Biology MCQs from the latest book edition

1. Plants increase proportion of __________ while responding to cold stress:
A. Amino acids
B. Nucleic acids
C. Unsaturated fatty acids
D. Saturated fatty acids

2. In science, the current number of species of organisms is:
A. 2500000
B. 25000000
C. 2500
D. None of these

3. What are those animals called in which body temperature tends to fluctuate more or less when air or water temperature changes?
A. Poikilotherms
B. Heterotherms
C. Homeotherms
D. Endotherms

4. In a biological method, which one is the correct sequence?
A. Hypothesis->observation->deduction->testing of deduction
B. Law->theory->deduction->observation
C. Observation->hypothesis->law->theory
D. Observation->hypothesis->deduction->testing of deduction

5. Mammals possess brown fat specialized for rapid formation of:
A. Urine
B. Faeces
C. Heat
D. Sweat

6. Study of chemical compounds & chemical processes in living organisms is:
A. Molecular biology
B. Chemistry
C. Biochemistry
D. Both B & C

7. The characteristic in which terrestrial animals can tolerate dehydration is known as:
A. Pyrosis
B. Chlorosis
C. Hydrobiosis
D. Anhydrobiosis

8. Which of the following is an organic compound?
A. Lipids
B. HCI
C. CO2
D. Water

9. A network of capillaries in which blood vessel of kidney subdivides:
A. Reticular capillaries
B. Efferent capillaries
C. Tubular capillaries
D. Peritubular capillaries

10. ________ is the chemical component which has the same % in bacterial as the mammalian cell has:
A. Proteins
B. Lipids
C. Water
D. Carbohydrate

11. Nitrogenous nature lead to the elimination of wasteful metabolites called:
A. Excretion
B. Respiration
C. Digestion
D. Assimilation

12. ________ has the highest contribution in total mammalian cell weight:
A. Lipids
B. Water
C. Proteins
D. Carbohydrate