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Biology Multiple Choice Questions

Updated on June 1, 2014

1. The enzyme used to form a phosphodiester bond in a nick between a 3’end of one DNA chain and a 5 end of another is

a) DNA ligase

b) DNA polymerase

c) Restriction Endonuclease

d) S1 nuclease

2. The arrangement of the somatic chromosomes compliment (Karyotype) of a cell in groups of homologous pairs is called

a) Phenogram

b) Idiogram

c) Dendrogram

d) None of these

3. A radioisotope used to label proteins deferentially from nucleic acid is

a) P 32

b) N 15

c) C 14

d) S 35

4. Genetic disorders can be treated through gene therapy. The father of gene therapy is

a) Galton

b) Anderson

c) Khorana

d) Garrod

5. Which of the following statement is correct?

a) The term hybrid vigour given by Schull is technically Heterosis

b) Hybrids are often superior to either parent due to homozygosity

c) A collection of clones having recombinant DNA is called gene pool

d) Eugenics is the study of improvement of present generation

6. Which one of the following is correct group of DNA histone proteins?

a) H2A, H2B, H3, H4

b) H1, H2, H3, H4

c) H1A, H2B, H3, H4

d) H2A, H2B, H3B, H4B

7. Triticale has been developed through intergeneric hybridisation between:

a) Wheat and rye

b) Wheat and rice

c) Wheat and aegilops

d) Rice and maize

8. Board spectrum antibiotics are

a) Antibiotics having ability to act only on several pathogenic species differing from each other in structure and composition of their cell wall

b) Antibiotics having ability to act only on one or two types of pathogenic species covering a board area

c) Antibiotics having ability to act ony on particular type of pathogenic species in huge quantity

d) Antibiotics which are active at microorganisms which live in higher in higher range spectrum

Lock and Key Hypotheis
Lock and Key Hypotheis

9. Which of the following is the best evidence for the lock and key theory of enzyme action?

a) All isolated enzymes have been identified as protein

b) Compound similar in stucture to the substrate inhibit the reaction

c) Enzymes are found in living organisms and speed up certain reaction

d) Enzymes determine the direction of a reaction

10. The term feedback refers to

a) The effect of substrate on the rate of enzymatic reaction

b) The effect of end product on the rate of enzymatic reaction

c) The effect of enzymes concentration on its reaction.

d) The effect of an external compound on the rate of enzymatic reaction

Ecology Questions


  1. a
  2. b
  3. d
  4. b
  5. a
  6. a
  7. a
  8. a
  9. c
  10. b


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    • teaches12345 profile image

      Dianna Mendez 4 years ago

      Well, I can't say I understood all of this, but I found it fascinating. I am sure this will help many who need the information.