MCQOPTIONS
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MCQOPTIONS
This section includes 67 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When blood is forced into the artery, wave like expansion takes place is called: |
| A. | Heart beat |
| B. | Heart beat |
| C. | Flow |
| D. | Ticking |
| Answer» C. Flow | |
| 2. |
After wound or cut in a body blood coagulates through: |
| A. | WBC |
| B. | RBC |
| C. | Platelets |
| D. | Plasma |
| Answer» D. Plasma | |
| 3. |
Transportation of food in plants takes place through: |
| A. | Xylem |
| B. | Phloem |
| C. | Companion cells |
| D. | Tracheids |
| Answer» C. Companion cells | |
| 4. |
Name the blood vessel which carries blood back to the heart? |
| A. | Vein |
| B. | Artery |
| C. | Capillaries |
| D. | Platelet |
| Answer» B. Artery | |
| 5. |
Which animal has three-chambered heart? |
| A. | Pigeon |
| B. | Lizard |
| C. | Fish |
| D. | Lion |
| Answer» C. Fish | |
| 6. |
In the stem of a plant respiration and breathing takes place through: |
| A. | Lenticels |
| B. | Stomata |
| C. | Root hair |
| D. | Air tubes |
| Answer» B. Stomata | |
| 7. |
Which of the following in biology is the energy currency of cells? |
| A. | PDP |
| B. | DTP |
| C. | ATP |
| D. | ADP |
| Answer» D. ADP | |
| 8. |
Name the condition marked by a low TSH? |
| A. | Hypothyroidism |
| B. | Hyperthyroidism |
| C. | Goitre |
| D. | Thyroid Cancer |
| Answer» C. Goitre | |
| 9. |
Which gland mainly controls and regulates the actual thyroid activity? |
| A. | Pituitary gland |
| B. | Hypothalamus |
| C. | Both A and B |
| D. | Only A |
| Answer» D. Only A | |
| 10. |
What are the functions of thyroid gland in the body? |
| A. | Controls metabolism |
| B. | Maintain internal homeostasis |
| C. | Controls breathing and heart rate |
| D. | All of the above |
| Answer» E. | |
| 11. |
A condition of a chronic inflammation of the thyroid, which lead to under activity? |
| A. | Goitre |
| B. | Thyroiditis |
| C. | Hypothyroidism |
| D. | Hyperthyroidism |
| Answer» C. Hypothyroidism | |
| 12. |
An autoimmune disease of the thyroid tissue is called: |
| A. | Graves disease |
| B. | Thyroiditis |
| C. | Thyroid Cancer |
| D. | None of the above |
| Answer» B. Thyroiditis | |
| 13. |
The symptoms of hypothyroidism are: |
| A. | Dry skin and hair |
| B. | Depression |
| C. | Joint and muscle pain |
| D. | All of the above |
| Answer» E. | |
| 14. |
Name a disease causes due to the deficiency of iodine? |
| A. | Thyroid cancer |
| B. | Solitary thyroid nodules |
| C. | Goitre |
| D. | Thyroiditis |
| Answer» D. Thyroiditis | |
| 15. |
What are the symptoms of release of too much T3 and T4 hormones? |
| A. | Anxiety |
| B. | Nervousness |
| C. | Hair loss |
| D. | All of the above |
| Answer» E. | |
| 16. |
Too much release of thyroid hormone in the body causes: |
| A. | Hypothyroidism |
| B. | Hyperthyroidism |
| C. | Goitre |
| D. | None of the above |
| Answer» C. Goitre | |
| 17. |
What are the two main hormones secreted by Thyroid gland? |
| A. | T3 |
| B. | T4 |
| C. | TSH |
| D. | Both A and B |
| Answer» E. | |
| 18. |
The process by which new species develop from the existing species is called: |
| A. | Homologous |
| B. | Analogous |
| C. | Speciation |
| D. | Genetic variation |
| Answer» D. Genetic variation | |
| 19. |
Which of the following are the postulates of Darwin’s theory of evolution? |
| A. | Within any population, there is natural variation. |
| B. | Even though all species produce a large number of offsprings, populations remain fairly constant naturally. |
