Question 1

A helical section of myosin that moves dramatically when NTP is bound is called the ________.

Accepted Answer

The answer of A helical section of myosin that moves...

Question 2

How does the length of the lever arm affect the rate?

Accepted Answer

A)   A mutated shorter arm has a reduced rate.
B)   A mutated longer arm has a reduced rate.
C)   A mutated longer arm has a faster rate.
D)   A and B are correct.
E)   A and C are correct.F) A) and B)
G) All of the above

Question 3

Which of the following is a proteolytic fragment of muscle myosin?

Accepted Answer

A)   heavy chain
B)   S1
C)   P-loop NTPase
D)   EF-hand domain
E)    α\alphaα -meromyosin F) A) and E)
G) B) and E)

Question 4

What is the functional unit of a muscle cell?

Accepted Answer

A)   myosin
B)   actin
C)   mitochondria
D)   sarcomere
E)   None of the answers is correct.F) A) and D)
G) B) and E)

Question 5

Binding of ATP causes ______________.

Accepted Answer

A)   a decrease in kinesin affinity for microtubules
B)   an increase in kinesin affinity for microtubules
C)   no change in kinesin affinity for microtubules
D)   cross-linking of kinesin to microtubules
E)   kinesin to completely dissociate from microtubulesF) A) and E)
G) C) and E)

Question 6

What is the banding pattern observed in muscle cells?

Accepted Answer

Dark and light bands repeat and are call...

Question 7

Bacterial flagella rotate in one direction for smooth swimming and in the other direction to cause _______________.

Accepted Answer

The answer of Bacterial flagella rotate in one direction for...

Question 8

Which of the following is a prokaryotic protein similar to tubulin?

Accepted Answer

A)   troponin
B)   tubulin
C)   axoneme
D)   flagellin
E)   FtsZF) B) and D)
G) None of the above

Question 9

What was learned using the optical trap laser studies?

Accepted Answer

The studies indicated that myosin heads ...

Question 10

How is a bacterial motor similar to ATP synthase?

Accepted Answer

In both cases, a pro...

Question 11

Troponin reacts in response to the _______________ ion.

Accepted Answer

The answer of Troponin reacts in response to the _______________...

Question 12

Describe the experiment that supports the proposed role of the lever arm in myosin motor activity.

Accepted Answer

Investigators deleted sequences to short...

Question 13

Which of the following is a bundle of nine microtubule pairs surrounding two singlet microtubules?

Accepted Answer

A)   axoneme
B)   dynein
C)   Arp-actin
D)   tropomyosin
E)   None of the answers is correct.F) D) and E)
G) A) and B)

Question 14

Actin polymers will assemble

Accepted Answer

A)   automatically by self-assembly.
B)   only in the presence of myosin.
C)   with the aid of chaperone proteins.
D)   in the presence of GTP
E)   None of the answers is correct.F) A) and C)
G) D) and E)

Question 15

What are flagella used for in bacteria?

Accepted Answer

A)   chemostasis
B)   chemoselection
C)   chemokinesis
D)   chemotaxis
E)   chemoprotectionF) A) and D)
G) C) and E)

Question 16

Molecules that cause bacteria to swim away from toxic substances are

Accepted Answer

A)   cheomoattractants.
B)   chemotaxis.
C)   chemorepellants.
D)   hormones
E)   None of the answers is correct.F) A) and D)
G) B) and E)

Question 17

The structure of dynein lends itself to the formation of

Accepted Answer

A)   monomeric proteins.
B)   dimers.
C)   oligomers.
D)   dynein fibers.
E)   None of the answers is correct.F) D) and E)
G) None of the above

Question 18

What part of kinesin undergoes conformational change after nucleotide binding?

Accepted Answer

A)   head domain
B)   light chain
C)    α\alphaα -helical lever arm
D)   switch II
E)   neck linker F) C) and E)
G) A) and B)

Question 19

What is the "biased random walk" movement of bacteria, and when do they engage in this type of movement?

Accepted Answer

In the presence of a gradient of a chemo...

Question 20

What serves as the track for myosin?

Accepted Answer

F-actin, actin in it...

Exam 35: Molecular Motors

What is the functional unit of a muscle cell?

Correct AnswerverifiedShow Answer

How is a bacterial motor similar to ATP synthase?

Correct AnswerverifiedIn both cases, a pro...View AnswerShow Answer

Actin polymers will assemble

Correct AnswerverifiedShow Answer

Which of the following is a bundle of nine microtubule pairs surrounding two singlet microtubules?

Correct AnswerverifiedShow Answer

Describe the experiment that supports the proposed role of the lever arm in myosin motor activity.

Correct AnswerverifiedInvestigators deleted sequences to short...View AnswerShow Answer

Which of the following is a prokaryotic protein similar to tubulin?

Correct AnswerverifiedShow Answer

Bacterial flagella rotate in one direction for smooth swimming and in the other direction to cause _______________.

Correct AnswerverifiedShow Answer

The structure of dynein lends itself to the formation of

Correct AnswerverifiedShow Answer

What serves as the track for myosin?

Correct AnswerverifiedF-actin, actin in it...View AnswerShow Answer

What was learned using the optical trap laser studies?

Correct AnswerverifiedThe studies indicated that myosin heads ...View AnswerShow Answer

What is the "biased random walk" movement of bacteria, and when do they engage in this type of movement?

Correct AnswerverifiedIn the presence of a gradient of a chemo...View AnswerShow Answer

How does the length of the lever arm affect the rate?

Correct AnswerverifiedShow Answer

What are flagella used for in bacteria?

Correct AnswerverifiedShow Answer

Which of the following is a proteolytic fragment of muscle myosin?

Correct AnswerverifiedShow Answer

Binding of ATP causes ______________.

Correct AnswerverifiedShow Answer

What part of kinesin undergoes conformational change after nucleotide binding?

Correct AnswerverifiedShow Answer

What is the banding pattern observed in muscle cells?

Correct AnswerverifiedDark and light bands repeat and are call...View AnswerShow Answer

A helical section of myosin that moves dramatically when NTP is bound is called the ________.

Correct AnswerverifiedShow Answer

Molecules that cause bacteria to swim away from toxic substances are

Correct AnswerverifiedShow Answer

Troponin reacts in response to the _______________ ion.

Correct AnswerverifiedShow Answer

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In both cases, a pro...
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Correct Answer
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Correct Answer
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Correct Answer
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Investigators deleted sequences to short...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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F-actin, actin in it...
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Correct Answer
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The studies indicated that myosin heads ...
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Correct Answer
verified
In the presence of a gradient of a chemo...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Dark and light bands repeat and are call...
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Correct Answer
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Correct Answer
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Correct Answer
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