Q. No.PCR and Restriction Fragment Length Polymorphism are the methods for:
1. Study of enzymes
2. Genetic transformation
3. DNA sequencing
4. Genetic fingerprinting
1. sn RNA
2. hn RNA
3. 23 S rRNA
4. 5 S rRNA
Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?
1. Thymine, Uracil - Pyrimidines
2. Uracil, Cytosine - Pyrimidines
3. Guanine, Adenine - Purines
4. Adenine, Thymine - Purines
Match the following genes of the lac operon with their respective products:
| (a) | i gene | (i) | -galactosidase |
| (b) | Z gene | (ii) | Permease |
| (c) | A gene | (iii) | Repressor |
| (d) | Y gene | (iv) | transacetylase |
Select the correct option
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (i) | (iii) | (ii) | (iv) |
| 3. | (iii) | (i) | (ii) | (iv) |
| 4. | (iii) | (i) | (iv) | (ii) |
Purines found both in DNA and RNA are:
| 1. | Cytosine and thymine | 2. | Adenine and thymine |
| 3. | Adenine and guanine | 4. | Guanine and cytosine |
Under which of the following conditions will there be no change in the reading frame of the following mRNA?
5'AACAGCGGUGCUAUU 3'
| 1. | Deletion of GGU from 7th, 8th and 9th positions |
| 2. | Insertion of G at the 5th position |
| 3. | Deletion of G from the 5th position |
| 4. | Insertion of A and G at the 4th and the 5th positions respectively |
Expressed Sequence Tags (ESTs) refers to:
| 1. | Novel DNA sequence | 2. | Genes expressed as RNA |
| 3. | Polypeptide expression | 4. | DNA polymorphism |
What key characteristic of T2 bacteriophage allowed Hershey and Chase to use it in their studies of the genetic material?
| 1. | Its genes encode proteins that assemble to produce the viral coat. |
| 2. | It injects its genetic material into a bacterial cell. |
| 3. | It can undergo either the lytic or lysogenic life cycle. |
| 4. | It enters the bacterial cell to cause infection. |
Which of the following statements about the structure of DNA is incorrect?
1. One complete turn requires 3.4 nm and 10 base pairs.
2. The backbones of each strand run in opposite directions relative to each other.
3. Each pair of nucleotides is held together by three hydrogen bonds.
4. The width of the molecule is a constant 2nm.
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