Question 1

Cells may lyse when placed into a hypertonic environment.

Accepted Answer

A) True 
 B)False

Question 2

A process that requires energy to move a substance against its concentration gradient is called:

Accepted Answer

A)  active transport.
B)  osmosis.
C)  facilitated transport.
D)  passive transport.E) A) and C)
F) All of the above

Question 3

How many codons are present in the following strand of mRNA? U A C G G U A G U A U G

Accepted Answer

A)  4
B)  12
C)  3
D)  6E) A) and B)
F) A) and C)

Question 4

The Na+/K+ pump transports three sodium ions out of the cell for every two potassium ions moved into the cell.This is an example of:

Accepted Answer

A)  a symport pump.
B)  an antiport pump.
C)  facilitated diffusion.
D)  a uniport pump.E) B) and D)
F) All of the above

Question 5

Where does protein synthesis occur?

Accepted Answer

A)  peroxisomes
B)  mitochondria
C)  lysosomes
D)  ribosomesE) None of the above
F) B) and C)

Question 6

Explain the roles of messenger and transfer RNA in protein synthesis.

Accepted Answer

Messenger RNA (mRNA)is built from a temp...

Question 7

Describe the role of the mitotic spindle during mitosis.

Accepted Answer

The mitotic spindle is a necessary struc...

Question 8

Aquaporins may be employed during:

Accepted Answer

A)  simple diffusion.
B)  endocytosis.
C)  active transport.
D)  osmosis.E) A) and B)
F) None of the above

Question 9

Resting membrane potential is due to unequal concentrations of:

Accepted Answer

A)  water molecules.
B)  acids and bases.
C)  phospholipids and proteins.
D)  ions.E) None of the above
F) A) and B)

Question 10

Cancer cells:
A)have a slower mitotic rate than normal body cells.
B)do not spread into other body tissues.
C)are indistinguishable from normal body cells.
D)may exhibit metastasis.

Accepted Answer

D ESSAY.Write your a...

Question 11

Which of the following best describes secondary active transport?

Accepted Answer

A)  Secondary active transport involves the movement of a substance into a cell with its concentration gradient.
B)  Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient.
C)  Secondary active transport occurs when one substance is coupled with the passive transport of a second substance.
D)  Secondary active transport involves the movement of water by osmosis into a cell.E) None of the above
F) A) and D)

Question 12

What organelle degrades old,worn-out organelles and cell components?

Accepted Answer

A)  lysosome
B)  peroxisome
C)  rough endoplasmic reticulum (RER) 
D)  Golgi apparatusE) C) and D)
F) A) and C)

Question 13

Determine the differences between cell division of normal cells and that of cancer cells.

Accepted Answer

Normal,noncancerous cells pass through c...

Question 14

How many homologous chromosome pairs are present in most human cells?

Accepted Answer

A)  23
B)  46
C)  4
D)  18E) All of the above
F) C) and D)

Question 15

Cellular swelling is likely to occur when blood cells are immersed in:

Accepted Answer

A)  more concentrated solutions.
B)  isotonic solutions.
C)  hypotonic solutions.
D)  hypertonic solutions.E) A) and D)
F) B) and D)

Question 16

If a chemotherapy drug prevents the mitotic spindle from forming during the M phase of the cell cycle,then what specific phase has been disrupted?

Accepted Answer

A)  metaphase
B)  prophase
C)  telophase
D)  anaphaseE) C) and D)
F) None of the above

Question 17

What is the role of RNA polymerase in transcription?

Accepted Answer

A)  RNA polymerase binds the DNA promoter and builds an mRNA molecule.
B)  RNA polymerase catalyzes the unwinding of the DNA double helix.
C)  RNA polymerase carries the code for the amino acid in a sequence of nucleotides.
D)  RNA polymerase signals the end of the mRNA molecule.E) A) and C)
F) A) and B)

Question 18

Which of the following components of the nucleus is composed of DNA?

