Molecular Biology and Genetics MCQs | Page - 2
Dear candidates you will find MCQ questions of Molecular Biology and Genetics here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. The cellular process which utilizes RNA-induced silencing complex to block gene expression is
✅ Correct Answer: (B)
RNA interference
Q. In a genetic cross between the genotypes WWXX and wwxx, the following phenotypic distributions were observed among the F2 progeny: WX, 562; wx, 158; Wx, 38; and wX, 42. Likewise, a cross between XXYY and xxyy yielded the following results: XY, 675; xy, 175; Xy, 72; and xY, 78. Similarly, a cross between WWYY and wwyy yielded: WY, 292; wy, 88; Wy, 12; and wY, 8. In all the genotypes, capital letters denote the dominant allele. Assume that the F1 progeny were self-fertilized in all three crosses. Also, double cross-over does not occur in this species. Which of the following is correct?
✅ Correct Answer: (C)
Relative position: Y-W-X Distances: Y-W = 5 map units, W-X = 11 map units
Q. The major groove of DNA is lined by
✅ Correct Answer: (C)
N7 of purine and C4 of pyrimidine
Q. An example for template independent DNA polymerase is
✅ Correct Answer: (C)
Terminal deoxynucleotidyl transferase
Q. If a segment of a sense strand of DNA is 5'-ATGGACCAGA-3', then the resulting RNA sequence after transcription is
✅ Correct Answer: (D)
5'-AUGGACCAGA-3'
Q. Which of the following statements with respect to the orientation of the nitrogenous bases to the pentose sugars, and the puckering of the sugar, is correct?
✅ Correct Answer: (B)
Anti, and 2'-endo in B form DNA
Q. Of the two diploid species, species I has 36 chromosomes and species II has 28 chromosomes. How many chromosomes would be found in an allotriploid individual?
✅ Correct Answer: (B)
46 or 50
Q. Ames test is used to determine
✅ Correct Answer: (C)
Both mutagenicity and carcinogenicity of a chemical
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