Question 1

Figure 3-1 The Plasma membrane

Use Figure 3-1 to answer the following questions.
-Which structure has a "gate" to control transport?

Accepted Answer

A)   1
B)   2
C)   4
D)   7
E)   8

Question 2

The "t" in tRNA stands for

Accepted Answer

A)   translate.
B)   transport.
C)   transfer.
D)   transcribe.
E)   transmit.

Question 3

What organelles would be enhanced in a cell that produces digestive enzymes and secretes them into the intestine? Why?

Accepted Answer

Digestive enzymes are proteins, and they...

Question 4

The stage in a cell's life cycle in which the cell performs its normal functions and prepares for divisionis called

Accepted Answer

A)   prophase.
B)   metaphase.
C)   interphase.
D)   telophase.
E)   anaphase.

Question 5

Peroxisomes

Accepted Answer

A)   both generate and break down hydrogen peroxide.
B)   pull the chromosomes toward the poles of a dividing cell.
C)   manufacture proteins.
D)   manufacture most of a cell's ATP.
E)   contain the genetic information of a cell.

Question 6

The tails of a phospholipid molecule in a plasma membrane are

Accepted Answer

A)   hydrophilic.
B)   composed of amino acids.
C)   hydrophobic.
D)   facing the cytosol.
E)   interlocked to provide membrane strength.

Question 7

A defense cell engulfing a bacterium illustrates

Accepted Answer

A)   pinocytosis.
B)   receptor-mediated exocytosis.
C)   exocytosis.
D)   phagocytosis.
E)   receptor-mediated endocytosis.

Question 8

The process by which molecules such as glucose are moved into cells along their concentration gradientwith the help of membrane-bound carrier proteins is called

Accepted Answer

A)   osmosis.
B)   facilitated diffusion.
C)   active transport.
D)   endocytosis.
E)   exocytosis.

Question 9

Proteins of the plasma membrane carry out all of the following functions except

Accepted Answer

A)   binding to DNA to turn on genes.
B)   sending and receiving signals to and from other cells.
C)   transporting substances across the membrane.
D)   anchoring the cell to external structures.
E)   catalyzing chemical reactions at the inner or outer surface of the membrane.

Question 10

The endoplasmic reticulum is an example of a(n)  ________ organelle.

Accepted Answer

A)   filamentous
B)   extracellular
C)   interstitial
D)   membranous
E)   bound

Question 11

The process of protein formation directed by mRNA is called

Accepted Answer

A)   replication.
B)   transcription.
C)   translation.
D)   mitosis.
E)   auscultation.

Question 12

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

Accepted Answer

A)   maintain the integrity of the nuclear envelope.
B)   form complementary strands of DNA during replication.
C)   link segments of DNA together.
D)   form spindle fibers.
E)   form a new nuclear membrane during telophase.

Question 13

Assume that the import of a particular amino acid across the plasma membrane is observed (1)  to occur onlydown its concentration gradient and (2)  to slow when a different but similar amino acid is added to the extracellular fluid. The movement of the amino acid through the membrane is most likely by

Accepted Answer

A)   osmosis.
B)   diffusion.
C)   facilitated diffusion.
D)   active transport.
E)   pinocytosis.

Question 14

________ are responsible for identifying and digesting damaged or denatured proteins.

Accepted Answer

A)   Peroxisomes
B)   Proteasomes
C)   Lysosomes
D)   Endosomes
E)   Nucleosomes

Question 15

The control center for cellular operations is the

Accepted Answer

A)   nucleus.
B)   mitochondria.
C)   Golgi apparatus.
D)   endoplasmic reticulum.
E)   ribosome.

Question 16

The extracellular fluid in most tissues is called ________ fluid.

Accepted Answer

A)   interstitial
B)   cytosolic
C)   cytoplasmic
D)   outside
E)   peripheral

Question 17

________ is a mutated regulatory gene that causes cancer.

Accepted Answer

A)   neogene
B)   plasmogene
C)   toxogene
D)   oncogene
E)   monogene

Question 18

The "m" in mRNA stands for

Accepted Answer

A)   messenger.
B)   modifier.
C)   metabolic.
D)   molecular.
E)   matching.

Question 19

Many proteins in the cytosol are ________ that accelerate metabolic reactions.

Accepted Answer

A)   carbohydrates
B)   enzymes
C)   lipids
D)   messengers
E)   ions

Question 20

Most of the ATP required to power cellular operations is produced in the

Accepted Answer

A)   cytoplasm.
B)   endoplasmic reticulum.
C)   nucleus.
D)   mitochondria.
E)   cilia.

Exam 3: The Cellular Level of Organization

Most of the ATP required to power cellular operations is produced in the

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A defense cell engulfing a bacterium illustrates

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________ are responsible for identifying and digesting damaged or denatured proteins.

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What organelles would be enhanced in a cell that produces digestive enzymes and secretes them into the intestine? Why?

Correct AnswerverifiedDigestive enzymes are proteins, and they...View AnswerShow Answer

The tails of a phospholipid molecule in a plasma membrane are

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The "m" in mRNA stands for

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The "t" in tRNA stands for

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The extracellular fluid in most tissues is called ________ fluid.

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Proteins of the plasma membrane carry out all of the following functions except

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The stage in a cell's life cycle in which the cell performs its normal functions and prepares for divisionis called

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

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Many proteins in the cytosol are ________ that accelerate metabolic reactions.

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The process of protein formation directed by mRNA is called

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Correct AnswerverifiedShow Answer

The control center for cellular operations is the

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The endoplasmic reticulum is an example of a(n) ________ organelle.

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Peroxisomes

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Figure 3-1 The Plasma membrane Use Figure 3-1 to answer the following questions. -Which structure has a "gate" to control transport?

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________ is a mutated regulatory gene that causes cancer.

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The process by which molecules such as glucose are moved into cells along their concentration gradientwith the help of membrane-bound carrier proteins is called

Correct AnswerverifiedShow Answer

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Digestive enzymes are proteins, and they...
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