, MOLECULAR BASIS OF INHERITANCE
LEVEL -1 Multiple Revision Based MCQs( strictly based on
NCERT )
Q1. DNA length is measured in terms c. Random polarity
of number of
d. No polarity
a. Amino acids
Q6. The pitch of DNA double helix is
b. Nucleotides
a. 0.34 nm
c. Sugars
b. 2 nm
d. Phosphate groups
c. 3.4 nm
Q2. ΦX174 bacteriophage genome
contains d. 34 nm
a. 5386 nucleotides Q7. Number of base pairs per turn of
DNA is
b. 48502 bp
a. 8
c. 3.3 × 10⁹ bp
b. 10
d. 4.6 × 10⁶ bp
c. 12
Q3. A–T in DNA are linked by
d. 6
a. 1 H-bond
Q8. Distance between two adjacent
b. 2 H-bonds base pairs in DNA is
c. 3 H-bonds a. 0.34 nm
d. 4 H-bonds b. 3.4 nm
Q4. G–C base pairing involves c. 0.03 nm
a. 1 H-bond d. 2 nm
b. 2 H-bonds Q9. DNA was discovered by
c. 3 H-bonds a. Watson
d. 4 H-bonds b. Franklin
Q5. The two strands of DNA show c. Hershey
a. Parallel polarity d. Meischer
b. Antiparallel polarity Q10. Purines include
a. A and G
, b. C and T Q16. A histone octamer contains
c. C and U a. 4 proteins
d. T and U b. 6 proteins
Q11. Pyrimidines include c. 10 proteins
a. A and G d. 8 proteins
b. C, T, U Q17. DNA wrapped around a histone
octamer forms
c. A, C, G
a. Nucleosome
d. G, T, U
b. Ribosome
Q12. Major factor stabilising DNA is
c. Chromatid
a. Peptide bonds
d. Centrosome
b. Glycosidic bonds
Q18. Each nucleosome contains
c. Phosphodiester bonds approximately
d. Base stacking a. 100 bp
Q13. Complementary base pairing b. 150 bp
helps in
c. 200 bp
a. Mutation
d. 300 bp
b. Transcription
Q19. Transcriptionally active
c. Semiconservative replication chromatin is
d. Translation a. Euchromatin
Q14. Uracil is found in b. Heterochromatin
a. DNA only c. Both
b. RNA only d. None
c. Both DNA & RNA Q20. Inactive and darkly stained
chromatin is
d. Neither
a. Euchromatin
Q15. Histones are rich in
b. Heterochromatin
a. Serine and Methionine
c. Isolated DNA
b. Tyrosine and Lysine
d. Ribosomal DNA
c. Lysine and Arginine
Q21. Griffith’s experiment
d. Proline and Valine
demonstrated
LEVEL -1 Multiple Revision Based MCQs( strictly based on
NCERT )
Q1. DNA length is measured in terms c. Random polarity
of number of
d. No polarity
a. Amino acids
Q6. The pitch of DNA double helix is
b. Nucleotides
a. 0.34 nm
c. Sugars
b. 2 nm
d. Phosphate groups
c. 3.4 nm
Q2. ΦX174 bacteriophage genome
contains d. 34 nm
a. 5386 nucleotides Q7. Number of base pairs per turn of
DNA is
b. 48502 bp
a. 8
c. 3.3 × 10⁹ bp
b. 10
d. 4.6 × 10⁶ bp
c. 12
Q3. A–T in DNA are linked by
d. 6
a. 1 H-bond
Q8. Distance between two adjacent
b. 2 H-bonds base pairs in DNA is
c. 3 H-bonds a. 0.34 nm
d. 4 H-bonds b. 3.4 nm
Q4. G–C base pairing involves c. 0.03 nm
a. 1 H-bond d. 2 nm
b. 2 H-bonds Q9. DNA was discovered by
c. 3 H-bonds a. Watson
d. 4 H-bonds b. Franklin
Q5. The two strands of DNA show c. Hershey
a. Parallel polarity d. Meischer
b. Antiparallel polarity Q10. Purines include
a. A and G
, b. C and T Q16. A histone octamer contains
c. C and U a. 4 proteins
d. T and U b. 6 proteins
Q11. Pyrimidines include c. 10 proteins
a. A and G d. 8 proteins
b. C, T, U Q17. DNA wrapped around a histone
octamer forms
c. A, C, G
a. Nucleosome
d. G, T, U
b. Ribosome
Q12. Major factor stabilising DNA is
c. Chromatid
a. Peptide bonds
d. Centrosome
b. Glycosidic bonds
Q18. Each nucleosome contains
c. Phosphodiester bonds approximately
d. Base stacking a. 100 bp
Q13. Complementary base pairing b. 150 bp
helps in
c. 200 bp
a. Mutation
d. 300 bp
b. Transcription
Q19. Transcriptionally active
c. Semiconservative replication chromatin is
d. Translation a. Euchromatin
Q14. Uracil is found in b. Heterochromatin
a. DNA only c. Both
b. RNA only d. None
c. Both DNA & RNA Q20. Inactive and darkly stained
chromatin is
d. Neither
a. Euchromatin
Q15. Histones are rich in
b. Heterochromatin
a. Serine and Methionine
c. Isolated DNA
b. Tyrosine and Lysine
d. Ribosomal DNA
c. Lysine and Arginine
Q21. Griffith’s experiment
d. Proline and Valine
demonstrated
