McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1651. |
Heart attack occurs due to : |
| A. | Bacterial attack on the heart |
| B. | Stopping of heart beat |
| C. | Lack of blood supply to the heart itself |
| D. | Impairment of heart’s working due to unknown reasons |
| Answer» C. Lack of blood supply to the heart itself | |
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Explanation: A heart attack occurs if the flow of oxygen-rich blood to a section of heart muscle suddenly becomes blocked. If blood) flow isn't restored quickly, the section of heart muscle begins to die. Heart attacks most often occur as a result of coronary heart disease (CHD), also called coronary artery disease. CHD is a condition in which a waxy substance called plaque (plak) builds up inside the coronary arteries. These arteries supply oxygen-rich blood to the heart. |
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| 1652. |
What is an endoscope? |
| A. | It is an optical instrument used to see inside the alimentary canal |
| B. | It is a device which is fitted on the chest of the patient to regularize the irregular heart beats |
| C. | It is an instrument used for examining ear disorders |
| D. | It is an instrument for recording electrical signals produced by human muscles |
| Answer» A. It is an optical instrument used to see inside the alimentary canal | |
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Explanation: Endoscopymeans looking inside and typically refers to looking inside the body for medical reasons using an endoscope, an instrument used to examine the interior of a hollow organ or cavity of the body. Unlike most other medical imaging devices, endoscopes are inserted directly into the organ. Endoscopy can also refer to using a borescope in technical situations where direct line of-sight observation is not feasible. The following conditions and illnesses are most commonly investigated or diagnosed with an endoscopy: breathing disorders; chronic diarrhea; internal bleeding; irritable bowel syndrome; stomach ulcers, etc. |
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| 1653. |
Some viruses have RNA but no DNA. This would indicate that – |
| A. | these viruses cannot replicate |
| B. | these viruses have no heritable information |
| C. | RNA transmits the hereditary information in these viruses |
| D. | their nucleic acids can be crystallised |
| Answer» B. these viruses have no heritable information | |
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Explanation: DNA is an informational molecule encoding the genetic instructions Along with RNA and proteins, it is one of the three major macromolecules that are essential for all known forms of life. Genetic information is encoded as a sequence of nucleotides (guanine, adenine, thymine, and cytosine) recorded using the letters G, A, T, and C. |
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| 1654. |
An antibiotic is - |
| A. | achemical synthesized by a human cell against a microorganism |
| B. | a chemical synthesised by amicro-organism against another micro-organisms |
| C. | a substance produced by blood cells against bacteria |
| D. | a substance produced by blood cells against infection. |
| Answer» B. a chemical synthesised by amicro-organism against another micro-organisms | |
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Explanation: An antibacterial is an agent that inhibits bacterial growth or kills bacteria. Theterm is often used synonymously with the term antibiotic(s); today. The term antibiotic was first used in 1942 by Selman Waksman and his collaborators in journal articles to describe any substance produced by a microorganism that is antagonistic to the growth of other microorganisms in high dilution. |
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| 1655. |
Camel is a desert animal, that can live without water for many days, because - |
| A. | it does not need water |
| B. | water is formed in the body due to oxidation of fat |
| C. | it has the water sac in the walls of the lumen of stomach |
| D. | All of the above |
| Answer» D. All of the above | |
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Explanation: Camels, in ideal conditions, can go 6-7 months without water but as the temperature rises they have to drink water more often. Camels are well known for their humps. They do not, however, literally store water in them as is commonly believed, though they do serve this purpose through roundabout means. |
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| 1656. |
A clone is a colony of : |
| A. | cells having different shapes |
| B. | cells having similar shape |
| C. | cells having similar genetic constitution |
| D. | cells having different genetic constitutions |
| Answer» C. cells having similar genetic constitution | |
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Explanation: A clone is a colony of cells having similar genetic constitutions. A clone is a group of identical cells that share a common ancestry, meaning they are derived from the same mother cell A somewhat similar concept is that of clonal colony (also called a genet), wherein the cells (usually unicellular) also share a common ancestry. |
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| 1657. |
The age of a tree can be determined more or less accurately by - |
| A. | counting the number of branches |
| B. | measuring the height of the tree |
| C. | measuring the diameter of the trunk |
| D. | counting the number of rings in the trunk |
| Answer» D. counting the number of rings in the trunk | |
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Explanation: When a tree has been cut down or felled, then it is relatively easy to work out its age by counting the growth or annual rings that can be seen on the sawn-off stump. Under the bark of a tree is a special tissue (called the cambium) which forms new cells so that the tree can grow. |
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| 1658. |
Which one of the following is true regarding plant cells and animal cells‘? |
| A. | Plant cells contain chloroplast while animal cells do not |
| B. | Plant cells are small while animal cells are large in size |
| C. | Plant cells contain nucleus while animal cells do not |
| D. | Plant cells and animal cells are similar in all respects |
| Answer» A. Plant cells contain chloroplast while animal cells do not | |
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Explanation: Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size. |
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| 1659. |
Which of the following is a perfect match? |
| A. | Coronary attack - vascular dilation |
| B. | Atherosclerosis - blockage of arteries |
| C. | Hypertension - low blood pressure |
| D. | Hypotension - heart attack |
| Answer» D. Hypotension - heart attack | |
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Explanation: In physiology and medicine, hypotension is abnormally low blood pressure, especially in the arteries of the systemic circulation. Hypotension is the opposite of hypertension, which is high blood pressure. Blood pressure is the force of blood pushingagainst the walls of the arteries as the heart pumps out blood. |
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| 1660. |
In the case of test tube babies |
| A. | egg is fertilized in the uterus. |
| B. | embryo completes its development in a test tube. |
| C. | embryo is placed in uterus after 2 months. |
| D. | egg is fertilized outside mother's body. |
| Answer» C. embryo is placed in uterus after 2 months. | |
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Explanation: Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is usually done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods |
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| 1661. |
Which of the following is correct about cold blooded animals? |
| A. | Their blood remains cold all the time |
| B. | Their body temperature changes in accordance with the atmosphere |
| C. | Their body temperature remains constant all the time |
| D. | They kill all the animals they come across (SSC Combined Graduate Level Prelim Exam. |
| Answer» B. Their body temperature changes in accordance with the atmosphere | |
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Explanation: A cold blooded animal, or ectotherm, is one that does not have an internal mechanism for regulating its body temperature. Instead, a cold blooded animal. relies on solar energy captured by the environment. Reptiles, amphibians and fish are examples of cold blooded animals. |
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