Question 1

Which of the following does not utilize active transport?

Accepted Answer

A)   movement of oxygen from the lungs into the blood
B)   concentrating iodine ions in the thyroid gland
C)   absorbing sugar in the gut
D)   water homeostasis in the kidneys
E)   movement of sodium and potassium in nerve cellsF) C) and E)
G) A) and D)

Question 2

A malfunction with the microtubules would interfere with mitosis and meiosis.

Accepted Answer

A) True 
 B)False

Question 3

In the fluid-mosaic model of the plasma membrane, the phospholipid molecules are oriented so that the _____________ heads are facing the outside environment and the ________________ tails are facing the interior of the membrane.

Accepted Answer

A)   hydrophobic, hydrophilic
B)   hydrophilic, hydrophobic
C)   autotrophic, heterotrophic
D)   heterotrophic, autotrophic
E)   ectothermic, endothermicF) C) and D)
G) C) and E)

Question 4

Sheree observed an amoeba feeding by engulfing the prey with its false feet or pseudopods. This process is known as

Accepted Answer

A)   pinocytosis.
B)   phagocytosis.
C)   exocytosis.
D)   facilitated transport.
E)   osmosis.F) B) and E)
G) A) and D)

Question 5

Since all organisms carry on cellular respiration, all living cells must contain mitochondria.

Accepted Answer

A) True 
 B)False

Question 6

Explain what occurs during endocytosis.

Accepted Answer

During endocytosis a portion of the plas...

Question 7

How large is a nuclear pore in the nuclear envelope?

Accepted Answer

A)   larger than a ribosome
B)   larger than the Golgi apparatus
C)   larger than the endoplasmic reticulum
D)   smaller than a ribosome
E)   smaller than a proteinF) C) and D)
G) A) and E)

Question 8

Often when a person is admitted to the hospital, an intravenous solution of normal saline is begun. Since this does not harm the patient, what is the tonicity of normal saline compared to your blood?

Accepted Answer

A)   hypertonic
B)   isotonic
C)   hypotonic
D)   pretonic
E)   osmotonicF) B) and D)
G) B) and C)

Question 9

If a cell lacked ribosomes, it would not be able to

Accepted Answer

A)   form a spindle apparatus.
B)   synthesize proteins.
C)   respire oxidatively.
D)   break down fats.
E)   produce ATP.F) None of the above
G) C) and E)

Question 10

The grainy-looking substance inside the nucleus is composed of

Accepted Answer

A)   phospholipids.
B)   DNA and proteins.
C)   nucleoplasm.
D)   ribosomes.
E)   mitochondria.F) B) and C)
G) A) and B)

Question 11

In a metabolic pathway, substrate Z is broken down to form product Y and X. Y is further broken down into products V and W. How many enzymes are required for this metabolic pathway?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   fiveF) B) and E)
G) A) and B)

Question 12

In the sodium potassium pump, sodium and potassium are both pumped out of the cell via active transport.

Accepted Answer

A) True 
 B)False

Question 13

The phospholipid bilayer that surrounds/maintains the integrity of a cell is called a

Accepted Answer

A)   plasma membrane.
B)   Sanger enclosure.
C)   hydrophobic membrane.
D)   dialysis membrane.
E)   mosaic membrane.F) None of the above
G) A) and D)

Question 14

Why is glycolysis believed to have evolved early in the history of life?

Accepted Answer

A)   It breaks down sugar.
B)   It produces energy.
C)   It is present in most every type of cell.
D)   It does not require oxygen.
E)   It splits a 6-carbon molecule into two 3-carbon molecules.F) None of the above
G) D) and E)

Question 15

During exocytosis, the phospholipids present in the vesicle membrane will end up in the plasma membrane.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following would be a way of finishing this hypothesis about the function of the Golgi apparatus? If the Golgi apparatus is involved in packaging products for secretion, then

Accepted Answer

A)   vesicles must travel from the Golgi to the cell surface.
B)   vesicles must travel from the RER and SER to the Golgi apparatus.
C)   the Golgi apparatus must be part of the endomembrane system.
D)   the Golgi apparatus must consist of 3 to 20 slightly curved sacs.
E)   the Golgi apparatus would contain proteins.F) C) and D)
G) None of the above

Question 17

Cilia are composed of microtubules while flagella are composed of actin filaments.

