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Homework answers / question archive / University of Central Florida FIL 1000 Ch

University of Central Florida FIL 1000 Ch

Chemistry

University of Central Florida

FIL 1000

Ch. 12 Quiz

1)Aminoacyl-tRNA Synthetases are involved in which step of translation? Select one:

a.            activation

b.            initiation

c.             elongation Incorrect

d.            termination

e.            none of these

 

 

2.            As in RNA and DNA synthesis, the synthesis of proteins follows the following steps, except: Select one:

a.            Activation of monomers

b.            Initiation

c.             Elongation

d.            Termination

e.            All of these are involved in all polymer synthesis

 

3.            At which position on the mRNA is the wobble base of the triplet codon? Select one:

a.            first position (5' letter)

b.            second position

c.             third position (3' letter)

d.            the wobble base can be at any position

 

4.            Chaperones assist in protein folding by preventing aggregation of proteins before folding is completed.

Select one:

a.            True

b.            False

 

5.            How many codons are possible in a system in which a sequence of three bases specifies a single amino acid?

Select one:

a.            20

b.            24

c.             27 d. 64

 

6.            Inosine or hypoxanthine can wobble with all the following bases, except: Select one:

a.            A

b.            C

c.             T

d.            U

e.            Inosine can wobble with all of these bases.

 

7.            Protein synthesis in prokaryotes always starts with Select one:

a.            a methionine residue

b.            a formylmethionine residue

c.             a cysteine residue

d.            no specific residue

 

 

8.            The first tRNA (bearing fmet) binds to the Select one:

a.            "A" site of the ribosome. b. "P" site on the ribosome.

c. "E" site on the ribosome.

 

9.            The majority of protein synthesis occurs in the Select one:

a.            nucleus

b.            mitochondrion c. cytoplasm

d. nucleolus

 

10.          Which amino acids have unique codons? Select one:

a. met, gly b. trp, met

c. tyr, met

d. stop, his

 

 

 

 

 

 

 

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