Question 1

-What structure does "B" represent on the diagram of the plasma membrane?

Accepted Answer

A)   Membrane channel protein
B)   Phospholipid bilayer
C)   Internal membrane surface
D)   Peripheral protein
E)   Integral proteinF) A) and B)
G) A) and C)

Question 2

If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?

Accepted Answer

A)   Protein synthesis
B)   Intracellular digestion
C)   Microtubule production
D)   Secretion of glycoproteins and lipoproteins
E)   Active transportF) All of the above
G) A) and B)

Question 3

Osmosis is the diffusion of ________ across a selectively permeable membrane.

Accepted Answer

A)   urea
B)   oxygen
C)   water
D)   sodium
E)   sugarF) C) and D)
G) None of the above

Question 4

The movement of water through a selectively permeable membrane is called ________.

Accepted Answer

A)   active transport
B)   diffusion
C)   endocytosis
D)   facilitated diffusion
E)   osmosisF) B) and E)
G) C) and D)

Question 5

Which of the following statements concerning membrane transport across the plasma membrane is true?

Accepted Answer

A)   Polar molecules are transported more easily than nonpolar molecules.
B)   Lipid-soluble substances pass through the membrane by dissolving in the lipid bilayer.
C)   Water cannot move through the membrane.
D)   Generally, cations pass through the membrane more easily than anions.
E)   All molecules are moved across by active transport.F) C) and D)
G) B) and D)

Question 6

Cells of the small intestine and kidney tubules have extensions called ________, which increase their surface area.

Accepted Answer

A)   cilia
B)   hairs
C)   rugae
D)   microvilli
E)   flagellaF) A) and D)
G) A) and C)

Question 7

At the base of each cilium is a structure called the ________.

Accepted Answer

A)   kinetochore
B)   basal body
C)   dynein arm
D)   centrosome
E)   None of the choices are correct.F) B) and D)
G) C) and D)

Question 8

You are looking at a cell with the electron microscope and you notice the following characteristics: presence of many mitochondria and lysosomes; few, if any, Golgi apparatus; and many ribosomes. Which of the following is the most likely function of that cell?

Accepted Answer

A)   Secretion of lipids
B)   Intracellular digestion
C)   DNA replication
D)   Modification of protein
E)   Absorption of nutrientsF) B) and E)
G) C) and D)

Question 9

Which type of membrane proteins are integral proteins that move ions or molecules across plasma membrane?

Accepted Answer

A)   Marker molecules
B)   Channel protein
C)   Receptor proteins
D)   Enzymes
E)   Carrier proteinsF) B) and C)
G) B) and E)

Question 10

Check all of the major hypotheses of aging.

Accepted Answer

A)   Damage to mitochondria
B)   Damage to the DNA from free radicals
C)   Damage to lysosomes
D)   Presence of a "cell death clock"
E)   Presence of "death genes"F) C) and D)
G) None of the above

Question 11

Which of the following are consistent with facilitated diffusion?
(1)  Movement is against a concentration gradient
(2)  Movement is with a concentration gradient
(3)  Involves a carrier molecule
(4)  Involves cotransport
(5)  Involves counter transport
(6)  Exhibits competition and saturation

Accepted Answer

A)   1, 2, 4, 5, 6
B)   2, 3, 6
C)   2, 3, 5, 6
D)   1, 3, 4, 5, 6
E)   2, 3, 4, 6F) D) and E)
G) B) and C)

Question 12

The transfer of information from DNA to messenger RNA (mRNA)  is known as ________.

Accepted Answer

A)   transduction
B)   translocation
C)   translation
D)   transcription
E)   transmutationF) All of the above
G) A) and D)

Question 13

The structural and functional unit of all living organisms is the ________.

Accepted Answer

A)   ribosome
B)   cell
C)   organ
D)   organelle
E)   plasma membraneF) A) and E)
G) A) and D)

Question 14

What is mediated transport?

