The okazaki fragments in DNA chain growth
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(a) polymerize in the 3′-to-5′ direction and forms replication fork (b) prove semi-conservative nature of DNA replication (c) polymerize in the ‘5-to-3′ direction and explain […]
Read the following four statements (A-D). (A) In transcription, adenosine pairs with uracil. (B) Regulation of lac operon by repressor is referred to as positive regulations. (C) The human genome has approximately 50,000 genes. (D) […]
Which of the following forms the basis of DNA Finger printing?
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(a) The relative proportions of purines and pyrimidines in DNA. (b) Satellite DNA occurring as highly rpeated short DNA segments (c) […]
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
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(a) GUU, GCU – Alanine (b) UAG, UGA – Stop […]
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly mathced with the category mentioned against it?
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(a) Thymine, Uracil – Pyrimidines (b) Uracil, Cytosine – Pyrimidines (c) […]
The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
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(a) super-coiling in nucleosomes (b) DN ase disgestion (c) through elimination of […]
During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?
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(a) AATT (b) CACC (c) TATA (d) TTAA
Correct Answer:
TATA
Explanation: […]
Select the two correct statements out of the four(a-d) give below about lac operon. (i) Glucose or galactose may bind with the repressor and inactive it (ii) In the absence of lactose the represor binds […]
Haploids are more suitable for mutation studies than the diploids. This is because
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(a) haploids are reproductively more stable than diploids (b) mutagens penetrate in haploids more effectively than diploids (c) haploid […]
Read the following four statements (A-D).
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(a) Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane (b) In dicot stems, a new cambium originates from cellls of pericycle […]
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