| C. | The struggle for survival within populations eliminates the unfit individuals |
| D. | All the above are correct |
| Answer» E. | |
| 20. |
The theory of origin of life on earth is proposed by: |
| A. | Haldane |
| B. | Stanley Miller |
| C. | Harold C. Urey |
| D. | Lamarck |
| Answer» B. Stanley Miller | |
| 21. |
Aves have evolved from: |
| A. | Amphibians |
| B. | Arthropods |
| C. | Mammals |
| D. | Reptiles |
| Answer» E. | |
| 22. |
Who suggested that life must have developed from the simple inorganic molecules like methane, hydrogen etc. which were present on the earth soon after it was formed? |
| A. | Darwin |
| B. | Marrie Curie |
| C. | Haldane |
| D. | None of the above |
| Answer» D. None of the above | |
| 23. |
Name the organs which have different basic structure but have similar appearance and perform similar functions? |
| A. | Analogous organs |
| B. | Homologous organs |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» B. Homologous organs | |
| 24. |
Name a fossil bird which looks like a bird but has many other features found in reptiles? |
| A. | Dodo |
| B. | Archaeopteryx |
| C. | Flamingos |
| D. | Mouse Bird |
| Answer» C. Flamingos | |
| 25. |
Which of the following are the sources which provide evidences for evolution? |
| A. | Homologous organs |
| B. | Analogous organs |
| C. | Fossils |
| D. | All the above |
| Answer» E. | |
| 26. |
Who had given the theory of evolution of species by natural selection? |
| A. | Darwin |
| B. | Mendel |
| C. | Dalton |
| D. | Morgan |
| Answer» B. Mendel | |
| 27. |
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as [NEET 2013] |
| A. | Genetic flow |
| B. | Genetic drift |
| C. | Random mating |
| D. | Genetic load |
| Answer» C. Random mating | |
| 28. |
The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge, is called [NEET 2013] |
| A. | Natural selection |
| B. | Convergent evolution |
| C. | Non-random evolution |
| D. | Adaptive radiation |
| Answer» C. Non-random evolution | |
| 29. |
Which one of the following sequences was proposed by Darwin and Wallace for organic evolution? |
| A. | Overproduction, variations, constancy of population size, natural selection |
| B. | Variations, constancy of population size, overproduction, natural selection |
| C. | Overproduction, constancy of population size, variations, natural selection |
| D. | Variations, natural selection, overproduction, constancy of population size |
| Answer» D. Variations, natural selection, overproduction, constancy of population size | |
| 30. |
Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary period for different groups of organisms, includes |
| A. | study of carbohydrates/proteins in fossils |
| B. | study of the conditions of fossilization |
| C. | Electron Spin Resonance (ESR) and fossil DNA |
| D. | study of carbohydrates/proteins in rocks |
| Answer» D. study of carbohydrates/proteins in rocks | |
| 31. |
The concept of chemical evolution is based on |
| A. | Possible origin of life by combination of chemicals under suitable environmental conditions |
| B. | Crystallization of chemicals |
| C. | Interaction of water, air and clay under intense heat |
| D. | Effect of solar radiation on chemicals |
| Answer» B. Crystallization of chemicals | |
| 32. |
Chemical reactions could have converted simple organic compounds into ______ for the origin of life. |
| A. | Micromolecules |
| B. | Nitrogen, oxygen and other gases |
| C. | Cells |
| D. | Macromolecules |
| Answer» E. | |
| 33. |
What is common to whale, seal and shark? |
