Question 1

If a cell lacked the enzyme DNA polymerase, it could not

Accepted Answer

A)   link segments of DNA together.
B)   form a new nuclear membrane during telophase.
C)   form complementary sequences of DNA.
D)   form protein.
E)   form spindle fibers.F) A) and B)
G) B) and E)

Question 2

Write out the term for rRNA.

Accepted Answer

ribosomal ...

Question 3

Membrane- bound proteins that use metabolic energy to move ions across the plasmalemma are called__________ .

Accepted Answer

The answer of Membrane- bound proteins that use metabolic energy...

Question 4

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

Accepted Answer

A)   diffusion.
B)   osmosis.
C)   facilitated transport.
D)   passive transport.
E)   active transport.F) A) and D)
G) D) and E)

Question 5

The triplet codes needed to specify a specific polypeptide chain are found in the

Accepted Answer

A)   cytoplasm.
B)   polypeptide itself.
C)   codon.
D)   gene.
E)   anticodon.F) All of the above
G) A) and B)

Question 6

Which of the following about a cell's resting transmembrane potential is false?

Accepted Answer

A)   represents potential energy
B)   inside slightly more negative than outside
C)   inside slightly more positive than outside
D)   controls muscular contraction and nervous signaling
E)   depends on separation of + and - chargesF) B) and E)
G) C) and D)

Question 7

Functions of the plasmalemma include all of the following, except

Accepted Answer

A)   separation of the cytoplasm from the extracellular fluid.
B)   structural support.
C)   sensitivity to chemical changes in the extracellular fluid.
D)   regulation of exchange of materials with the extracellular environment.
E)   thermal insulation.F) All of the above
G) C) and D)

Question 8

Intravenous injection of KCl could be fatal. Why?

Accepted Answer

Increasing the amount of potassium ion i...

Question 9

If the concentration of sodium chloride in the interstitial fluid surrounding cells decreases and the concentration of other solutes remains constant,

Accepted Answer

A)   the cells will not change.
B)   the fluid outside of the cells will become isotonic.
C)   the cells will shrink.
D)   the fluid outside of the cells will become hypertonic.
E)   the cells will swell.F) D) and E)
G) A) and D)

Question 10

The smallest living unit within the human body is

Accepted Answer

A)   the cell.
B)   an organ.
C)   a tissue.
D)   a protein.
E)   an organ system.F) A) and E)
G) B) and C)

Question 11

Which of the following about cytoplasm is false?

Accepted Answer

A)   semi- rigid texture
B)   includes cytosol
C)   extracellular fluid contains more protein
D)   the material that fills a cell
E)   includes cytoskeletonF) B) and D)
G) B) and E)

Question 12

An alternate term for tumor is

Accepted Answer

A)   cytoplasm.
B)   neoplasm.
C)   nucleoplasm.
D)   benign malignancy.
E)   primary metastasis.F) C) and D)
G) B) and D)

Question 13

Cell membranes are said to be_________ because they allow some substances to pass but not others.

Accepted Answer

selectivel...

Question 14

A mature red blood cell lacks a nucleus. Thus, it

Accepted Answer

A)   cannot make new proteins and will be worn out within a few months.
B)   can repair itself readily.
C)   is malformed.
D)   will be a long- lived cell.
E)   can only divide once more.F) A) and E)
G) C) and D)

Question 15

An) _____is a mutant of a regulatory gene that causes cancer

Accepted Answer

The answer of An) _____is a mutant of a regulatory...

Question 16

Compared to the extracellular fluid, cytosol contains

Accepted Answer

A)   a lower concentration of dissolved proteins.
B)   almost no lipids.
C)   almost no glycogen.
D)   a higher concentration of amino acids.
E)   a higher concentration of potassium ions.F) A) and E)
G) B) and D)

Question 17

The principal cations in our body fluids are ____ and____ .

Accepted Answer

A)   sodium; calcium
B)   sodium; chloride
C)   calcium; magnesium
D)   sodium; potassium
E)   chloride; bicarbonateF) A) and E)
G) A) and D)

Question 18

Write out the term for mRNA.

Accepted Answer

messenger ...

Question 19

The movement of oxygen from an area of high concentration to an area of low concentration is an example of

Accepted Answer

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

Question 20

Figure 3- 2 The Anatomy of a Representative Cell
Use Figure 3- 2 to answer the following questions) :
-The skin swells and puckers during a long bath. This suggests that bath water is an)  _____ fluid.

Accepted Answer

A)   hypotonic
B)   diffusion
C)   hypertonic
D)   toxic
E)   isotonicF) All of the above
G) A) and B)

Exam 3: The Cellular Level of Organization

An) _____is a mutant of a regulatory gene that causes cancer

Correct AnswerverifiedShow Answer

Which of the following about a cell's resting transmembrane potential is false?

Correct AnswerverifiedShow Answer

The smallest living unit within the human body is

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Compared to the extracellular fluid, cytosol contains

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The principal cations in our body fluids are ____ and____ .

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Write out the term for mRNA.

Correct Answerverifiedmessenger ...View AnswerShow Answer

Intravenous injection of KCl could be fatal. Why?

Correct AnswerverifiedIncreasing the amount of potassium ion i...View AnswerShow Answer

If the concentration of sodium chloride in the interstitial fluid surrounding cells decreases and the concentration of other solutes remains constant,

Correct AnswerverifiedShow Answer

Which of the following about cytoplasm is false?

Correct AnswerverifiedShow Answer

Membrane- bound proteins that use metabolic energy to move ions across the plasmalemma are called__________ .

Correct AnswerverifiedShow Answer

The triplet codes needed to specify a specific polypeptide chain are found in the

Correct AnswerverifiedShow Answer

A mature red blood cell lacks a nucleus. Thus, it

Correct AnswerverifiedShow Answer

Write out the term for rRNA.

Correct Answerverifiedribosomal ...View AnswerShow Answer

The movement of oxygen from an area of high concentration to an area of low concentration is an example of

Correct AnswerverifiedShow Answer

Functions of the plasmalemma include all of the following, except

Correct AnswerverifiedShow Answer

Figure 3- 2 The Anatomy of a Representative Cell Use Figure 3- 2 to answer the following questions) : -The skin swells and puckers during a long bath. This suggests that bath water is an) _____ fluid.

Correct AnswerverifiedShow Answer

Cell membranes are said to be_________ because they allow some substances to pass but not others.

Correct Answerverifiedselectivel...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

If a cell lacked the enzyme DNA polymerase, it could not

Correct AnswerverifiedShow Answer

An alternate term for tumor is

Correct AnswerverifiedShow Answer

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The principal cations in our body fluids are and .

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messenger ...
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Increasing the amount of potassium ion i...
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ribosomal ...
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selectivel...
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