Question 1

Which of the following statements is true?

Accepted Answer

A)   Gene mutations occur independently of each other.
B)   Gene mutations are relatively rare.
C)   Ionizing radiation causes chromosomal damage and free radical formation.
D)   Mutations are random; that is, it is impossible to predict exactly when a specific gene will mutate, but an expected frequency can be assigned.
E)   All of these are true.

Question 2

The portion of the DNA molecule that is translated is composed of

Accepted Answer

A)   introns.
B)   anticodons.
C)   exons.
D)   transcriptions.
E)   exons and transcriptions.

Question 3

MATCHING
Choose the best matching element.
a.deciphered the mRNA code words
b.RNA-directed synthesis of polypeptide chains
c.sites at which RNA polymerases can bind and initiate transcription
d.binds to small subunit platform of a ribosome
e.guided and catalyzed by RNA polymerases
f.polypeptide chain elongation proceeds independently at each body in this cluster
g.discovered transposons
h.a tRNA triplet opposite a codon
i.a set of three nucleotides
-McClintock

Accepted Answer

G

Question 4

Ricin is

Accepted Answer

A)   a substance found in castor bean seeds.
B)   a polysaccharide extracted from rice.
C)   an ingredient in many paints and cosmetics.
D)   a protein that inactivates ribosomes.
E)   a substance found in castor bean seeds and a protein that inactivates ribosomes.

Question 5

The two steps of transcription followed by translation

Accepted Answer

A)   explain the structural complexity of genes.
B)   describe the flow of genetic information.
C)   are based upon the role of proteins in controlling life.
D)   do not explain how genes function.
E)   explain evolution in terms of molecular biology.

Question 6

Classification.You will need a genetic code table to answer the following.The following statements refer to the five RNA codons listed below; match them appropriately.
a.AUG
b.UAA
c.UUU
d.UUA
e.AAA
-The anticodon AAA pairs with this codon.

Accepted Answer

The answer of Classification.You will need a genetic code table...

Question 7

-The structure in the above figure demonstrates which of the following?

Accepted Answer

A)   transcription and translation occur simultaneously on a single strand
B)   ribosomes attached to a strand of DNA
C)   a small ribosomal subunit
D)   multiple ribosomes on a strand of mRNA
E)   all of these

Question 8

____ molecules carry protein-assembly instructions from the nucleus to the cytoplasm.

Accepted Answer

A)   Template DNA
B)   Messenger RNA
C)   Transfer RNA
D)   Ribosomal RNA
E)   All of these B

Question 9

-Which event of translation is shown in the figure above?

Accepted Answer

A)   initiation
B)   elongation
C)   termination
D)   peptide bond formation
E)   elongation and peptide bond formation A

Question 10

During the termination stage

Accepted Answer

A)   a STOP codon enters the ribosome.
B)   release factors bind the ribosome.
C)   mRNA detaches from the ribosome and the polypeptide chain.
D)   ribosomal subunits separate.
E)   all of these occur.

Question 11

The relationship between strands of RNA and DNA is

Accepted Answer

A)   antagonistic.
B)   opposite.
C)   complementary.
D)   an exact duplicate.
E)   unrelated.

Question 12

What are the odds of a given cell division producing a product with a mutation in a region that produces a protein product?

Accepted Answer

There are 7 x 10⁹ base pairs, and only 17...

Question 13

In transcription, RNA polymerase binds to a __________ in the DNA near a gene, and then assembles a strand of RNA.

Accepted Answer

The answer of In transcription, RNA polymerase binds to a...

Question 14

If the DNA triplets are ATG-CGT, the mRNA codons are

Accepted Answer

A)   AUG-CGU.
B)   ATG-CGT.
C)   UAC-GCA.
D)   UAG-CGU.
E)   all of these.

Question 15

A gene mutation

Accepted Answer

A)   is a change in the nucleotide sequence of DNA.
B)   may be caused by environmental agents.
C)   may arise spontaneously.
D)   can occur in any organism.
E)   is described by all of these.

Question 16

DNA and RNA are alike in

Accepted Answer

A)   the pentose sugar.
B)   all the nitrogenous bases used to assemble the genetic code.
C)   the number of strands.
D)   their function in genetics.
E)   none of these.

