A. 36 Days
B. 42 Days
C. 56 Days
D. 60 Days
Answer» B. 42 Days
61.

Consider the following statements:
1. For some diseases like Malaria and Denue, techniques of Population suppression of Vectors is favored over the disease resistance techniques
2. RIDL is a Population suppression technique.
Which among the above statements is / are correct?

A. Only 1 is correct
B. Only 2 is correct
C. Both 1 & 2 are correct
D. Neither 1 nor 2 is correct
Answer» C. Both 1 & 2 are correct
62.

Which among the following have been found to produce a protein called Defensin-1, which has been found potential to develop drugs for antibiotic resistant bacteria?

A. Codfish
B. Cuttle Fish
C. Honey bee
D. Domestic Fly
Answer» C. Honey bee
63.

The Gram Positive Bacteria can be identified by the Gram staining because of the following reasons?

A. The cell walls have more lipids compared to peptidoglycan
B. The Cells walls have more Peptidoglycan compared to Lipids
C. The Cells membrane has more fatty acids
D. The plasma has Peptidoglycans
Answer» B. The Cells walls have more Peptidoglycan compared to Lipids
64.

The Bovine spongiform encephalopathy (BSE) is commonly known as _______?

A. Foot & Mouth Disease
B. Mad Cow Disease
C. Fog fever
D. Creutzfeldt-Jakob disease
Answer» B. Mad Cow Disease
65.

Consider the following statements about Archaeopteryx:
1. Archaeopteryx was the earliest and most primitive bird known, when it was found in Germany in late 19th century
2. The discovery of Archaeopteryx put an end to the debate that Birds originated from Dinosaurs or the archosaurian reptiles.
Which among the above statements is / are correct?

A. Only 1 is correct
B. Only 2 is correct
C. Both 1 & 2 are correct
D. Neither 1 nor 2 are correct
Answer» A. Only 1 is correct
66.

The natural Pacemaker in the Human Heart is located in the SA node which is present in which among the following chambers?

A. Right Auricle
B. Left Auricle
C. Right Ventricle
D. Left Ventricle
Answer» A. Right Auricle
67.

Consider the following statements regarding the GMO (Genetically Modified Organisms) and LMO (Living Modified Organism):
GMO are essentially dead , while the LMO are alive and can grow
GMO are patentable, while LMO are not patentable
GMO are modified using Genetic Engineering, while LMO are modified by other technologies.
Which among the above statements is / are correct?

A. Only 1 & 2 are correct
B. Only 2 & 3 are correct
C. All are correct
D. None of them is correct
Answer» D. None of them is correct
68.

Overdose of antibiotics will cause the suppression of synthesis of which among the following vitamins in human body?

A. Vitamin A
B. Calciferol
C. Vitamin K
D. Biotin
Answer» D. Biotin
69.

Who among the following first synthesized ―gene‖ in a laboratory ?

A. Arthur kornberg
B. Hargobind Khorana
C. Gregor Mendel
D. Watson and crick
Answer» B. Hargobind Khorana
70.

Which among the following is correct definition of Bacteriophage?

A. A Bacteria that destroys Virus
B. A Virus that destroys Bacteria
C. A Bacteria that destroys another bacteria
D. A Bacteria that destroys Fungi
Answer» B. A Virus that destroys Bacteria
71.

A particular cell organelle is sometimes referred certain enzymes that can break down the cell components or even the whole cell. which one of the following is such an organelle ?

A. Lysosome
B. Mesosome
C. Phagosome
D. Ribosome
Answer» A. Lysosome
72.

The disorder ―Pityriasis simplex capillitii ‖ is most commonly known as which among the following?

A. Tulip fingers
B. Dandruff
C. Baldness
D. Eczema
Answer» B. Dandruff
73.

What is the number of the Chromosomes affected by Turner syndrome?

A. 44
B. 45
C. 46
D. 47
Answer» B. 45
74.

Ornithophily refers to the pollination through which among the following?

A. Wind
B. Insects
C. Birds
D. Water
Answer» C. Birds
75.

The insect ―Apis mellifera‖ is commonly known as which among the following?

A. Sand Fly
B. Domestic Fly
C. Honey Bee
D. Spider
Answer» C. Honey Bee
76.

Which among the following element in the human body / organ makes the main basis of working of the MRI (Magnetic resonance imaging)?

A. Nitrogen
B. Hydrogen
C. Calcium
D. Sodium
Answer» B. Hydrogen
77.

The term ―Halitosis‖ denotes which among the following?

A. Bad hearing
B. bad breathe
C. Baldness
D. Excessive Sweating
Answer» B. bad breathe
78.

The term ―Gypsophils‖ is associated with the people who have liking for which among the following?

