Biology
Chromosome and DNA
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#41 Which one of the following experiment proved that, DNA replication is semiconservative?
A) Griffith exp
B) A very exp
C) Hershey and chase exp.
D) Meselson-stahl exp.
#42 Replication bubble is formed due to the activity of
A) DNA helicase
B) DNA polymerase
C) DNA ligase
D) None of these
#43 Short oligonucleotide strands of RNA which act as start site for the activity of DNA polymerase are called
A) SSB
B) Primers
C) Promoters
D) Okazaki fragments
#44 The replacement of primers by DNA nucleotides is carried out by
A) DNA polymerase I
B) DNA polymerase II
C) DNA polymerase III
D) DNA ligase
#45 RNA polymerase consists of 4 segments α, β, β’ and
A) ¥
B) Sigma
C) £
D) None of these
#46 Protein coding sequence of primary mRNA are called
A) Exon
B) Intron
C) Non-sense codon
D) None of these
#47 Which one of the following is post-transcriptional modification of mRNA?
A) Elongation phase
B) Termination phase
C) RNA splicing
D) None of these
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