Question 17

MATCHING
Choose the best matching element.
a.deciphered the mRNA code words
b.RNA-directed synthesis of polypeptide chains
c.sites at which RNA polymerases can bind and initiate transcription
d.binds to small subunit platform of a ribosome
e.guided and catalyzed by RNA polymerases
f.polypeptide chain elongation proceeds independently at each body in this cluster
g.discovered transposons
h.a tRNA triplet opposite a codon
i.a set of three nucleotides
-Nirenberg, Leder

Accepted Answer

The answer of MATCHING
Choose the best matching element.
a.deciphered the mRNA...

Question 18

-Which stage of translation is shown in the figure above?

Accepted Answer

A)   initiation
B)   elongation
C)   termination
D)   peptide bond formation
E)   polysome activity

Question 19

Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid specified by the codon.

Accepted Answer

The answer of Each tRNA has an __________ that base-pairs...

Question 20

There are how many different kinds of RNA codons?

Accepted Answer

A)   3
B)   12
C)   28
D)   64
E)   120

Exam 9: From Dna to Protein

Which of the following statements is true?

Correct Answer
verified

The portion of the DNA molecule that is translated is composed of

Correct Answer
verified

Correct Answer
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G

Ricin is

Correct Answer
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The two steps of transcription followed by translation

Correct Answer
verified

Classification.You will need a genetic code table to answer the following.The following statements refer to the five RNA codons listed below; match them appropriately. a.AUG b.UAA c.UUU d.UUA e.AAA -The anticodon AAA pairs with this codon.

Correct Answer
verified

-The structure in the above figure demonstrates which of the following?

Correct Answer
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____ molecules carry protein-assembly instructions from the nucleus to the cytoplasm.

Correct Answer
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B

-Which event of translation is shown in the figure above?

Correct Answer
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A

During the termination stage

Correct Answer
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The relationship between strands of RNA and DNA is

Correct Answer
verified

What are the odds of a given cell division producing a product with a mutation in a region that produces a protein product?

Correct Answer
verified
There are 7 x 10⁹ base pairs, and only 17...
View Answer

In transcription, RNA polymerase binds to a __________ in the DNA near a gene, and then assembles a strand of RNA.

Correct Answer
verified

If the DNA triplets are ATG-CGT, the mRNA codons are

Correct Answer
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A gene mutation

Correct Answer
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DNA and RNA are alike in

Correct Answer
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Correct Answer
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-Which stage of translation is shown in the figure above?

Correct Answer
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Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid specified by the codon.

Correct Answer
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There are how many different kinds of RNA codons?

Correct Answer
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Exam 9: From Dna to Protein

Which of the following statements is true?

Correct AnswerverifiedShow Answer

The portion of the DNA molecule that is translated is composed of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedG

Ricin is

Correct AnswerverifiedShow Answer

The two steps of transcription followed by translation

Correct AnswerverifiedShow Answer

Classification.You will need a genetic code table to answer the following.The following statements refer to the five RNA codons listed below; match them appropriately. a.AUG b.UAA c.UUU d.UUA e.AAA -The anticodon AAA pairs with this codon.

Correct AnswerverifiedShow Answer

-The structure in the above figure demonstrates which of the following?

Correct AnswerverifiedShow Answer

____ molecules carry protein-assembly instructions from the nucleus to the cytoplasm.

Correct AnswerverifiedB

-Which event of translation is shown in the figure above?

Correct AnswerverifiedA

During the termination stage

Correct AnswerverifiedShow Answer

The relationship between strands of RNA and DNA is

Correct AnswerverifiedShow Answer

What are the odds of a given cell division producing a product with a mutation in a region that produces a protein product?

Correct AnswerverifiedThere are 7 x 109 base pairs, and only 17...View AnswerShow Answer

In transcription, RNA polymerase binds to a __________ in the DNA near a gene, and then assembles a strand of RNA.

Correct AnswerverifiedShow Answer

If the DNA triplets are ATG-CGT, the mRNA codons are

Correct AnswerverifiedShow Answer

A gene mutation

Correct AnswerverifiedShow Answer

DNA and RNA are alike in

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

-Which stage of translation is shown in the figure above?

Correct AnswerverifiedShow Answer

Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid specified by the codon.

Correct AnswerverifiedShow Answer

There are how many different kinds of RNA codons?

Correct AnswerverifiedShow Answer

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G

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B

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A

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There are 7 x 10⁹ base pairs, and only 17...
View Answer

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