Allelic sequence variation where more than one variant allele at a locus in. a human population with a frequency greater than 0.01 is referred to as:
1. DNA polymorphism
2. Multiple allelism
3. SNP
4. EST
The Okazaki fragments in DNA chain growth:
| 1. | results in transcription |
| 2. | polymerise in the 3' to 5' direction and forms replication fork |
| 3. | prove semi-conservative nature of DNA replication |
| 4. | polymerise in the 5' to 3' direction and explain 3' to 5' DNA replication |
One gene-one enzyme relationship was established for the first time in:
1. Neurosporacrassa
2. Salmonella typhimurium
3. Escherichia coli
4. Diplococcuspneumoniae
The largest gene in a man is:
1. Insulin gene
2. Tumour suppressor gene
3. Beta globin gene of haemoglobin
4. Dystrophin
1. A-G, C-T
2. A-T, G-C
3. A-C, G-T, A-C, E-T
4. All of these
1. 60
2. 240
3. 120
4. 480
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 |
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