Accepted Answer

A)   The movement of molecules across a plasma membrane by means of a protein carrier
B)   The movement of vesicles by intermediate filaments
C)   The process of peptide synthesis on the surface of the ribosome
D)   The ability of molecules to pass through the nuclear envelopeE) None of the above
F) C) and D)

Question 15

Mitosis forms

Accepted Answer

A)   two daughter cells with half the DNA of the parent cell.
B)   two daughter cells with the same amount of DNA as the parent cell.
C)   daughter cells called gametes.
D)   two daughter cells with twice the amount of DNA as the parent cell.
E)   one daughter cell and another incomplete cell.F) B) and E)
G) D) and E)

Question 16

A toxic drug destroyed the Golgi apparatus. This would affect

Accepted Answer

A)   ribosomal RNA synthesis.
B)   intracellular digestion.
C)   energy production.
D)   microtubule production.
E)   packaging of glycoproteins and lipoproteins.F) B) and D)
G) C) and D)

Question 17

In which part of the cell cycle do chromosomes align along the equator?

Accepted Answer

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

Question 18

The main components of the plasma membrane are

Accepted Answer

A)   carbohydrates, ions, and lipids.
B)   lipids and ions.
C)   proteins and carbohydrates.
D)   proteins, lipids, and carbohydrates.
E)   ions, lipids, and proteins.F) A) and B)
G) C) and D)

Question 19

A mRNA containing introns is a ________.

Accepted Answer

A)   pre-mRNA
B)   proenzyme
C)   gene
D)   ribosomal RNA (rRN
A)  
E)   codonF) All of the above
G) A) and B)

Question 20

Which organelle contains chromosomes?

Accepted Answer

A)   Nucleus
B)   Ribosomes
C)   Lysosomes
D)   Smooth ER
E)   CentriolesF) A) and C)
G) A) and D)

Exam 3: Cell Biology

Which of the following are consistent with facilitated diffusion? (1) Movement is against a concentration gradient (2) Movement is with a concentration gradient (3) Involves a carrier molecule (4) Involves cotransport (5) Involves counter transport (6) Exhibits competition and saturation

Correct AnswerverifiedShow Answer

What is mediated transport?

Correct AnswerverifiedShow Answer

Mitosis forms

Correct AnswerverifiedShow Answer

Which of the following statements concerning membrane transport across the plasma membrane is true?

Correct AnswerverifiedShow Answer

A mRNA containing introns is a ________.

Correct AnswerverifiedShow Answer

At the base of each cilium is a structure called the ________.

Correct AnswerverifiedShow Answer

Check all of the major hypotheses of aging.

Correct AnswerverifiedShow Answer

The movement of water through a selectively permeable membrane is called ________.

Correct AnswerverifiedShow Answer

In which part of the cell cycle do chromosomes align along the equator?

Correct AnswerverifiedShow Answer

The transfer of information from DNA to messenger RNA (mRNA) is known as ________.

Correct AnswerverifiedShow Answer

Osmosis is the diffusion of ________ across a selectively permeable membrane.

Correct AnswerverifiedShow Answer

You are looking at a cell with the electron microscope and you notice the following characteristics: presence of many mitochondria and lysosomes; few, if any, Golgi apparatus; and many ribosomes. Which of the following is the most likely function of that cell?

Correct AnswerverifiedShow Answer

The structural and functional unit of all living organisms is the ________.

Correct AnswerverifiedShow Answer

The main components of the plasma membrane are

Correct AnswerverifiedShow Answer

-What structure does "B" represent on the diagram of the plasma membrane?

Correct AnswerverifiedShow Answer

Cells of the small intestine and kidney tubules have extensions called ________, which increase their surface area.

Correct AnswerverifiedShow Answer

A toxic drug destroyed the Golgi apparatus. This would affect

Correct AnswerverifiedShow Answer

Which organelle contains chromosomes?

Correct AnswerverifiedShow Answer

If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?

Correct AnswerverifiedShow Answer

Which type of membrane proteins are integral proteins that move ions or molecules across plasma membrane?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified