Q. No.
Length of one turn of the helix in a B-form DNA is approximately
1. 3.4 nm
2. 2 nm
3. 0.34 nm
4. 20 nm
Enzymes enhance the rate of reaction by
1. forming a reactant-product complex
2. changing the equilibrium point of the reaction
3. combining with the product as soon as it is formed
4. lowering the activation energy of the reaction
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Feedback inhibition of an enzymatic reaction is caused by
1. end product
2. substrate
3. enzyme
4. rise in temperature
Due to the discovery of which of the following in 1980, the evolution was termed as RNA world?
1. mRNA, tRNA, rRNA synthesize proteins
2. In some viruses, RNA is the genetic material
3. RNA have enzymatic property
4. RNA is not found in all cells
Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by
| 1. | base-sugar-phosphate |
| 2. | base-sugar-OH |
| 3. |  |
| 4. | sugar-phosphate |
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Which of the following is the simplest amino acid?
| 1. | Alanine | 2. | Asparagine |
| 3. | Glycine | 4. | Tyrosine |
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