In eukaryotes which of the following is removed from initially transcribed RNA before it is transported to the cytoplasm for translation ?
(1) Intron
(2) 3' Poly A tail
(3) Ribosome binding site
(4) 5' cap
Difficulty Level:
The process of splicing in eukaryotes :
(1) is reminiscent of antiquity
(2) represents dominance of RNA world
(3) is an indicator of the complexity of human genome
(4) is a legacy of organic evolution
Concept Questions :-
Difficulty Level:
In prokaryotes, the predominant site for control of gene expression is the :
(1) transcription initiation
(2) processing level
(3) transport of mRNA
(4) translation level
Concept Questions :-
Difficulty Level:
In Hershey and Chase experiment, what finding led to the conclusion that DNA is the genetic material ?
(1) The presence of radioactivity in the bacteria when 35S was used.
(2) The presence of radioactivity in the supernatant when 35S was used.
(3) The presence of radioactivity in the bacteria when 32P was used.
(4) The presence of radioactivity in the supernatant when 32P was used.
Concept Questions :-
Difficulty Level:
Which of the following important biochemical reactions in living systems is catalyzed by a ribozyme?
(1) Repair of DNA
(2) Electron transport chain
(3) Formation of peptide bond
(4) Organization of MTOC during cell division
Concept Questions :-
Difficulty Level:
VNTR are useful in DNA profiling because they:
I. Are hypervariable
II. Are inherited
III. Synthesize constitutiveenzymes
(1) I, II, III are correct
(2) I and II are correct
(3) I and III are correct
(4) II and III are correct
Concept Questions :-
Difficulty Level:
Match each item in COLUMN I with one in COLUMN II and select your answer from the codes given:
|
COLUMN I |
COLUMN II |
|
SCIENTIST |
CONTRIBUTION |
|
Francis Crick |
a. Breaking the genetic code |
|
Nirenberg |
b. Eastablished Coenorthabditis elegans as as a model genetics study organism |
|
Benzer |
c. Central dogma of molecular biology |
|
Brenner |
d. Bacteriophase genetics |
|
|
A |
B |
C |
D |
|
(1) |
c |
a |
d |
b |
|
(2) |
c |
a |
B |
d |
|
(3) |
a |
b |
c |
d |
|
(4) |
a |
c |
d |
B |
Concept Questions :-
Difficulty Level:
Which enzyme polymerizes RNA with defined sequences in a template independent manner?
(1) Peptidyl transferase
(2) RNA polymerase
(3) Reverse transcriptase
(4) Polynucleotide phosphorylase
Concept Questions :-
Difficulty Level:
The process of RNA splicing shows the dominance of :
(1) DNA world
(2) RNA world
(3) Protein world
(4) Microbial world
Concept Questions :-
Difficulty Level:
In RNA splicing :
(1) Exons are removed and introns are joined together
(2) Introns are removed and exons are joined together
(3) Cistrons are removed and introns are joined together
(4) Introns are removed and Cistrons are joined together
Concept Questions :-
Difficulty Level:
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