Q. No.Which one of the following pairs of codons is correctly matched with their function or the signal for the
particular amino acid ?
1. AUG, ACG – start/methionine
2. UUA, UCA – Leucine
3. GUU – Alanine
4. UAG, UGA – stop
particular amino acid ?
1. AUG, ACG – start/methionine
2. UUA, UCA – Leucine
3. GUU – Alanine
4. UAG, UGA – stop
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What is not for genetic code
1. It is unambiguous
2. A codon in mRNA is read in a non-contiguous fashion
3. It is nearly universal
4. It is degenerate
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Semiconservative replication of DNA was first demonstrated in
1. Salmonella typhimurium
2. Drosophila melangaster
3. Escherichia coli
4. Streptococcus pneumonia
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Removal of introns and joining of exons in a defined order during transcription is called:
1. Looping
2. Inducing
3. Slicing
4. Splicing
The one aspect which is not a salient feature of genetic code, is its being
1. Ambiguous
2. Universal
3. Specific
4. Degenerate
Select the two correct statements out of the four (a-d) given below about lac operon :
| (a) | Glucose or galactose may bind with the repressor and inactivate it. |
| (b) | In the absence of lactose, the repressor binds with the operator region. |
| (c) | The z-gene codes for permease. |
| (d) | This was elucidated by Francois Jacob and Jacque Monod. |
The correct statements are :
| 1. | (a) and (c) | 2. | (b) and (d) |
| 3. | (a) and (b) | 4. | (b) and (c) |
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Satellite DNA is useful tool in
1. Sex determination
2. Forensic science
3. Genetic engineering
4. Organ transplantation
What are those structures that appear as beads-on-string in the chromosomes when viewed under an electron microscope?
| 1. | Genes | 2. | Nucleotides |
| 3. | Nucleosomes | 4. | Base pairs |
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Removal of RNA polymerase III from nucleoplasm will affect the synthesis of:
1. t-RNA
2. hn-RNA
3. m-RNA
4. r-RNA
Which one of the following is not a part of a transcription unit in DNA?
1. The inducer
2. A terminator
3. A promoter
4. The structural gene
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