Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
Options
(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?
Options
(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?
Options
(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?
Options
(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
Options
(a) haploids are reproductively more stable than diploids (b) mutagens penetrate in haploids more effectively than diploids (c) haploid […]
Sickle cell anaemia is:
Options
(a) caused by substitution of valine by glutamic acids in the beta globin chain of heamoglobin (b) caused by change in single base pair of DNA (c) characterised […]
A test cross is carried out to
Options
(a) determine the genotype of a plant at F2 (b) predict whether two traits are linked (c) assess the number of alleles of a gene […]
A normal-visioned man whose father was colour. Blind, marries a woman whose father was also colour blind. They have their first child as a daughter. What are the chance that this child would be colour […]
A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid cetrificate of his own blood type […]
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