Question 1

What do the SER and RER have in common?

Accepted Answer

A)   the presence of ribosomes
B)   the formation of transport vesicles
C)   the synthesis of phospholipids
D)   the synthesis of proteins
E)   the processing and modification of proteinsF) A) and B)
G) B) and E)

Question 2

The reason that metabolizing cells are small in size is because

Accepted Answer

A)   cells influence nearby cells to divide.
B)   the surface area of a cell must be able to accomplish nutrient/waste exchange.
C)   cells need to dissipate heat effectively.
D)   mitosis occurs before cells reach a certain size.
E)   cells need to communicate with adjacent cells.F) None of the above
G) A) and B)

Question 3

In a metabolic pathway, substrate Z is broken down to form products 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) A) and D)
G) D) and E)

Question 4

Which of the following steps in the breakdown of glucose directly requires the use of oxygen?

Accepted Answer

A)   glycolysis
B)   citric acid cycle
C)   electron transport chain
D)   acetyl CoA conversion
E)   None of these require oxygen.F) C) and D)
G) A) and C) C

Question 5

The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what?

Accepted Answer

A)   diffusion
B)   facilitated transport
C)   active transport
D)   osmosis
E)   crenationF) C) and D)
G) B) and C)

Question 6

Which of the following structures are present in both eukaryotes and prokaryotes?

Accepted Answer

A)   plasma membrane
B)   nucleus
C)   endoplasmic reticulum
D)   Golgi body
E)   mitochondriaF) C) and D)
G) A) and C)

Question 7

All of the following are possible origins of cell organelles in eukaryotes EXCEPT

Accepted Answer

A)   invagination of the plasma membrane to form endoplasmic reticulum.
B)   incorporation of engulfed heterotrophic bacteria to form mitochondria.
C)   incorporation of engulfed autotrophic cyanobacteria to form chloroplasts.
D)   a symbiotic relationship between a host cell and a prokaryote that was taken up but not destroyed.
E)   groups of prokaryotic cells begin to live in a small group sharing products of metabolism.F) C) and D)
G) A) and B)

Question 8

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) All of the above B

Question 9

Which model currently describes the structure of the plasma membrane?

Accepted Answer

A)   endosymbiont model
B)   fluid-mosaic model
C)   plasmagel-plasmasol model
D)   lock and key model
E)   induced-fit modelF) D) and E)
G) A) and E)

Question 10

If you could remove all the phosphate in the cell, what would happen to the ATP cycle?

Accepted Answer

A)   It would stop when all the ATP had been converted into ADP.
B)   It would stop when all the ADP had been converted into ATP.
C)   It would cycle faster because the lack of phosphate would drive the cycle.
D)   It would cycle faster because of the buildup of ATP.
E)   It would not affect the ATP cycle.F) B) and C)
G) A) and E)

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

Biologists classify cells into two broad categories- animals and plants.

Accepted Answer

A) True 
 B)False

Question 13

Because bacteria are prokaryotes, they do not have DNA.

Accepted Answer

A) True 
 B)False

Question 14

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) None of the above
G) C) and D) B

Question 15

A short chain of sugar attached to a protein molecule on the plasma membrane is called

Accepted Answer

A)   a protomembrane.
B)   a protosugar.
C)   a glycocalyx.
D)   a glycolipid.
E)   a glycoprotein.F) D) and E)
G) C) and D)

Question 16

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 17

The nucleus of a cell in your thigh muscle contains the same genes as the nucleus of a cell in your brain.

Accepted Answer

A) True 
 B)False

Question 18

Which organelle can be likened to a post office?

Accepted Answer

A)   nucleus
B)   nucleolus
C)   mitochondria
D)   endoplasmic reticulum
E)   Golgi apparatusF) C) and E)
G) B) and D)

Question 19

Which type of junctions must there be between cells to form a barrier?

Accepted Answer

A)   adhesion junctions
B)   gap junctions
C)   tight junctions
D)   channel junctions
E)   free junctionsF) B) and E)
G) B) and D)

Question 20

The sum of all of the chemical reactions that occur in a cell collectively are called

Accepted Answer

A)   respiration.
B)   anabolism.
C)   photosynthesis.
D)   metabolism.
E)   reaction summary.F) A) and B)
G) A) and E)

Exam 3: Cell Structure and Function

What do the SER and RER have in common?

Correct AnswerverifiedShow Answer

The reason that metabolizing cells are small in size is because

Correct AnswerverifiedShow Answer

In a metabolic pathway, substrate Z is broken down to form products 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

Which of the following steps in the breakdown of glucose directly requires the use of oxygen?

Correct AnswerverifiedC

The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what?

Correct AnswerverifiedShow Answer

Which of the following structures are present in both eukaryotes and prokaryotes?

Correct AnswerverifiedShow Answer

All of the following are possible origins of cell organelles in eukaryotes EXCEPT

Correct AnswerverifiedShow Answer

The plasma membrane contains how many layers of phospholipids?

Correct AnswerverifiedB

Which model currently describes the structure of the plasma membrane?

Correct AnswerverifiedShow Answer

If you could remove all the phosphate in the cell, what would happen to the ATP cycle?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Biologists classify cells into two broad categories- animals and plants.

Correct AnswerverifiedShow Answer

Because bacteria are prokaryotes, they do not have DNA.

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 AnswerverifiedB

A short chain of sugar attached to a protein molecule on the plasma membrane is called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The nucleus of a cell in your thigh muscle contains the same genes as the nucleus of a cell in your brain.

Correct AnswerverifiedShow Answer

Which organelle can be likened to a post office?

Correct AnswerverifiedShow Answer

Which type of junctions must there be between cells to form a barrier?

Correct AnswerverifiedShow Answer

The sum of all of the chemical reactions that occur in a cell collectively are called

Correct AnswerverifiedShow Answer

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C

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B

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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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B

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