Question 1

The scientist(s) given credit for first using the term "cell" to describe the basic unit of life is (are)

Accepted Answer

A)  Mathias Schleiden and Theodore Schwann.
B)  Robert Hooke.
C)  Carl Woese.
D)  Rudolf Virchow.
E)  J.Craig Venter.F) B) and E)
G) A) and B)

Question 2

A phospholipid molecule

Accepted Answer

A)  has a hydrophilic head that is repelled by water.
B)  has hydrophilic tails that are repelled by water.
C)  has a hydrophilic head that is attracted to water.
D)  has a hydrophobic head that is repelled by water.
E)  has hydrophobic tails that are attracted to water.F) C) and E)
G) B) and D)

Question 3

Products of the rough and smooth endoplasmic reticulum are packaged in the ______ and sent to other locations in the cell or cell membrane in ______.

Accepted Answer

A)  Golgi apparatus;mitochondria
B)  Golgi apparatus;vesicles
C)  nucleus;chloroplasts
D)  chloroplasts;plastids
E)  nucleus;plastidsF) A) and E)
G) B) and C)

Question 4

The most prominent organelle in most eukaryotic cells is the

Accepted Answer

A)  endoplasmic reticulum.
B)  nucleus.
C)  ribosome.
D)  nucleolus.
E)  cell membranE.F) D) and E)
G) C) and E)

Question 5

Cells typically keep their surface to volume ratio low.If a cell was a cube and you doubled the height,width,and length of the cell,how much would the volume increase?

Accepted Answer

A)  2-fold
B)  8-fold
C)  It would stay the same.
D)  9-fold
E)  4-foldF) A) and E)
G) C) and D)

Question 6

All living things can be divided into one of three domains.

Accepted Answer

A) True 
 B)False

Question 7

In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",what fundamental question were the scientists examining?

Accepted Answer

A)  Where did the cytoskeleton proteins of eukaryotes originate?
B)  Where did the cytoskeleton proteins of prokaryotes and eukaryotes originate?
C)  Where did the nucleus of prokaryotes and eukaryotes originate?
D)  Where did the nucleus of eukaryotes originate?
E)  Where did the nucleus of prokaryotes originate?F) A) and B)
G) A) and C)

Question 8

In order for a milk protein to be secreted,it must be moved between organelles

Accepted Answer

A)  in spheres of lipid bilayer called vesicles.
B)  by release into the cytoplasm.
C)  All answers are correct.
D)  attached to transporter proteins.
E)  by the fusion of organelles with each other.F) A) and B)
G) A) and E)

Question 9

The Golgi apparatus is characterized by all of the following except that it is not

Accepted Answer

A)  an organelle.
B)  a processing center.
C)  studded with ribosomes.
D)  a stack of membrane enclosed sacs.
E)  involved with secretion of cellular components.F) A) and B)
G) A) and C)

Question 10

A structure found in prokaryotic cells,plant cells,and animal cells is a

Accepted Answer

A)  cell wall.
B)  chloroplast.
C)  ribosome.
D)  mitochondrion.
E)  cilium.F) None of the above
G) C) and E)

Question 11

The function not done in either the rough or smooth endoplasmic reticulum is to

Accepted Answer

A)  produce proteins.
B)  produce lipids.
C)  detoxify poisons.
D)  produce DNA.
E)  form vesicles for transport to the Golgi apparatus.F) A) and C)
G) D) and E)

Question 12

In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",scientific evidence suggested that some elements of the cytoskeleton may have originated in bacteria.

Accepted Answer

A) True 
 B)False

Question 13

A wild duck needs a steady supply of energy to fly for hours and therefore has dark breast meat.Domesticated chickens rarely fly and therefore require less energy and have white breast meat.You expect to find _____ in the breast muscles of wild ducks than domesticated chickens.

Accepted Answer

A)  fewer mitochondria
B)  more cytoplasm
C)  less cytoplasm
D)  more Golgi apparatuses
E)  more mitochondriaF) A) and D)
G) A) and E)

Question 14

You discover a new life form,and study it under an electron microscope.You find that it has no organelles,a peptidoglycan cell wall,and fatty acids in its plasma membrane.You conclude that the new life form is in domain

Accepted Answer

A)  BacteriA.
B)  Archaea.
C)  Eukarya.
D)  Protista.
E)  Animalia.F) A) and C)
G) A) and B)

Question 15

Tay-Sachs disease is a neurological disorder in which a defective enzyme prohibits the breakdown of phospholipids called gangliosides.Enzymes that break down molecules in a cell are typically found in which organelle?

