MEMBRANE STRUCTURE AND FUNCTION QUIZ

What is the function of messenger RNA?

It is a component of the ribosomes

It is a direct copy of a gene

It carries amino acids

It is the genetic material of some organisms

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The genetic material of retroviruses such as HIV is

all of these

RNA

protein

DNA

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What is the average size (in bp) of a mature t-RNA?

140 bp

100 bp

120 bp

80 bp

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Retroviruses replicate via __________ intermediate

RNA

mRNA

rDNA

DNA

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Which of following RNA characteristically contains unusual purines and pyrimidmes?

nRNA

rRNA

tRNA

mRNA

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What modified base is at the 5' extremity of a capped eukaryotic m-RNA?

7-methyl-guanosine

2'-O-methyl-guanosine

1-methyl-adenosine

1-methyl-guanosine

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

None of these

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

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A nicked RNA molecule can be ligated by

DNA polymerase

T4 RNA ligase

all of these

T4 DNA ligase

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The mRNA from which of the following would contain a poly-A tail?

Bacterial alpha-amylase

A restriction endonuclease from E. coli

Bacteriophage DNA ligase

Human insulin

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RNA instability in alkaline solutions is due to

single strand nature

uracil

ribose

adenine

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