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. GUU, GCU - Alanine
2. UAG, UGA - Stop
3. AUG, ACG - Start/methionine
4. UUA, UCA -Leucine
1. GUU, GCU - Alanine
2. UAG, UGA - Stop
3. AUG, ACG - Start/methionine
4. UUA, UCA -Leucine
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
The length of the DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
1. Deletion of non-essential genes
2. Super-coiling in nucleosomes
3. DNAse digestion
4. Through the elimination of repetitive DNA
Differentiation of organs and tissues in a developing organism is associated with:
1. developmental mutations
2. differential expression of genes
3. lethal mutations
4. deletion of a gene
The two polynucleotide chains in DNA are:
1. parallel
2. discontinuous
3. antiparallel
4. semiconservative
Amino acid sequence, in protein synthesis is decided by the sequence of:
1. t-RNA
2. m-RNA
3. c-DNA
4. r-RNA
Antiparallel strands of a DNA molecule mean that:
| 1. | one strand turns anti-clockwise |
| 2. | the phosphate groups of two DNA strands, at their ends, share the same position |
| 3. | the phosphate groups at the start of two DNA strands are in opposite positions (pole) |
| 4. | one strand turns clockwise |
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 |
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