Biology MCQs from latest book editionBy: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025 12 Score: 0 Attempted: 0/12 Subscribe 1. : Plants increase the 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) 2,500,000 (B) 25,000,000 (C) 2,500 (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) HCl (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 leads 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 Related Posts:Biology Multiple Choice Questions from latest book editionAccounting MCQs Latest book EditionAccounting MCQs Latest book EditionMCQs Of Geography Latest Book EditionPhysics MCQs from latest Books EditionComputer Architecture MCQs from latest Books edition