Question 1

Which of the following is NOT posttranslational processing?

Accepted Answer

A)   Adding polysaccharide side chains to proteins
B)   Joining 2 or more amino acid chains
C)   Conversion of a pro-protein to a functional protein
D)   Removal of introns from pre-mRNA
E)   Conversion of a pro-enzyme to a functional enzymeF) C) and E)
G) B) and D)

Question 2

Protein A is composed of 312 amino acids. Based on this information, which of the following statements is correct?

Accepted Answer

A)   The gene coding for Protein A is composed of at least 936 DNA nucleotides.
B)   The mRNA coding for Protein A is composed of at least 936 DNA nucleotides.
C)   The gene coding for Protein A is composed of at least 316 RNA nucleotides.
D)   Both "The gene coding for Protein A is composed of at least 936 DNA nucleotides" and "The mRNA coding for Protein A is composed of at least 936 DNA nucleotides" are correct.E) C) and D)
F) B) and C)

Question 3

Cytokinesis is completed at the end of this phase.

Accepted Answer

A)   Interphase
B)   Prophase
C)   Metaphase
D)   Anaphase
E)   TelophaseF) B) and E)
G) A) and B)

Question 4

Arrange the following in correct sequence:
(1)  Protein moves through ER and then carried in vesicles to Golgi apparatus
(2)  Vesicle pinches off from the Golgi apparatus and carries product to plasma membrane
(3)  Golgi apparatus modifies protein and then packages them into vesicles
(4)  Protein made by ribosomes on rough ER

Accepted Answer

A)   1, 2, 3, 4
B)   4, 1, 3, 2
C)   2, 3, 1, 4
D)   3, 2, 4, 1
E)   4, 3, 2, 1F) C) and E)
G) A) and D)

Question 5

Molecules that serve as chemical signals to open or close gated ion channels are ________.

Accepted Answer

A)   isotopes
B)   ligands
C)   responders
D)   communicators
E)   membrane potentialsF) B) and D)
G) C) and E)

Question 6

-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 "A"?

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) D) and E)
G) B) and D)

Question 7

Which of the following correctly matches a nuclear structure with its function?

Accepted Answer

A)   Chromosomes - contains RNA and histones
B)   Nuclear envelope - contains the nucleolar organizer
C)   Nuclear pores - allow molecules to move between the nucleus and cytoplasm
D)   Chromatin - fluid portion of the nucleus
E)   Nucleolus - DNA synthesisF) A) and D)
G) D) and E)

Question 8

The fluid-mosaic model of the plasma membrane suggests that

Accepted Answer

A)   cholesterol forms the outermost layer of the membrane.
B)   proteins form a "liquid" sea in the membrane.
C)   phospholipids form a single lipid layer in the center of the membrane.
D)   the membrane is neither rigid nor static in structure.
E)   proteins are not a part of the membrane.F) A) and D)
G) A) and C)

Question 9

When a person trains for running long distances, which of the following organelles increase in number in his/her muscles?

Accepted Answer

A)   Rough endoplasmic reticulum
B)   Enzymes for glycolysis
C)   Basal bodies
D)   Lysosomes
E)   MitochondriaF) A) and E)
G) C) and E)

Question 10

Which of the following would increase the rate of mediated transport?

Accepted Answer

A)   Increase the number of available carrier molecules
B)   Change the shape of the binding site on the carrier molecule
C)   Increase the number of competitive molecules
D)   Fill all binding sites on carrier molecules
E)   Remove the binding site on the carrier moleculeF) A) and D)
G) A) and C)

Exam 3: Cell Biology

Correct Answer
verified

Which of the following correctly matches a nuclear structure with its function?

Correct Answer
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Which of the following would increase the rate of mediated transport?

Correct Answer
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When a person trains for running long distances, which of the following organelles increase in number in his/her muscles?

Correct Answer
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Cytokinesis is completed at the end of this phase.

Correct Answer
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The fluid-mosaic model of the plasma membrane suggests that

Correct Answer
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Which of the following is NOT posttranslational processing?

Correct Answer
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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 "A"?

Correct Answer
verified

Protein A is composed of 312 amino acids. Based on this information, which of the following statements is correct?

Correct Answer
verified

Molecules that serve as chemical signals to open or close gated ion channels are ________.

Correct Answer
verified

Exam 3: Cell Biology

Correct AnswerverifiedShow Answer

Which of the following correctly matches a nuclear structure with its function?

Correct AnswerverifiedShow Answer

Which of the following would increase the rate of mediated transport?

Correct AnswerverifiedShow Answer

When a person trains for running long distances, which of the following organelles increase in number in his/her muscles?

Correct AnswerverifiedShow Answer

Cytokinesis is completed at the end of this phase.

Correct AnswerverifiedShow Answer

The fluid-mosaic model of the plasma membrane suggests that

Correct AnswerverifiedShow Answer

Which of the following is NOT posttranslational processing?

Correct AnswerverifiedShow Answer

-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 "A"?

Correct AnswerverifiedShow Answer

Protein A is composed of 312 amino acids. Based on this information, which of the following statements is correct?

Correct AnswerverifiedShow Answer

Molecules that serve as chemical signals to open or close gated ion channels are ________.

Correct AnswerverifiedShow Answer

Correct Answer
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