Select the correct match
1. Alc Jeffreys – Automated DNA sequencers
2. Frederick Sanger – Amino acid sequencing
3. Holley – Inverted L-shaped Structure of tRNA
4. Meselson & Stahl – DNA structure
In the human being, chromosome 1 has A genes and Y has B genes.
Select the option which correctly fills A and B.
1. A – 2968, B – 231
2. A – 231, B – 2968
3. A – 2168, B – 321
4. A – 321, B – 2168
During post-transcriptional modification of hnRNA, capping involves.
1. Addition of poly-A tail at 3' end
2. Addition of 7 mG cap at 5' end
3. Removal of introns
4. Addition of 7 mG cap at 3' end
Degenerate, triplet, commaless, overlapping, universal in eukaryotes only |
How many of the above features are associated with universal genetic code?
1. Five
2. Three
3. Four
4. Two
Select the incorrect statements from the following
(a) | There are the evidence that DNA was the first genetic material in the history of life. |
(b) | No RNA acts as catalyst |
(c) | DNA replication is said to be semiconservative as it has two strands of polynucleotide chain. |
(d) | A nitrogenous base is linked to the pentose sugar through N-glycosidic linkage. |
1. (a), (b) and (c)
2. (b) and (c) only
3. (c) and (d)
4. (b) and (d)
Match column-I with column-II and choose the
correct option
Column-I Column-II
a. RNA polymerase I (i) hnRNA
b. RNA polymerase II (ii) tRNA
c. RNA polymerase III (iii) 28 S rRNA
1. a(iii), b(ii), c(i)
2. a(iii), b(i), c(ii)
3. a(i), b(ii), c(iii)
4. a(ii), b(iii), c(i)
According to human genome project, the maximum number of genes are present on
1. An allosome
2. An autosome
3. A chromosome present in males only
4. A chromosome present in females only
Avery et. al. found that transformation is affected by
1. Protease
2. RNase
3. DNase
4. Lipase
Presence of which of the following features make(s) the RNA less stable as compared to
DNA?
(a) Free 2' OH
(b) Single ringed nitrogenous base
(c) Uracil in place of 5-methyl uracil
1. (a) and (c)
2. (a) and (b)
3. (b) and (c)
4. (c) only
Alfred Hershey and Martha Chase unequivocally proved that DNA is genetic material by using
1. Bacteriophage
2. Cyanophage
3. Fungi
4. Vicia faba