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biology MCQs

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
1. Co-enzyme is often formed from ?
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A. vitamin

B. inorganic ion

C. lipid

D. protein

2. About __________ of the body weight of a mammal is water ?
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A. 75%

B. 70%

C. 65%

D. 60%

3. Reverse transcriptase is present in____________?
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A. All DNA viruses

B. All retroviruses

C. All RNA viruses

D. All viruses

4. Which are the four most abundant elements in living cells ?
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A. carbon, oxygen, sulfur, phosphorus

B. carbon, oxygen, hydrogen, nitrogen

C. carbon, sulfur, hydrogen, magnesium

D. carbon, oxygen, nitrogen, sulfur

5. Double fertilization is feature of____________?
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A. Whisk ferns

B. Gymnosperms

C. Angiosperms

D. Ferns

6. The tumours which are of small size and localized are___________?
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A. gentle

B. malignant

C. nasty

D. benign
7. The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called________?
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A. Environmental biology

B. Social biology

C. Human biology

D. Both b and c

8. Pigment present in red algae is_____________?
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A. phycocyanin

B. phycoerythrin

C. fucoxanthin

D. bilirubin

9. True roots absent in_____________?
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A. gymnosperms

B. ferns

C. bryophytes

D. angiosperms

10. Euglena belongs to the kingdom___________?
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A. Monera

B. Protista

C. Fungi

D. Non of them

11. The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________?
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A. An organ

B. A molecule

C. Tissue

D. Both a and c

12. Tibia is a bone found in the ____________?
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A. Skull

B. Leg

C. Arm

D. Face

13. Production of sweat and sebum is related with ?
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A. Liver

B. Lungs

C. Skin

D. GIT

14. Nutrition in fungi is___________?
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A. Absorptive heterotrophs

B. Photosynthetic

C. Chemosynthetic

D. Completely parasitic

15. Kingdom Fungi includes_______________?
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A. A cellular, eukaryotic organisms

B. Non-chlorophylls, multicellular eukaiyotlc organisms

C. Non-chlorophylls, multicellular,thailophytic organisms

D. both B and C
16. Number of chromosomes in E.coli ?
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A. 6

B. 2

C. 1

D. 4

17. It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect?
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A. Older sediment layers did not have these radioactive isotopes

B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.

C. Older sediment layers have equal amount of these radioactive isotopes as that of the young ones

D. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.

18. Animals that eat plants are called___________________?
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A. Herbivores

B. Omnivores

C. Consumer

D. Carnivores

19. The arrangement of ________ speaks of the division of labour within cell?
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A. Atoms

B. Subatomic particles

C. Molecule

D. Organelles
20. Red to orange pigments are_____________?
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A. Chlorophyll

B. Xanthophylls

C. Carotenoids

D. Carotenes