RNA STRUCTURE QUIZ

In RNA, uracil pairs with

adenine

thymine

guanine

cytosine

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Which of following RNA characteristically contains unusual purines and pyrimidmes?

mRNA

nRNA

rRNA

tRNA

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The genetic material of retroviruses such as HIV is

DNA

protein

RNA

all of these

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Retroviruses replicate via __________ intermediate

RNA

DNA

rDNA

mRNA

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The tertiary structure of yeast tRNA

resembles the 3-dimensional structure of other tRNAs

involves extensive base stacking interactions

is maintained mostly by non-Watson-Crick base pairing

All of these

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Which of the following is the smallest of the RNAs?

Ribosomal RNAs

Messenger RNA

Transfer RNAs

All of these

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A nicked RNA molecule can be ligated by

T4 DNA ligase

T4 RNA ligase

all of these

DNA polymerase

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The anticodon is a structure on

mRNA.

aribosome.

rRNA.

tRNA.

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

2'-O-methyl-guanosine

7-methyl-guanosine

1-methyl-guanosine

1-methyl-adenosine

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What is the function of messenger RNA?

It carries amino acids

It is the genetic material of some organisms

It is a component of the ribosomes

It is a direct copy of a gene

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