Free Biology Online Practice Test

Free Biology Online Practice Test
Free Multiple Choice Questions In Biology
Free online practice tests · Biology
1. Which of the following is not vestigial in man?

(a) Tail vertebrae

(b) Nails

(c) Nictitating membrane

(d) Vermiform appendix

Ans. (b)

2. The chemical used in ‘National Malaria Eradication Programme’ is

(a) 2, 4-D

(b) BHC

(c) DDT

(d) Parathyroid

Ans. (c)

3. A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?

(a) Introns

(b) Exons

(c) Both (a) and (b)

(d) None of these

Ans. (b)

4. The number of hydrogen bonds between adenine and thymine in a DNA molecule is:

(a) Two

(b) Three

(c) Four

(d) Eight

Ans. (a)

5. The enzyme, which combines with non-protein part to form a functional enzyme known a:

(a) co-enzyme

(b) Holoenzyme

(c) Apoenzyme

(d) Prosthetic group

Ans. (b)

6. Which of the following enzyme digest protein in stomach?

(a) Trypsin

(b) Pepsin

(c) Crepsin

(d) None of these

Ans. (b)

7. Passive food ingestion in Amoeba is known as:

(a) Import

(b) Invagination

(c) Circumfluence

(d) Circumvallation

Ans. (a)

8. The slime moulds are characterized by the presence of:

(a) Elaters

(b) Pseudoelaters

(c) Capillitium

(d) Capitulum

Ans. (c)

9. Ecdysone is secreted from:

(a) Insecta

(b) Trematoda

(c) Nematoda

(d) Polychaeta

Ans. (a)

10. In the life cycle of mosquito, comma-shaped stage is

(a) Larval stage

(b) Pupal stage

(c) Imago stage

(d) None of these

Ans. (b)

11. Haemocoel is found in:

(a) Hydra and Aurelia

(b) Taenia and Ascaris

(c) Cockroach and Pita

(d) Balanoglossus and Herd mania

Ans. (c)

12. The group of anamniota includes:

(a) Reptiles and birds

(b) Birds and mammals

(c) Fishes and amphibians

(d) Reptiles and mammals

Ans. (c)

13. The excretory material of bony fish is:

(a) Urea

(b) Protein

(c) Ammonia

(d) Amino acid

Ans. (c)

14. Different colour of frog skin are controlled by:

(a) Hormones

(b) Melanocytes

(c) Nervous system

(d) Both (a) and (c)

Ans. (a)

15. Blastula of frog has:

(a) Blastopore

(b) Blastocoel

(c) Archenteron

(d) Gastropore

Ans. (b)

16. Carotene pigment is found in the cells of:

(a) Dermis

(b) Epidermis

(c) Adipose cell

(d) Both (b) and (c)

Ans. (d)

17. Debove’s membrane is a layer of:

(a) Muscular tissue

(b) Epithelial tissue

(c) Connective tissue

(d) all of the above

Ans. (c)

18. Achilles tendon is associated with:

(a) Gluteus muscle

(b) Hamstring muscle

(c) Quadriceps muscle

(d) Gastrocnemius muscle

Ans. (d)

19. The leucocytes contain which of the following in large quantity?

(a) Basophils

(b) Neutrophils

(c) Eosinophils

(d) Monocytes

Ans. (b)

20. Which part of our body secreted the hormone secretin?

(a) Ileum

(b) Stomach

(c) Duodenum

(d) Oesophagus

Ans. (c)

21. During inspiration, the diaphragm:

(a) Expands

(b) Shows no change

(c) Contracts and flattens

(d) Relaxes to become dome shaped

Ans. (c)

22. The oxygen toxicity is related with:

(a) Blood poisoning

(b) Collapse of alveolar walls

(c) Failure of ventilation of lungs

(d) Both (a) and (b)

Ans. (c)

23. Cardiac output is determined by:

(a) Heart rate

(b) Stroke volume

(c) Blood flow

(d) Both (a) and (b)

Ans. (d)

24. The important function of lymph is to:

(a) Transport oxygen to the brain

(b) Transport carbon dioxide to the lungs

(c) Return RBCs to the limuloids

(d) Return interstitial fluid to the blood

Ans. (d)

25. The lining of intestine and kidneys in humans is:

(a) Keratinized

(b) Brush border

(c) Ciliated

(d) None of these

Ans. (b)