Accepted Answer

A)  cytoplasm
B)  lysosomes
C)  endoplasmic reticulum
D)  Golgi apparatus
E)  mitochondriaF) B) and C)
G) A) and E)

Question 16

The main organelles and structures involved with milk production and secretion in their correct sequence are:

Accepted Answer

A)  nucleus,nuclear pore,rough ER,smooth ER,transport vesicle,Golgi body,and vesicle for secretion.
B)  nucleus,smooth ER,rough ER,nuclear pore,transport vesicle,Golgi body,and vesicle for secretion.
C)  nucleus,transport vesicle,rough ER,smooth ER,Golgi body,and vesicle for secretion.
D)  nucleus,nuclear pore,Golgi body,rough ER,transport vesicle,smooth ER,and vesicle for secretion.
E)  None of the answers are correct.F) D) and E)
G) C) and E)

Question 17

The phospholipid bilayer of membranes allows lipids and small,nonpolar molecules to pass across membranes,but prohibits the passage of ions and polar molecules.This occurs because the phospholipid tails are

Accepted Answer

A)  always saturated.
B)  hydrophilic and hydrophobic.
C)  always unsaturated.
D)  hydrophilic and selectively permeable.
E)  hydrophobic and selectively permeablE.F) A) and E)
G) A) and B)

Question 18

A cytoskeleton is

Accepted Answer

A)  a structure that aids in the process of cell division.
B)  found in the cytoplasm of eukaryotic cells.
C)  a system of tracks used for transport.
D)  composed of microtubules and microfilaments.
E)  All answers are correct.F) A) and E)
G) C) and D)

Question 19

Endosymbiosis is a theory based on the resemblance of chloroplasts and mitochondria to bacteria.

Accepted Answer

A) True 
 B)False

Question 20

What does a pine tree,an octopus,and a bacterium have in common at the microscopic level?

Accepted Answer

A)  nothing in common
B)  nuclei
C)  blood supply
D)  cancerous tissues
E)  cellular compositionF) A) and B)
G) B) and E)

Exam 3: Cells

Endosymbiosis is a theory based on the resemblance of chloroplasts and mitochondria to bacteria.

Correct AnswerverifiedShow Answer

The Golgi apparatus is characterized by all of the following except that it is not

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In order for a milk protein to be secreted,it must be moved between organelles

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You discover a new life form,and study it under an electron microscope.You find that it has no organelles,a peptidoglycan cell wall,and fatty acids in its plasma membrane.You conclude that the new life form is in domain

Correct AnswerverifiedShow Answer

A cytoskeleton is

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The function not done in either the rough or smooth endoplasmic reticulum is to

Correct AnswerverifiedShow Answer

Tay-Sachs disease is a neurological disorder in which a defective enzyme prohibits the breakdown of phospholipids called gangliosides.Enzymes that break down molecules in a cell are typically found in which organelle?

Correct AnswerverifiedShow Answer

The main organelles and structures involved with milk production and secretion in their correct sequence are:

Correct AnswerverifiedShow Answer

The phospholipid bilayer of membranes allows lipids and small,nonpolar molecules to pass across membranes,but prohibits the passage of ions and polar molecules.This occurs because the phospholipid tails are

Correct AnswerverifiedShow Answer

Products of the rough and smooth endoplasmic reticulum are packaged in the ______ and sent to other locations in the cell or cell membrane in ______.

Correct AnswerverifiedShow Answer

Cells typically keep their surface to volume ratio low.If a cell was a cube and you doubled the height,width,and length of the cell,how much would the volume increase?

Correct AnswerverifiedShow Answer

A structure found in prokaryotic cells,plant cells,and animal cells is a

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",what fundamental question were the scientists examining?

Correct AnswerverifiedShow Answer

A wild duck needs a steady supply of energy to fly for hours and therefore has dark breast meat.Domesticated chickens rarely fly and therefore require less energy and have white breast meat.You expect to find _____ in the breast muscles of wild ducks than domesticated chickens.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",scientific evidence suggested that some elements of the cytoskeleton may have originated in bacteria.

Correct AnswerverifiedShow Answer

A phospholipid molecule

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The most prominent organelle in most eukaryotic cells is the

Correct AnswerverifiedShow Answer

What does a pine tree,an octopus,and a bacterium have in common at the microscopic level?

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All living things can be divided into one of three domains.

Correct AnswerverifiedShow Answer

The scientist(s) given credit for first using the term "cell" to describe the basic unit of life is (are)

Correct AnswerverifiedShow Answer

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Products of the rough and smooth endoplasmic reticulum are packaged in the and sent to other locations in the cell or cell membrane in .

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