Q. No.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 Okazaki fragments in DNA chain growth:
| 1. | result in transcription |
| 2. | polymerize in the 3'-to-5' direction and forms replication fork |
| 3. | prove semi-conservative nature of DNA replication |
| 4. | polymerize in the 5'-to-3' direction and explain 3'-to-5' DNA replication |
The two polynucleotide chains in DNA are:
1. parallel
2. discontinuous
3. antiparallel
4. semiconservative
One gene-one enzyme relationship was established for the first time in:
1. Neurosporacrassa
2. Salmonella typhimurium
3. Escherichia coli
4. Diplococcuspneumonia
A sequential expression of a set of human genes occurs when a steroid molecule binds to the:
1. transfer RNA
2. messenger RNA
3. DNA sequence
4. ribosome
Which antibiotic inhibits the interaction between t-RNA and m-RNA using bacterial protein synthesis?
1. Erythromycin
2. Neomycin
3. Streptomycin
4. Tetracycline
Amino acid sequence, in protein synthesis is decided by the sequence of:
1. t-RNA
2. m-RNA
3. c-DNA
4. r-RNA
One gene – one enzyme hypothesis was postulated by:
1. R. Franklin
2. Hershey and Chase
3. A. Garrod
4. Beadle and Tatum
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 |
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