Course

Genetics

Study Pack

Set 9 Gene Expression And Gene Regulation

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Question 1

(Multiple Choice)

Free
Prions are created when normal proteins in the body ____.

A) combine with large ribosomal subunit and become infectious
B) exchange several long sections of amino acids with other infected proteins
C) refold into a different and infectious three-dimensional shape that kills cells in the brain and nervous system
D) undergo mutation and create hundreds of copies of themselves
E) invade the immune system, causing it to mistakenly destroy the body's healthy tissue

Answer

Question 2

(Multiple Choice)

Free
At one end of a tRNA molecule is a sequence of 3 nucleotides called an anticodon that ____.

A) signals the production of a ribosome
B) signals the unwinding of the DNA coils
C) initiates the movement of mRNA out of the cell nucleus and into the cytoplasm
D) binds to its anti-complementary tRNA codon
E) binds to its complementary mRNA codon

Answer

Question 3

(Multiple Choice)

Free
The three-dimensional shape of a protein is determined by the ____ and the results of chemical modifications and other processing events.

A) interaction of R groups
B) interaction with other polypeptide chains
C) amino acid sequence
D) bonds formed with other proteins
E) initiation complex

Answer