List- I | List-II | ||
(a) | Bacteriophage \(\phi \times 174\) | (i) | 48502 base pairs |
(b) | Bacteriophage lambda | (ii) | 5386 nucleotides |
(c) | Escherichia coli | (iii) | 3.3 × 109 base pairs |
(d) | Haploid content human DNA | (iv) | 4.6 × 106 base pairs of |
(a) | (b) | (c) | (d) | |
1. | (i) | (ii) | (iii) | (iv) |
2. | (ii) | (iv) | (i) | (iii) |
3. | (ii) | (i) | (iv) | (iii) |
4. | (i) | (ii) | (iv) | (iii) |
1. | No radioactive sulfur in bacterial cells |
2. | Both radioactive sulfur and phosphorus in bacterial cells |
3. | Radioactive sulfur in bacterial cells |
4. | Radioactive phosphorus in bacterial cells |
Statement I: | DNA polymerases catalyse polymerisation only in one direction, that is 5' →3' |
Statement II: | During replication of DNA, on one strand the replication is continuous while on other strand it is discontinuous. |
List-I | List-II | ||
(a) | In lac operon i gene codes for | (i) | transacetylase |
(b) | In lac operon z gene codes for | (ii) | permease |
(c) | In lac operon y gene codes for | (iii) | \(\beta-\)galactosidase |
(d) | In lac operon a gene codes for | (iv) | Repressor |
(a) | (b) | (c) | (d) | |
1. | (iii) | (ii) | (i) | (iv) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (iv) | (i) | (iii) | (ii) |
4. | (iii) | (i) | (iv) | (ii) |
What would be the proportions of light and hybrid density DNA molecule, respectively if Meselson and Stahl's experiment was continued for 60 minutes?
1. 50%, 50%
2. 25%, 75%
3. 75%, 25%
4. 100%, 0%
One of the strands of double stranded DNA has base composition as follows: 15% A, 15% T, 40%G and 30%C. What will be the percentage of these bases in the complementary strand ?
1. 15% A, 15% T, 30% G , 40% C
2. 15% A, 30% T, 40% G , 15% C
3. 15% A, 15% T, 40% G , 30% C
4. 15% A, 40% T, 15% G , 30% C
With respect to nucleosome, which of the following statements is incorrect ?
1. | Nucleosome contains 120 bp of DNA helix. |
2. | Nucleosomes are seen as 'beads' on string' under Electron Microscope. |
3. | DNA is wrapped around positively charged histone octamer to form nucleosome. |
4. | Nucleosome is the repeating unit of chromatin. |