Accepted Answer

A)  nuclear lamina
B)  nuclear pores
C)  chromatin
D)  nuclear envelopeE) A) and B)
F) C) and D)

Question 19

Erythromycin is an antibiotic that prevents the tRNA molecule from moving from the A site to the P site on the rRNA complex during translation in bacterial ribosomes.Predict the effects of this drug on protein synthesis.

Accepted Answer

Translation is the process in which the ...

Question 20

What is the role of DNA helicase during the S phase of interphase?

Accepted Answer

A)  DNA helicase builds RNA primers on the existing DNA strands.
B)  DNA helicase removes the RNA primer and replaces it with DNA.
C)  DNA helicase catalyzes the addition of nucleotides to the new DNA strands.
D)  DNA helicase unwinds the two strands of DNA.E) B) and D)
F) None of the above

Exam 3: The Cell

What is the role of DNA helicase during the S phase of interphase?

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Which of the following components of the nucleus is composed of DNA?

Correct AnswerverifiedShow Answer

If a chemotherapy drug prevents the mitotic spindle from forming during the M phase of the cell cycle,then what specific phase has been disrupted?

Correct AnswerverifiedShow Answer

Cancer cells: A)have a slower mitotic rate than normal body cells. B)do not spread into other body tissues. C)are indistinguishable from normal body cells. D)may exhibit metastasis.

Correct AnswerverifiedD ESSAY.Write your a...View AnswerShow Answer

Cellular swelling is likely to occur when blood cells are immersed in:

Correct AnswerverifiedShow Answer

Which of the following best describes secondary active transport?

Correct AnswerverifiedShow Answer

How many codons are present in the following strand of mRNA? U A C G G U A G U A U G

Correct AnswerverifiedShow Answer

Explain the roles of messenger and transfer RNA in protein synthesis.

Correct AnswerverifiedMessenger RNA (mRNA)is built from a temp...View AnswerShow Answer

Describe the role of the mitotic spindle during mitosis.

Correct AnswerverifiedThe mitotic spindle is a necessary struc...View AnswerShow Answer

Where does protein synthesis occur?

Correct AnswerverifiedShow Answer

What organelle degrades old,worn-out organelles and cell components?

Correct AnswerverifiedShow Answer

Resting membrane potential is due to unequal concentrations of:

Correct AnswerverifiedShow Answer

What is the role of RNA polymerase in transcription?

Correct AnswerverifiedShow Answer

The Na+/K+ pump transports three sodium ions out of the cell for every two potassium ions moved into the cell.This is an example of:

Correct AnswerverifiedShow Answer

Cells may lyse when placed into a hypertonic environment.

Correct AnswerverifiedShow Answer

Determine the differences between cell division of normal cells and that of cancer cells.

Correct AnswerverifiedNormal,noncancerous cells pass through c...View AnswerShow Answer

Aquaporins may be employed during:

Correct AnswerverifiedShow Answer

How many homologous chromosome pairs are present in most human cells?

Correct AnswerverifiedShow Answer

Erythromycin is an antibiotic that prevents the tRNA molecule from moving from the A site to the P site on the rRNA complex during translation in bacterial ribosomes.Predict the effects of this drug on protein synthesis.

Correct AnswerverifiedTranslation is the process in which the ...View AnswerShow Answer

A process that requires energy to move a substance against its concentration gradient is called:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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D ESSAY.Write your a...
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Correct Answer
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Correct Answer
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Correct Answer
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Messenger RNA (mRNA)is built from a temp...
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The mitotic spindle is a necessary struc...
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Correct Answer
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Correct Answer
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The Na⁺/K⁺pump transports three sodium ions out of the cell for every two potassium ions moved into the cell.This is an example of:

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Correct Answer
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Correct Answer
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Normal,noncancerous cells pass through c...
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Correct Answer
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Correct Answer
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Translation is the process in which the ...
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