Question 1

In the nucleus, DNA is wrapped with proteins. This complex is called

Accepted Answer

A)   chromatin.
B)   DNA particles.
C)   nucleoli.
D)   a DNA wrap.
E)   cytoplasmic organelles.F) C) and D)
G) A) and B)

Question 2

All of the chemical reactions within a cell are known as cell

Accepted Answer

A)   communication.
B)   inheritance.
C)   metabolism.
D)   movement.
E)   reproduction.F) A) and C)
G) B) and C)

Question 3

Which of the following is NOT true of a transmission electron microscope (TEM) ?

Accepted Answer

A)   The electron beam is focused with electromagnets.
B)   The specimen must be fixed in plastic.
C)   The limit of resolution is about 0.1 μ\muμ m.
D)   Electrons are passed through the specimen.
E)   Gives the clearest three-dimensional images. F) C) and D)
G) B) and C)

Question 4

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

Accepted Answer

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

Question 5

What type of cells are covered with microvilli for increased absorption?

Accepted Answer

A)   columnar cells of small intestines
B)   columnar cells of upper respiratory tract
C)   macrophage (large, mobile white blood cell) 
D)   spermatozoa
E)   red blood cellsF) A) and E)
G) C) and D)

Question 6

A particular membrane transport process exhibits saturation, uses carrier molecules, but does NOT require ATP. The process is probably

Accepted Answer

A)   active transport.
B)   osmosis.
C)   phagocytosis.
D)   pinocytosis.
E)   facilitated diffusion.F) A) and B)
G) B) and E)

Question 7

Vitamin A, a fat-soluble vitamin, would move across the plasma membrane into the cell

Accepted Answer

A)   through vitamin membrane channels.
B)   in vesicles.
C)   by dissolving in the lipid bilayer.
D)   by active transport.
E)   by transport with carrier molecules.F) A) and B)
G) B) and E)

Question 8

Mitochondria

Accepted Answer

A)   contains DNA.
B)   have inner and outer membranes.
C)   have inner folds called cristae.
D)   are the cell's power plants.
E)   All of these choices are correct.F) D) and E)
G) C) and D)

Question 9

-Answer these questions about chromosome structure. What does "D" represent?

Accepted Answer

A)   chromosome
B)   proteins
C)   chromatin
D)   centromere
E)   chromatidF) B) and D)
G) B) and C)

Question 10

A protein that is converted to an active enzyme is a

Accepted Answer

A)   codon.
B)   proenzyme.
C)   gene.
D)   pre-mRNA.
E)   ribosomal RNA (rRN
A)  .F) A) and D)
G) B) and D)

Question 11

Which of the following molecules contains the anticodon?

Accepted Answer

A)   mRNA
B)   rRNA
C)   tRNA
D)   DNA
E)   None of these choices are correct.F) B) and E)
G) B) and D)

Question 12

Three adjacent nucleotides in mRNA are called a

Accepted Answer

A)   pre-mRNA.
B)   gene.
C)   codon.
D)   ribosomal RNA (rRN
A)  .
E)   proenzyme.F) D) and E)
G) C) and E)

Question 13

Which mature cells do not have a nucleus?

Accepted Answer

A)   columnar cells of small intestines
B)   columnar cells of upper respiratory tract
C)   spermatozoa
D)   macrophage (large, mobile white blood cell) 
E)   red blood cellsF) A) and B)
G) C) and D)

Question 14

Which of the following terms does NOT relate to the mitochondria?

Accepted Answer

A)   ATP
B)   cristae
C)   self-replicating
D)   outer and inner membranes
E)   vitamin A storageF) B) and E)
G) A) and C)

Question 15

-Red blood cells (RBCs)  have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution "C"?

Accepted Answer

A)   isotonic solution
B)   crenated
C)   hypotonic solution
D)   lyzed
E)   hypertonic solutionF) A) and E)
G) B) and E) D

Question 16

Before cell division occurs, DNA in the nucleus is condensed to form

Accepted Answer

A)   RNA.
B)   genes.
C)   cytosol.
D)   chromosomes.
E)   chromatin.F) B) and E)
G) A) and D)

Question 17

Active transport

Accepted Answer

A)   requires ATP.
B)   involves vesicle formation.
C)   does not require metabolic energy (ATP) .
D)   can move substances along their concentration gradient.
E)   follows osmotic pressure gradients.F) A) and D)
G) C) and D) A

Question 18

The predominant lipid in the cell membrane is a

Accepted Answer

A)   triglyceride.
B)   glycolipid.
C)   phospholipid.
D)   prostaglandin.
E)   cholesterol.F) None of the above
G) A) and D)

Question 19

The structural RNA of ribosomes is a

Accepted Answer

A)   proenzyme.
B)   gene.
C)   codon.
D)   pre-mRNA.
E)   ribosomal RNA (rRN
A)  .F) C) and D)
G) A) and E) E

Question 20

DNA replication occurs during

Accepted Answer

A)   the S phase of interphase.
B)   the G1 phase of interphase.
C)   metaphase.
D)   anaphase.
E)   telophase.F) B) and E)
G) A) and B)

Exam 3: Cell Biology

In the nucleus, DNA is wrapped with proteins. This complex is called

Correct AnswerverifiedShow Answer

All of the chemical reactions within a cell are known as cell

Correct AnswerverifiedShow Answer

Which of the following is NOT true of a transmission electron microscope (TEM) ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What type of cells are covered with microvilli for increased absorption?

Correct AnswerverifiedShow Answer

A particular membrane transport process exhibits saturation, uses carrier molecules, but does NOT require ATP. The process is probably

Correct AnswerverifiedShow Answer

Vitamin A, a fat-soluble vitamin, would move across the plasma membrane into the cell

Correct AnswerverifiedShow Answer

Mitochondria

Correct AnswerverifiedShow Answer

-Answer these questions about chromosome structure. What does "D" represent?

Correct AnswerverifiedShow Answer

A protein that is converted to an active enzyme is a

Correct AnswerverifiedShow Answer

Which of the following molecules contains the anticodon?

Correct AnswerverifiedShow Answer

Three adjacent nucleotides in mRNA are called a

Correct AnswerverifiedShow Answer

Which mature cells do not have a nucleus?

Correct AnswerverifiedShow Answer

Which of the following terms does NOT relate to the mitochondria?

Correct AnswerverifiedShow Answer

-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution "C"?

Correct AnswerverifiedD

Before cell division occurs, DNA in the nucleus is condensed to form

Correct AnswerverifiedShow Answer

Active transport

Correct AnswerverifiedA

The predominant lipid in the cell membrane is a

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The structural RNA of ribosomes is a

Correct AnswerverifiedE

DNA replication occurs during

Correct AnswerverifiedShow Answer

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D

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A

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E

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