Multiple Choice QuestionsWhich one of the following a wrongly matched?
Transcription - Writing information from DNA to t-RNA
Translation - Using information in m - RNA to make protein
Repressor protein - Binds to operator to stop enzyme synthesis
Repressor protein - Binds to operator to stop enzyme synthesis
Transformation was discovered by
Meselson and Stahi
Hershey and Chase
Griffith
Griffith
The first human hormone produced by recombinant DNA technology is
insulin
estrogen
thyroxin
thyroxin
An analysis of chromosomal DNA using the Southern hybridization technique does not use
electrophoresis
blotting
autoradiography
autoradiography
Removal of RNA polymerase -III from nucleoplasm will affect the synthesis of
tRNA
rRNA
mRNA
mRNA
PCR and Restriction Fragment Length Polymorphism are the methods for
Study of enzymes
Genetic transformation
DNA sequencing
DNA sequencing
Which one of the following is not a part of a transcription unit in DNA?
The inducer
A terminator
A promoter
A promoter
A single strand of nucleic acid tagged with a radioactive molecule is called
vector
selectable marker
plasmid
plasmid
Ribosomal RNA is actively synthesised in
lysosomes
nucleolus
nucleoplasm
nucleoplasm
B.
nucleolus
In eukaryotes, the site of synthesis of most of the ribosomal RNA (rRNA) is nucleolus. The nucleolar organiser contains many copies of ribosomal DNA (repetitive DNA). The RNA cistron of nucleolar DNA forms 45 S precursor with the help of RNA polymerase. This 45 S RNA undergoes to give 18S, 28S and 5.8 S rRNA units. Out of different rRNAs, the 5S rRNA is not synthesized in nucleolus. It is synthesized outside it.
It is used to ligate introduced DNA in recipient cells
It serves as a selectable marker
It is isolated from a virus
It is isolated from a virus
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