Question 1

Compare and contrast the three major RNA molecules involved in translation.

Accepted Answer

mRNA, tRNA, and rRNA are all single-stra...

Question 2

What is the reason calico cats are almost always female?

Accepted Answer

A)  inactivation of the X chromosome
B)  lack of a Y chromosome in females
C)  activation of the calico gene by the female sex hormone estrogen
D)  inactivation of the calico gene in males by the sex hormone testosterone
E)  a mutation on the X chromosome

Question 3

In eukaryotic cells, ________ occurs in the nucleus, resulting in the production of mRNA, which then travels to the cytoplasm for protein synthesis via ________.

Accepted Answer

transcript...

Question 4

The genetic material of some viruses, such as HIV, is not normal DNA but is instead:

Accepted Answer

A)  RNA.
B)  protein.
C)  carbohydrate.
D)  lipid.
E)  single-stranded DNA.

Question 5

tRNA is necessary for transcription to occur. True or False?

Accepted Answer

A) True 
 B)False

Question 6

Which of the following has the fewest nucleotides in its strand?

Accepted Answer

A)  mRNA having 75 nucleotides.
B)  mRNA having 50 codons.
C)  protein having 40 amino acids.
D)  protein with 2 polypeptides, each having 35 amino acids.
E)  mRNA having 100 bases.

Question 7

All of the following are directly involved in translation EXCEPT:

Accepted Answer

A)  ribosomes.
B)  tRNA.
C)  amino acids.
D)  DNA.
E)  mRNA.

Question 8

A tRNA that carries a specific amino acid enters the protein-synthesizing machinery at the ribosomes and pairs with the appropriate:

Accepted Answer

A)  codon.
B)  anticodon.
C)  charge.
D)  amino acid.

Question 9

Which of the following elongates RNA molecules in the nucleus?

Accepted Answer

A)  ribosomal RNA
B)  DNA
C)  messenger RNA
D)  transfer RNA
E)  RNA polymerase

Question 10

Steroid hormones have the ability to regulate transcription. True or False?

Accepted Answer

A) True 
 B)False

Question 11

How can a single gene code for more than one protein?

Accepted Answer

A)  Different RNA polymerases transcribe it and produce different proteins.
B)  Different types of ribosomes translate the resulting mRNA, producing different proteins.
C)  Different introns can be removed to produce different proteins.
D)  The exons within a mRNA can be spliced together in different ways.

Question 12

Which of the following is noted when comparing DNA and RNA?

Accepted Answer

A)  No sugar is present in either molecule.
B)  Hydrogen bonding is important only in DNA.
C)  Only DNA has a backbone made up of sugars and phosphates.
D)  Adenine pairs with different bases in DNA and RNA.
E)  Thymine pairs with different bases in DNA and RNA.

Question 13

Suppose the template DNA strand of a "mini-gene" has the base sequence TACCCGGATTCA. The anticodon of the tRNA that carries the first amino acid to the ribosome will be:

Accepted Answer

A)  AUG.
B)  UAC.
C)  UCA.
D)  AGU.

Question 14

What is the anticodon for AUC?

Accepted Answer

A)  TAG
B)  AUC
C)  GAU
D)  CUA
E)  UAG

Question 15

Transfer RNA is:

Accepted Answer

A)  a nucleic acid that, by itself, codes for the primary structure of a protein.
B)  made directly from DNA during transcription.
C)  permanently incorporated into the structure of ribosomes.
D)  larger if the protein to be made has a longer amino acid sequence.

Question 16

Give the sequence of bases in transcribed mRNA from the original DNA base sequence TAGGCTAA.

Accepted Answer

The answer of Give the sequence of bases in transcribed...

Question 17

The Barr body is the X chromosome in the cell that is expressed, while the other X chromosome is inactivated. True or False?

Accepted Answer

A) True 
 B)False

Question 18

In females, an entire X chromosome is inactivated in each cell. The inactivated X chromosome is called the ________.

Accepted Answer

The answer of In females, an entire X chromosome is...

Question 19

Which of the following molecules functions to transfer genetic information from one generation to the next?

Accepted Answer

A)  DNA
B)  mRNA
C)  tRNA
D)  proteins
E)  lipids

Question 20

Which point mutation would be most likely to have a catastrophic effect?

Accepted Answer

A)  a base substitution
B)  a base deletion near the start of the coding sequence
C)  a base deletion near the end of the coding sequence
D)  the deletion of three bases near the start of the coding sequence
E)  a base insertion near the end of the coding sequence

Exam 12: Gene Expression and Regulation

Steroid hormones have the ability to regulate transcription. True or False?

Correct AnswerverifiedShow Answer

Which of the following has the fewest nucleotides in its strand?

Correct AnswerverifiedShow Answer

How can a single gene code for more than one protein?

Correct AnswerverifiedShow Answer

tRNA is necessary for transcription to occur. True or False?

Correct AnswerverifiedShow Answer

A tRNA that carries a specific amino acid enters the protein-synthesizing machinery at the ribosomes and pairs with the appropriate:

Correct AnswerverifiedShow Answer

Compare and contrast the three major RNA molecules involved in translation.

Correct AnswerverifiedmRNA, tRNA, and rRNA are all single-stra...View AnswerShow Answer

Which of the following elongates RNA molecules in the nucleus?

Correct AnswerverifiedShow Answer

In eukaryotic cells, ________ occurs in the nucleus, resulting in the production of mRNA, which then travels to the cytoplasm for protein synthesis via ________.

Correct Answerverifiedtranscript...View AnswerShow Answer

Which of the following molecules functions to transfer genetic information from one generation to the next?

Correct AnswerverifiedShow Answer

Suppose the template DNA strand of a "mini-gene" has the base sequence TACCCGGATTCA. The anticodon of the tRNA that carries the first amino acid to the ribosome will be:

Correct AnswerverifiedShow Answer

Which point mutation would be most likely to have a catastrophic effect?

Correct AnswerverifiedShow Answer

In females, an entire X chromosome is inactivated in each cell. The inactivated X chromosome is called the ________.

Correct AnswerverifiedShow Answer

Transfer RNA is:

Correct AnswerverifiedShow Answer

All of the following are directly involved in translation EXCEPT:

Correct AnswerverifiedShow Answer

What is the anticodon for AUC?

Correct AnswerverifiedShow Answer

The Barr body is the X chromosome in the cell that is expressed, while the other X chromosome is inactivated. True or False?

Correct AnswerverifiedShow Answer

Which of the following is noted when comparing DNA and RNA?

Correct AnswerverifiedShow Answer

The genetic material of some viruses, such as HIV, is not normal DNA but is instead:

Correct AnswerverifiedShow Answer

Give the sequence of bases in transcribed mRNA from the original DNA base sequence TAGGCTAA.

Correct AnswerverifiedShow Answer

What is the reason calico cats are almost always female?

Correct AnswerverifiedShow Answer

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mRNA, tRNA, and rRNA are all single-stra...
View Answer

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In eukaryotic cells, occurs in the nucleus, resulting in the production of mRNA, which then travels to the cytoplasm for protein synthesis via .

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transcript...
View Answer

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