Nucleic acids – quiz 2


#1

Q1. Uracil and ribose form

Uridine

Cytidine

Guanosine

Adenosine

Q2. The most abundant free nucleotide in mammalian cells is

FAD

ATP

NAD

GTP

Q3. The mean intracellular concentration of ATP in mammalian cell is about

1 mM

2 mM

0.1 mM

0.2 mM

Q4. The nucleic acid base found in mRNA but not in DNA is

Adenine

Cytosine

Guanine

Uracil

Q5. In RNA moleule ‘Caps’

Allow tRNA to be processed

Are unique to eukaryotic mRNA

Occur at the 3’ end of tRNA

Allow correct translation of prokaryotic mRNA

Q6. In contrast to eukaryotic mRNA, prokaryotic mRNA

Can be polycistronic

Is synthesized with introns

Can only be monocistronic

Has a poly A tail

Q7. The size of small stable RNA ranges from

0–40 nucleotides

40–80 nucleotides

90–300 nucleotides

More than 320 nucleotides

Q8. The number of small stable RNAs per cell ranges from

10–50,000

50,000–1,00,000

1,00,000–10,00,000

More than 10 lakhs

Q9. In RNA molecule guanine content does not necessarily equal its cytosine content nor does its adenine content necessarily equal its uracil content since it is a

Single strand molecule

Double stranded molecule

Double stranded helical molecule

Polymer of purine and pyrimidine ribonucleotides

Q10. The nitrogenous base present in the RNA molecule is

Thymine

Uracil

Xanthine

Hypoxanthine