A. Vultures
B. Eagles
C. Hawks
D. Falcons
Answer» A. Vultures
79.

Bubo bubo is the scientific name of which of the following species?

A. Hen
B. Peacock
C. Eagle
D. Owl
Answer» D. Owl
80.

Which among the following Vitamin is added to the milk in some countries as it is lost during the process of Fat Removal (Skimming)?

A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Answer» A. Vitamin A
81.

Consider the following statements:
1. All kinds of Color Blindness are result of Genetic disorders
2. All kinds of Night Blindness are result of malnutrition
Which among the above statements is / are correct?

A. Only 1 is correct
B. Only 2 is correct
C. Both 1 & 2 are correct
D. Neither 1 nor 2 are correct
Answer» D. Neither 1 nor 2 are correct
82.

Which among the following diseases is very rare in women compared to the men affected with the same disorder?

A. Osteoporosis
B. Color blindness
C. Nyctalopia
D. Down Syndrome
Answer» B. Color blindness
83.

Which among the following disease has the minimum incubation period, comparing to other ones?

A. Small Pox
B. Influenza
C. Measles
D. Mumps
Answer» B. Influenza
84.

Deficiency of Vitamin D leads to lack of absorption of which of the following minerals?

A. Iodine
B. Phosphorus
C. Calcium
D. Iron
Answer» C. Calcium
85.

Which among the following indicates Vitamin B12?

A. Niacin
B. Pyridoxine
C. Cobalamine
D. Thiamine
Answer» C. Cobalamine
86.

Hodophobia is the fear of which of the following?

A. Sleeping
B. Travel
C. Drugs
D. Cattle
Answer» B. Travel
87.

―Pratham‖ the first animal born in 1990 by the IVF (In vitro Fertilization) at the National Dairy Research Institute, Karnal was a ________ ?

A. Cow
B. Buffalo
C. Sheep
D. Goat
Answer» B. Buffalo
88.

Genetic Modification (GM) technique RIDL was in news. RIDL is being developed for combating which of the following disease?

A. Swine Flu
B. Malaria
C. Cancer
D. AIDS
Answer» B. Malaria
89.

Which among the following acid is NOT a Vitamin ?

A. Folic Acid
B. Oleic Acid
C. Pantothenic Acid
D. Ascorbic Acid
Answer» B. Oleic Acid
90.

Which among the following is found in a Bacteriophage?

A. only RNA
B. only DNA
C. Both RNA & DNA
D. Either RNA or DNA
Answer» D. Either RNA or DNA
91.

The correct group of animals that suffer from the ―Foot & Mouth ‖ disease is as follows:

A. Only Cattle
B. Cattle & Sheeps
C. Cattle and Pigs
D. Cattle, Sheeps and Pigs
Answer» D. Cattle, Sheeps and Pigs
92.

Turmeric belongs to from which one of the following family of plants?

A. Radish
B. Ginger
C. Onion
D. Clove
Answer» B. Ginger
93.

For which of the following diseases first successful vaccination was devloped (it is caused by Variola virus)?

A. Cow pox
B. Chicken pox
C. Small pox
D. Polio
Answer» C. Small pox
94.

In which of the following era began the Self replicating RNA molecules on Earth ?

A. Basin Era
B. Nectarian Era
C. Early Imbrian
D. Cryptic Era
Answer» A. Basin Era
95.

What fraction of Body‘s calcium is stored in Bones and teeth?

A. 85%
B. 90%
C. 94%
D. 99%
Answer» D. 99%
96.

Which among the following is NOT a true bast fiber?

A. Jute
B. Hemp
C. Flax
D. Cotton
Answer» D. Cotton
97.

The metals in which among the following groups are required in maximum quantities in a living organism?

A. Potassium, Manganese, Molybdenum, Calcium
B. Potassium, Molybdenum, Copper, Calcium
C. Pottassium,Sodium, Magnesium, Calcium
D. Sodium, Magnesium, Copper, Manganese
Answer» C. Pottassium,Sodium, Magnesium, Calcium
98.

which among the following helps to determine the character of a cell?

A. Nucleus
B. Chromosomes
C. Genes
D. Plasma
Answer» C. Genes
99.

Consider the following statements:
1. Color blindness is more common in men
2. Color blindness is an X-linked recessive trait
3. If both the X chromosomes are defective, a woman may have color blindness
Which among the above statements are correct?

A. 1 only
B. 1 & 2
C. 2 & 3
D. all are correct
Answer» D. all are correct
100.

What name has been given to the fear of crossing roads?

A. Arthrophobia
B. Atychiphobia
C. Aichmophobia
D. Agyrophobia
Answer» D. Agyrophobia

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