- tRNA has two unequal free arms ....
(a) Short arm ending in -A and long arm in
-ACC
(b) Short arm ending in -G and long arm in -
CCA
(c) Short arm ending in -G and long arm in
-CGA
(d) Short arm ending in C and long arm in
-GCA
- Purine possess nitrogen at
(a) 1, 2, 4 and 6 positions
(b) 1, 3, 5 and 7 positions
(c) 1, 3, 7 and 9 positions
(d) 1, 2, 6 nad 8 positions
- If a DNA segment consists of 210
nucleotide pairs, what will be the number
of nucleotides and amino acids in mRNA
transcribed from it and in the polypeptide
chain translated by it respectively?
(a) 70 and 210 (b) 210 and 70
(c) 70 and 70 (d) 210 and 210
- 1.7 m double helical DNA will have base
pairs ....
(a) 3.4 ×10^9 (b) 1.7×10^5
(c) 1.7×10^9 (d) 5×10^9
- In a diploid organism with 30,000 bases
haploid genome contains 23% A residues.
What is the number of G residues in the
genome?
(a) 16000 (b) 16200 (c) 14500 (d) 8100
- Read (i) to (v) and find the correct option
i. Nitrogen base is linked to pentose sugar
through N-glycosidic linkage
ii. Phosphate group is linked to 5’ - OH of
a nucleoside through phosphoester
linkage
iii.Two nucleosides are linked through
N-glycosidic linkage
iv.Negatively charged DNA is
wrapped around to form nucleosome
v. Chromatin that is more densely packed
and stains dark is called euchromatin
(a) i alone is wrong
(b) iv alone is wrong
(c) iii and v are wrong
(d) i, ii, iii wrong
- In which of the following will DNA melt
at the lowest temperature ...
(a) 5’ -AATAAAGC -3’ 3’ -TTATTTCG
-5’
(b) 5’ -AATGCTGC -3’ 3’ -TTACGACG
-5’
(c) 5’ -ATGCTGAT -3’ 3’ -TACGACTA
-5’
(d) 5’ -GCATAGCT -3’ 3’ -CGTATCGA
-5’
- Who wrote “It has not escaped our notice
that the specific pairing we have postulated
immediately suggests a possible copying
mechanism for the genetic material” ...
(a) Watson and Crick
(b) Beadle and Tatum
(c) Meselson and Stahl
(d) Nirenberg and Ochoa
- Which of the following statements about
the Hershey-Chase experiment is false?
MOLECULAR BASIS OF INHERITANCE
