Chapter 20 - Chromosomes and DNA - 2


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Chapter 20 - Chromosomes and DNA - 2

1. In 1956 Vernon Ingram discovered molecular basis of:

a) Sickle cell anemia
b) Cancer
c) Phenylketonuria
d) All

2. The strand of DNA being transcribed is called template or:

a) Coding
b) Sense
c) Antisense
d) Both a & b

3. If mutation occur in one or few base pairs then it is called:

a) Line mutation
b) Stop mutation
c) Point mutation
d) None

4. A 10 nucleotide sequence i.e. RNA primer is constructed by:

a) Polymerase III
b) DNA ligase
c) Synthatase
d) Primase

5. The overall stability of DNA is due to:

a) Hyperphobic interaction
b) Ionic bond
c) Phosphodiester bond
d) None

6. DNA was first discovered in 1869 by:

a) Franklind
b) F. Miescher
c) Watson and crick
d) P.A.Levene

7. Mendal’s work was rediscovered in:

a) 1920
b) 1869
c) 1900
d) 1899

8. Histones are positively charged due to:

a) Lysine, glutamine
b) Arginine, lysine
c) Arginine, proline
d) Lysine, serine

9. Chromosomes consist of DNA and protein in:

a) 60 % - 30 %
b) 90 % - 10 %
c) 40 % - 60 %
d) 20 % - 80 %

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