Accepted Answer

A) True 
 B)False

Question 18

The plasma membrane contains how many layers of phospholipids?

Accepted Answer

A)   one
B)   two
C)   four
D)   eight
E)   sixteenF) A) and D)
G) A) and E)

Question 19

Which of the following processes moves large molecules across a membrane in the opposite direction of the others?

Accepted Answer

A)   exocytosis
B)   phagocytosis
C)   pinocytosis
D)   receptor-mediated endocytosis
E)   endocytosisF) D) and E)
G) C) and D)

Question 20

The light microscope has a resolving power of

Accepted Answer

A)   0.1 mm.
B)   0.01 mm.
C)   0.0001 mm.
D)   0.000001 mm.
E)   0.00000001 mm.F) A) and B)
G) C) and D)

Exam 3: Cell Structure and Function

Explain what occurs during endocytosis.

Correct AnswerverifiedDuring endocytosis a portion of the plas...View AnswerShow Answer

A malfunction with the microtubules would interfere with mitosis and meiosis.

Correct AnswerverifiedShow Answer

In a metabolic pathway, substrate Z is broken down to form product Y and X. Y is further broken down into products V and W. How many enzymes are required for this metabolic pathway?

Correct AnswerverifiedShow Answer

How large is a nuclear pore in the nuclear envelope?

Correct AnswerverifiedShow Answer

The plasma membrane contains how many layers of phospholipids?

Correct AnswerverifiedShow Answer

In the fluid-mosaic model of the plasma membrane, the phospholipid molecules are oriented so that the _____________ heads are facing the outside environment and the ________________ tails are facing the interior of the membrane.

Correct AnswerverifiedShow Answer

Since all organisms carry on cellular respiration, all living cells must contain mitochondria.

Correct AnswerverifiedShow Answer

Often when a person is admitted to the hospital, an intravenous solution of normal saline is begun. Since this does not harm the patient, what is the tonicity of normal saline compared to your blood?

Correct AnswerverifiedShow Answer

During exocytosis, the phospholipids present in the vesicle membrane will end up in the plasma membrane.

Correct AnswerverifiedShow Answer

The light microscope has a resolving power of

Correct AnswerverifiedShow Answer

Which of the following would be a way of finishing this hypothesis about the function of the Golgi apparatus? If the Golgi apparatus is involved in packaging products for secretion, then

Correct AnswerverifiedShow Answer

In the sodium potassium pump, sodium and potassium are both pumped out of the cell via active transport.

Correct AnswerverifiedShow Answer

Why is glycolysis believed to have evolved early in the history of life?

Correct AnswerverifiedShow Answer

If a cell lacked ribosomes, it would not be able to

Correct AnswerverifiedShow Answer

Which of the following processes moves large molecules across a membrane in the opposite direction of the others?

Correct AnswerverifiedShow Answer

Cilia are composed of microtubules while flagella are composed of actin filaments.

Correct AnswerverifiedShow Answer

The phospholipid bilayer that surrounds/maintains the integrity of a cell is called a

Correct AnswerverifiedShow Answer

Sheree observed an amoeba feeding by engulfing the prey with its false feet or pseudopods. This process is known as

Correct AnswerverifiedShow Answer

Which of the following does not utilize active transport?

Correct AnswerverifiedShow Answer

The grainy-looking substance inside the nucleus is composed of

Correct AnswerverifiedShow Answer

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During endocytosis a portion of the plas...
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In the fluid-mosaic model of the plasma membrane, the phospholipid molecules are oriented so that the _ heads are facing the outside environment and the ____ tails are facing the interior of the membrane.

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