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
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?
1. Genetic code is specific
2. Genetic code is not ambiguous
3. Genetic code is redundant
4. Genetic code is nearly universal
1. 60
2. 240
3. 120
4. 480
1. A-G, C-T
2. A-T, G-C
3. A-C, G-T, A-C, E-T
4. All of these
The largest gene in a man is:
1. Insulin gene
2. Tumour suppressor gene
3. Beta globin gene of haemoglobin
4. Dystrophin
One gene-one enzyme relationship was established for the first time in:
1. Neurosporacrassa
2. Salmonella typhimurium
3. Escherichia coli
4. Diplococcuspneumoniae
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 |
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