Question 1

If all of the peroxisomes in a cell were suddenly removed, how would this affect the cell's function?

Accepted Answer

A)   The cell would no longer be able to break down glucose.
B)   The cell would be unable to produce proteins.
C)   The cell would be unable to perform transcription.
D)   The cell would no longer be able to break down fatty acids, hydrogen peroxide, and amino acids.
E)   The cell would no longer be able to break down proteins and nucleic acids.F) B) and D)
G) B) and E)

Question 2

In ________, carrier molecules move a substance against (up)  its concentration gradient.

Accepted Answer

A)   simple diffusion
B)   exocytosis
C)   facilitated diffusion
D)   active transport
E)   endocytosisF) None of the above
G) B) and E)

Question 3

What is membrane potential?

Accepted Answer

A)   The electrical charge difference across the plasma membrane resulting from differences in ion concentrations inside and outside the cell
B)   The ability of a membrane to actively transport carbohydrates out of the cytoplasm
C)   The rate of ATP production and transport by mitochondria
D)   The ability of molecules to pass through the nuclear envelopeE) B) and C)
F) None of the above

Question 4

The predominant lipid in the cell membrane is a ________.

Accepted Answer

A)   phospholipid
B)   glycolipid
C)   cholesterol
D)   prostaglandin
E)   triglycerideF) A) and E)
G) A) and B)

Question 5

A person suffered burns over a large part of his body. Evaporation of fluid from the surface of burned areas occurs. As a result of the evaporation process, cells will tend to

Accepted Answer

A)   shrink.
B)   swell.
C)   rupture.
D)   first swell and then resume their original shape.
E)   remain unchanged.F) C) and D)
G) A) and B)

Question 6

The second most abundant of the lipids in the plasma membrane is/are ________.

Accepted Answer

A)   glycolipids
B)   saturated fats
C)   cholesterol
D)   phospholipids
E)   triglyceridesF) All of the above
G) A) and C)

Question 7

Which of the following are ciliated cells?

Accepted Answer

A)   Columnar cells of upper respiratory tract
B)   Sperm cells
C)   Columnar cells of small intestine
D)   Red blood cells
E)   Macrophage (large, mobile white blood cell) F) C) and E)
G) B) and D)

Question 8

Which of the following cell structures is CORRECTLY matched with its function?

Accepted Answer

A)   Nucleolus - contains the genetic material of the cell
B)   Microtubules - cell support
C)   Mitochondria - protein synthesis
D)   Smooth ER - ATP production
E)   Ribosome - energy productionF) B) and C)
G) A) and E)

Question 9

-Red blood cells (RBCs)  have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "C" relative to the RBC?

Accepted Answer

A)   Hypotonic solution
B)   Hypertonic solution
C)   Isotonic solutionD) A) and B)
E) A) and C)

Question 10

Microvilli

Accepted Answer

A)   are extensions of the lysosomal membrane.
B)   function to make the cell mobile.
C)   are supported by microtubules.
D)   move the cell.
E)   increase the surface area of the cell.F) A) and D)
G) All of the above

Question 11

Endoplasmic reticulum with ribosomes attached to it is called ________ ER.

Accepted Answer

A)   smooth
B)   dendritic
C)   nodular
D)   bumpy
E)   roughF) A) and D)
G) B) and D)

Question 12

-Answer these questions about chromosome structure. What does "C" represent?

Accepted Answer

A)   Chromatid
B)   Proteins
C)   Chromosome
D)   Centromere
E)   ChromatinF) A) and D)
G) A) and C)

Question 13

The plasma membrane is selectively permeable. This means

Accepted Answer

A)   only gases and water can pass through it.
B)   substances need permission to pass through it.
C)   only certain substances can pass through it.
D)   substances need carrier molecules to pass through it.
E)   ATP is always needed to move molecules across the plasma membrane.F) B) and D)
G) A) and E)

Question 14

Salt was added to a beaker of distilled water (the water was not stirred) . A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

Accepted Answer

A)   the difference in the percentage of salt between the top and bottom samples would increase.
B)   the percentage of salt in the top and bottom samples would be approximately equal.
C)   the samples would still be 2% and 20% respectively.
D)   the salt would float to the top.
E)   None of the choices are correct.F) C) and D)
G) All of the above

Question 15

The organelles involved with organization of the spindle fibers are the ________.

Accepted Answer

A)   nuclei
B)   ribosomes
C)   lysosomes
D)   mitochondria
E)   centriolesF) A) and E)
G) B) and D)

Question 16

Which molecule(s)  cause(s)  a portion of a DNA molecule to unwind for transcription?

Accepted Answer

A)   RNA ploymerase
B)   Transcription factors
C)   Spliceosomes
D)   Poly-A tail
E)   7-methylguanosine capF) C) and D)
G) A) and D)

Question 17

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "E"?

Accepted Answer

A)   Directs cellular activities, contains DNA
B)   Contains digestive enzymes
C)   Outer boundary of cell, controls entry and exit of substances
D)   Major site of ATP synthesis when oxygen is available
E)   Site of protein synthesisF) B) and E)
G) C) and D)

Question 18

A DNA nucleotide sequence that signals the beginning of a gene is called a ________.

Accepted Answer

A)   transcription factor
B)   promoter
C)   triplet
D)   terminator
E)   RNA polymeraseF) None of the above
G) A) and D)

Question 19

-What structure does "C" represent on the diagram of the plasma membrane?

Accepted Answer

A)   Membrane channel protein
B)   Phospholipid bilayer
C)   Internal membrane surface
D)   Peripheral protein
E)   Integral proteinF) A) and E)
G) A) and B)

Question 20

Receptor-mediated endocytosis

Accepted Answer

A)   does not need ATP; the receptors supply the energy.
B)   exhibits specificity.
C)   occurs if oxygen is available.
D)   is a type of passive transport.
E)   moves materials out of the cell.F) B) and E)
G) B) and D)

Exam 3: Cell Biology

The plasma membrane is selectively permeable. This means

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If all of the peroxisomes in a cell were suddenly removed, how would this affect the cell's function?

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In ________, carrier molecules move a substance against (up) its concentration gradient.

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The second most abundant of the lipids in the plasma membrane is/are ________.

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Salt was added to a beaker of distilled water (the water was not stirred) . A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

Correct AnswerverifiedShow Answer

Endoplasmic reticulum with ribosomes attached to it is called ________ ER.

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The organelles involved with organization of the spindle fibers are the ________.

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-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "C" relative to the RBC?

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Receptor-mediated endocytosis

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-Answer these questions about chromosome structure. What does "C" represent?

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A person suffered burns over a large part of his body. Evaporation of fluid from the surface of burned areas occurs. As a result of the evaporation process, cells will tend to

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A DNA nucleotide sequence that signals the beginning of a gene is called a ________.

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What is membrane potential?

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-What structure does "C" represent on the diagram of the plasma membrane?

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Which of the following cell structures is CORRECTLY matched with its function?

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Which molecule(s) cause(s) a portion of a DNA molecule to unwind for transcription?

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Microvilli

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-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "E"?

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The predominant lipid in the cell membrane is a ________.

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Which of the following are ciliated cells?

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