Homework 3 Flashcards by mustafa dahbur | Brainscape

Q

What group is attached to the pyrimidine ring in thymine and is not present in uracil?

ribose

–CH3

–NH2

deoxyribose

none of the above

A

CH3

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Q

Eukaryotic transcription differs from prokaryotic transcription in which manner?

AUG is the initiation codon.

The RNA is a continuous message.

Spliceosomes are necessary to excise introns.

The polyA tail is a component of all mRNA transcripts.

A

Spliceosomes are necessary to excise introns.

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Q

Please classify these statements regarding translation as either TRUE or FALSE.

a) Each amino acid has its own tRNA molecule.

A

True

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Q

Please classify these statements regarding translation as either TRUE or FALSE.

b) mRNA, rRNA, and tRNA are required for the process.

A

True

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Q

Please classify these statements regarding translation as either TRUE or FALSE.

c) There are only 20 codons that code for a separate amino acid.

A

False

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Q

Please classify these statements regarding translation as either TRUE or FALSE.

d) The tRNA molecule contains the codon that binds to the anticodon on the mRNA strand.

A

False

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Q

Please classify these statements regarding translation as either TRUE or FALSE.

e) Proteins are produced in the C terminus → N terminus direction.

A

False

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Q

The term rRNA refers to ______ RNA.

retroviral

recombinant

rho factor

ribosomal

A

ribosomal

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Q

Which of the following is a function of the ribosome?
I bind mRNA and allow codon recognition
II mediate the binding of proteins necessary for initiation, elongation, and termination
III catalyze synthesis of peptide bonds
IV translocate such that multiple codons can be read

I, II

I, IV

I only

II only

I, II, III, IV

A

I, II, III, IV

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Q

At a pH above its pKa, the phenol group of tyrosine is ______________

A

deprotonated

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Q

A β-sheet is an example of a ____________ structure.

A

Secondary.

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