| A. | Homeothermy |
| B. | Seasonal migration |
| C. | Thick subcutaneous fat |
| D. | Convergent evolution |
| Answer» E. | |
| 34. |
De Vries gave his mutation theory on organic evolution while working on - |
| A. | Oenothera lamarckiana |
| B. | Drosophila melanogaster |
| C. | Pisum sativum |
| D. | Althea rosea |
| Answer» B. Drosophila melanogaster | |
| 35. |
Diversification in plant life appeared: |
| A. | Due to abrupt mutations |
| B. | Suddenly on earth |
| C. | By seed dispersal |
| D. | Due to long periods of evolutionary changes |
| Answer» E. | |
| 36. |
What is meant by the term Darwin fitness? |
| A. | The ability to survive and reproduce |
| B. | High aggressiveness |
| C. | Healthy appearance |
| D. | Physical strength |
| Answer» B. High aggressiveness | |
| 37. |
Coacervates were experimentally produced by______. |
| A. | Fischer and Huxley |
| B. | Sidney Fox and Oparin |
| C. | Urey and Miller |
| D. | Jacob and Monod |
| Answer» C. Urey and Miller | |
| 38. |
Homologous organs indicate the |
| A. | Convergent evolution |
| B. | Parallel evolution |
| C. | Common descendent |
| D. | Natural selection |
| Answer» D. Natural selection | |
| 39. |
A baby has been born with a small tail. It is the case exhibiting |
| A. | atavism |
| B. | mutation |
| C. | retrogressive evolution |
| D. | metamorphosis |
| Answer» B. mutation | |
| 40. |
The tendency of population to remain in genetic equilibrium may be disturbed by [NEET 2013] |
| A. | Random mating |
| B. | Lack of migration |
| C. | Lack of mutations |
| D. | Lack of random mating |
| Answer» E. | |
| 41. |
Maximum diversity of reptiles was during |
| A. | Jurassic |
| B. | Ordovician |
| C. | Triassic |
| D. | Cretaceous |
| Answer» E. | |
| 42. |
During evolution the first multicellular organism appeared during |
| A. | 1 billion years ago |
| B. | 2 billion |
| C. | 600 million |
| D. | 200 millions |
| Answer» B. 2 billion | |
| 43. |
Angiosperm originated during |
| A. | upper cretaceous |
| B. | lower Jurassic |
| C. | mid cretaceous |
| D. | carboniferous |
| Answer» D. carboniferous | |
| 44. |
First birds and lizards appeared on Earth during ......... period? |
| A. | Jurassic period |
| B. | Carboniferous period |
| C. | Pleistocene period |
| D. | Pleistocene period |
| Answer» B. Carboniferous period | |
| 45. |
During which period in the age of earth did terrestrial life was well established? |
| A. | Pleistocene period |
| B. | Jurassic period |
| C. | Carboniferous period |
| D. | cretaceous |
| Answer» D. cretaceous | |
| 46. |
As per the latest radiometric dating, what is the age of the earth? |
| A. | 4 billion years |
| B. | 4.54 billion years |
| C. | 4.45 billion years |
| D. | 4.64 billion years |
| Answer» C. 4.45 billion years | |
| 47. |
Which geological period in the age of earth is also known as the Age of Fish? |
| A. | Orosirian period |
| B. | Devonian period |
| C. | Ediacaran period |
| D. | Ordovician period |
| Answer» C. Ediacaran period | |
| 48. |
The rise of human civilization is the main characteristics of............. |
| A. | Holocene |
| B. | Pleistocene |
| C. | Pliocene |
| D. | miocene |
| Answer» B. Pleistocene | |
| 49. |
The present epoch in the Earth’s age is known as |
| A. | Holocene |
| B. | Miocene |
| C. | Pleistocene |
| D. | Pliocene |
| Answer» B. Miocene | |
| 50. |
Flowering plants first appeared during........... Period? |
| A. | Jurassic period |
| B. | Carboniferous period |
| C. | Cretaceous period |
| D. | Silurian |
| Answer» D. Silurian | |