- Read the following statements and choose the
correct option.
I. RNA polymerase associates transiently with
‘Rho’ factor to initiate transcription.
II. In bacteria, transcription and translation
takes place in the same compartment.
III. RNA polymerase I is responsible for trans-
cription of tRNA.
IV. When hnRNA undergoes capping process,
adenylate residues are added at 3 ′-end in a
template independent manner.
V.hnRNA is the precursor of mRNA.
(a) Only II (b) II, III and IV
(c) III and IV (d) I and V
- Which option shows correctly labelled region
in the given diagram of DNA replication?
(a) A and C (b) Only C
(c) A and B (d) B and C- Study the following Columns.
Column I Column II
A. Exon 1. Site for binding of RNA polymerase
B. Capping 2. Coding sequence
C. Tailing 3. Lagging strand
D. Promoter 4. Methyl guanosine triphosphate
- Adenylate residues
Codes
AB C D
(a)24 5 1
(b)24 1 5
(c)31 2 4
(d)42 3 1
- Which of the following events would occur in
lac operon of E. coli when the growth medium
has high concentration of lactose?
(a)The structural genes fail to produce polycistronicmRNA
(b) The repressor protein binds to RNA polymerase and
prevents translation(c) The repressor protein attaches to the promoter
sequence and depresses the operator(d)The inducer molecule binds to repressor protein and
RNA polymerase binds to promoter sequence- Consider the following statements in
eukaryotes:
I. RNA polymerase I transcribes rRNAs.
II. RNA polymerase II transcribes snRNAs.
III. RNA polymerase III transcribes hnRNA.
IV. RNA polymerase II transcribes hnRNA.
Which of the statements given above are
correct?
(a) I and II (b) I and III(c) I, II and IV (d) I and IV
- Match the Column with their respective amino
acids and choose the correct answer.
Column I Column II
A. UUU 1. Serine
B. GGG 2. Methionine
C. UCU 3. Phenylalanine
D. CCC 4. Glycine
E. AUG 5. Proline
Codes
AB C DE
(a)34 1 52
(b)31 4 52
(c)34 5 12
(d)24 1 53
- Compare the statements I and II.
State ment I A monocistronic mRNA can
pro duce sev eral types of polypeptide chains.
Statement II The terminator codon is
present on the mRNA.
(a)Both the statements I and II are incorrect
(b) Statement I is correct and II is incorrect(c) Statement I is incorrect and II is correct
(d)Both the statements I and II are correct- An analysis of a DNA (double-stranded)
sample yielded 18% cytosine. What would be
the percentage of other bases in sample?
(a)T–32%, A–32%, G–18%
(b)T–32%, A–18%, G–32%(c)T–18%, A–32%, G–32%
(d)T–40%, A–22%, G–20%5 ′3 ′A5 ′3 ′BLagging strandCSmart Practice