Rna Structure(Biochemistry ) Questions and answers for exam Preparation

Question 1. The tertiary structure of yeast tRNA

resembles the 3-dimensional structure of other tRNAs
involves extensive base stacking interactions
is maintained mostly by non-Watson-Crick base pairing
All of these

Explanation:-

Answer: Option D. -> All of these

Question 2. The genetic material of retroviruses such as HIV is

protein
all of these
DNA
RNA

Explanation:-

Answer: Option D. -> RNA

Question 3. A nicked RNA molecule can be ligated by

all of these
T4 RNA ligase
DNA polymerase
T4 DNA ligase

Explanation:-

Answer: Option D. -> T4 DNA ligase

Question 4. The anticodon is a structure on

aribosome.
rRNA.
tRNA.
mRNA.

Explanation:-

Answer: Option C. -> tRNA.

Question 5. Which of following RNA characteristically contains unusual purines and pyrimidmes?

rRNA
mRNA
nRNA
tRNA

Explanation:-

Answer: Option D. -> tRNA

Question 6. Retroviruses replicate via __________ intermediate

rDNA
mRNA
RNA
DNA

Explanation:-

Answer: Option D. -> DNA

Question 7. Two features of the tRNA molecule associated, in converting the triplet codon to an amino acid, are

in the T Loop and D stem and loop
in the anticodon loop and D stem loop
in the anticodon loop and the 3' CCA end
None of these

Explanation:-

Answer: Option C. -> in the anticodon loop and the 3' CCA end

Question 8. In RNA, uracil pairs with

thymine
cytosine
adenine
guanine

Explanation:-

Answer: Option C. -> adenine

Question 9. During RNA synthesis, the DNA template sequence 5'Tp Ap Gp Cp 3' Would be transcribed to produce which of the following RNA sequence?

5'-Ap Tp Cp Gp-3'
5'-Ap Up Cp Gp-3'
5'-Gp Cp Tp Ap-3'
5'-Gp Cp Up Ap-3'

Explanation:-

Answer: Option D. -> 5'-Gp Cp Up Ap-3'

Question 10. RNA instability in alkaline solutions is due to

uracil
single strand nature
adenine
ribose

Explanation:-

Answer: Option D. -> ribose