Question 1

Generally free ribosomes make proteins that will be secreted from the cell.

Accepted Answer

A) True 
 B)False

Question 2

Which cell extension is a long whip-like structure?

Accepted Answer

A)   Microvilli
B)   Flagellum
C)   Centrosomes
D)   CiliaE) B) and C)
F) A) and D) B

Question 3

A transport protein can generally transport many different types of substances.

Accepted Answer

A) True 
 B)False

Question 4

Once an equilibrium is established from a concentration gradient, there is not more movement of molecules.

Accepted Answer

A) True 
 B)False

Question 5

In a solution of sugar and water, which of the following is true?

Accepted Answer

A)   Sugar is the solvent and water is the solution
B)   Sugar is the solute and water is the solvent
C)   Sugar is the solvent and water is the solute
D)   Sugar and water are both solutesE) C) and D)
F) B) and C)

Question 6

The tendency for ions and molecules to move from an area of higher concentration to an area of lower concentrations is

Accepted Answer

A)   Vesicular transport
B)   Diffusion
C)   Filtration
D)   PumpingE) C) and D)
F) A) and B)

Question 7

A polyribosome makes several identical proteins from the same mRNA.

Accepted Answer

A) True 
 B)False

Question 8

The series of membranous sacs and channels throughout the cytoplasm are called

Accepted Answer

A)   Mitochondria
B)   Endoplasmic reticulum
C)   Golgi apparatus
D)   RibosomesE) None of the above
F) All of the above

Question 9

The hydrophobic end of a phospholipid faces the inside of the bilayer.

Accepted Answer

A) True 
 B)False

Question 10

The diffusion of water across a selectively permeable membrane is called

Accepted Answer

A)   Pumping
B)   Diffusion
C)   Osmosis
D)   All of the choices are correctE) A) and B)
F) B) and C)

Question 11

The chromosomes and associated proteins are in the form known as _____ when the cell is not dividing.

Accepted Answer

A)   Chromatids
B)   Histones
C)   Chromatin
D)   ChromosomesE) A) and B)
F) A) and C)

Question 12

Secondary active transport requires ATP to move the second substance across the membrane.

Accepted Answer

A) True 
 B)False  False

Question 13

The inner membrane folds in mitochondria are called

Accepted Answer

A)   Cisternae
B)   Vesicles
C)   Cristae
D)   VilliE) C) and D)
F) A) and C)

Question 14

All the triplets necessary to make a functional RNA or protein is called a/an

Accepted Answer

A)   Codon
B)   Chromosome
C)   Gene
D)   IntronE) A) and B)
F) A) and C)

Question 15

The plasma membrane allows some materials to pass through it but not others. This property make the plasma membrane

Accepted Answer

A)   Impermeable
B)   Nonpermeable
C)   Permeable
D)   Selectively permeableE) B) and D)
F) None of the above

Question 16

Which of the following will NOT pass through a plasma membrane by diffusion?

Accepted Answer

A)   Oxygen
B)   Carbon dioxide
C)   Steroid hormones
D)   Calcium ionsE) C) and D)
F) B) and D)

Question 17

The process of assembling proteins using the mRNA code is called

Accepted Answer

A)   Translation
B)   Mitosis
C)   Transcription
D)   RespirationE) B) and D)
F) B) and C) A

Question 18

What occurs in posttranscriptional processing?

Accepted Answer

A)   Introns are removed from mRNA
B)   Various exons are combined
C)   Exons are removed from mRNA
D)   Various introns are combinedE) A) and B)
F) All of the above

Question 19

Integrins act in both attachment and cellular communication.

Accepted Answer

A) True 
 B)False

Question 20

Differentiation of cells results from different genes being activated or deactivated.

Accepted Answer

A) True 
 B)False

Exam 3: Cell Structures and Their Functions

Generally free ribosomes make proteins that will be secreted from the cell.

Correct AnswerverifiedShow Answer

Which cell extension is a long whip-like structure?

Correct AnswerverifiedB

A transport protein can generally transport many different types of substances.

Correct AnswerverifiedShow Answer

Once an equilibrium is established from a concentration gradient, there is not more movement of molecules.

Correct AnswerverifiedShow Answer

In a solution of sugar and water, which of the following is true?

Correct AnswerverifiedShow Answer

The tendency for ions and molecules to move from an area of higher concentration to an area of lower concentrations is

Correct AnswerverifiedShow Answer

A polyribosome makes several identical proteins from the same mRNA.

Correct AnswerverifiedShow Answer

The series of membranous sacs and channels throughout the cytoplasm are called

Correct AnswerverifiedShow Answer

The hydrophobic end of a phospholipid faces the inside of the bilayer.

Correct AnswerverifiedShow Answer

The diffusion of water across a selectively permeable membrane is called

Correct AnswerverifiedShow Answer

The chromosomes and associated proteins are in the form known as _____ when the cell is not dividing.

Correct AnswerverifiedShow Answer

Secondary active transport requires ATP to move the second substance across the membrane.

Correct AnswerverifiedFalse

The inner membrane folds in mitochondria are called

Correct AnswerverifiedShow Answer

All the triplets necessary to make a functional RNA or protein is called a/an

Correct AnswerverifiedShow Answer

The plasma membrane allows some materials to pass through it but not others. This property make the plasma membrane

Correct AnswerverifiedShow Answer

Which of the following will NOT pass through a plasma membrane by diffusion?

Correct AnswerverifiedShow Answer

The process of assembling proteins using the mRNA code is called

Correct AnswerverifiedA

What occurs in posttranscriptional processing?

Correct AnswerverifiedShow Answer

Integrins act in both attachment and cellular communication.

Correct AnswerverifiedShow Answer

Differentiation of cells results from different genes being activated or deactivated.

Correct AnswerverifiedShow Answer

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B

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False

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A

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