CS/B.Tech/BT (NEW)/SEM-4/BT-401/2013
2013
MOLECULAR BIOLOGY
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10 × 1 = 10
i) In the Hershey and Chase experiment designed to
determine the molecule of heredity, what was
radiolabeled with 35S ?
a) DNA b) Protein
c) RNA d) both (a) & (b).
ii) To help elucidate the double helix structure of DNA,
............... used information provided by ..................
that certain bases are always present in a 1 : 1 ratio.
a) Watson and Crick, Franklin
b) Watson and Crick, Meselson and Stahl
c) Meselson and Stahl, Chargaff
d) Watson and Crick, Chargaff.
iii) During DNA synthesis, the leading strand is synthesized
.................... and the lagging strand is
synthesized ............... .
a) 3’ to 5’ ; 5’ to 3’ b) 3’ to 5’ ; 3’ to 5’
c) 5’ to 3’ ; 3’ to 5’ d) 5’ to 3’ ; 5’ to 3’.
iv) Which of the following sugars is found in RNA ?