Question 1

Figure 3-2 The Plasma membrane
Use Figure 3-2 to answer the following questions:
-What part of the plasma membrane is hydrophobic?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  6 C

Question 2

The molecule that brings the proper amino acid into place at the ribosome for the elongation of a new protein is called

Accepted Answer

A)  mRNA.
B)  tRNA.
C)  ATP.
D)  Na-K.
E)  rRNA. B

Question 3

Which form of endoplasmic reticulum modifies and packages newly synthesized proteins?

Accepted Answer

A)  ribosomal endoplasmic reticulum
B)  proteosomes reticulum
C)  raised endoplasmic reticulum
D)  smooth endoplasmic reticulum
E)  rough endoplasmic reticulum E

Question 4

Define osmosis.

Accepted Answer

Osmosis is the transfer of wat...

Question 5

The plasma membrane includes

Accepted Answer

A)  integral proteins.
B)  glycolipids.
C)  phospholipids.
D)  cholesterol.
E)  All of the answers are correct.

Question 6

The "r" in rRNA stands for

Accepted Answer

A)  regeneration.
B)  recurrence.
C)  rebuilding.
D)  ribosomal.
E)  radiation.

Question 7

A solution that contains a lower osmotic pressure than the cytoplasm of a cell is called

Accepted Answer

A)  merotonic.
B)  hypertonic.
C)  isotonic.
D)  hypotonic.
E)  homotonic.

Question 8

Which of following properties of microtubules is correct?

Accepted Answer

A)  made of myosin
B)  made of actin
C)  found only in the terminal web
D)  another term for microfilaments
E)  interact with dynein and kinesin

Question 9

The duplication of DNA is called ________,the copying of DNA to mRNA is called ________,and the reading of the mRNA by the cell to make a protein is called ________.

Accepted Answer

A)  replication; transcription; translation
B)  interphase; replication; active transport
C)  replication; translation; transcription
D)  mitosis; duplication; protein synthesis
E)  reproduction; duplication; initiation

Question 10

Thymine is replaced by which nitrogen base in RNA?

Accepted Answer

A)  ribose
B)  uracil
C)  guanine
D)  thymine is not replaced in RNA
E)  cytosine

Question 11

The functional units of DNA that contain the instructions for making one or more proteins are

Accepted Answer

A)  chromosomes.
B)  genes.
C)  ribosomes.
D)  codons.
E)  RNA.

Question 12

Diffusion of a substance across the cell membrane is influenced by all of the following except

Accepted Answer

A)  hydrolysis of ATP.
B)  the presence of the membrane channels.
C)  the charge on the ion.
D)  concentration gradient.
E)  lipid solubility.

Question 13

During the synthesis of proteins,amino acids are assembled in the proper sequence because each tRNA molecule that brings them to the ribosome has a(n) ________ that binds to a complementary codon in the mRNA.

Accepted Answer

A)  enzyme
B)  nucleotide
C)  anticodon
D)  promotor
E)  transporter

Question 14

Red blood cell shrinkage is to ________ as red blood cell bursting is to ________.

Accepted Answer

A)  crenation; hemolysis
B)  lysis; crenation
C)  hypotonic; isotonic
D)  isotonic; hypotonic
E)  isotonic; hypertonic

Question 15

The endoplasmic reticulum is responsible for

Accepted Answer

A)  drug and toxin neutralization.
B)  lipid synthesis.
C)  modification of new proteins.
D)  shipping molecules to the Golgi apparatus.
E)  All of the answers are correct.

Question 16

Molecular motors that carry materials in opposite directions along microtubules are called

Accepted Answer

A)  kinesin and myosin.
B)  actin and myosin.
C)  dynein and myosin.
D)  dynein and actin.
E)  dynein and kinesin.

Question 17

The potential difference across the cell membrane is due to the separation of

Accepted Answer

A)  carbohydrate molecules.
B)  water molecules.
C)  cations and anions.
D)  acids and bases.
E)  phospholipids and proteins.

Question 18

Generally,cells with a very brief interphase and lacking a G₀ phase

Accepted Answer

A)  are stem cells.
B)  do not exhibit cytokinesis.
C)  have brief life spans.
D)  are reproductive cells.
E)  lack the enzyme DNA polymerase.

Question 19

During mitosis,two daughter cells form,each of which has

Accepted Answer

A)  a different number of chromosomes than the original cell.
B)  twice as many chromosomes as the original cell.
C)  the same number of chromosomes as the original cell.
D)  a lesser number of chromosomes than the original cell.
E)  half as many chromosomes as the original cell.

Question 20

Which of the following consists of a network of intracellular membranes with attached ribosomes?

Accepted Answer

A)  rough endoplasmic reticulum
B)  smooth endoplasmic reticulum
C)  mitochondria
D)  nucleoli
E)  Golgi apparatus

Exam 3: The Cellular Level of Organization

Figure 3-2 The Plasma membrane Use Figure 3-2 to answer the following questions: -What part of the plasma membrane is hydrophobic?

Correct AnswerverifiedC

The molecule that brings the proper amino acid into place at the ribosome for the elongation of a new protein is called

Correct AnswerverifiedB

Which form of endoplasmic reticulum modifies and packages newly synthesized proteins?

Correct AnswerverifiedE

Define osmosis.

Correct AnswerverifiedOsmosis is the transfer of wat...View AnswerShow Answer

The plasma membrane includes

Correct AnswerverifiedShow Answer

The "r" in rRNA stands for

Correct AnswerverifiedShow Answer

A solution that contains a lower osmotic pressure than the cytoplasm of a cell is called

Correct AnswerverifiedShow Answer

Which of following properties of microtubules is correct?

Correct AnswerverifiedShow Answer

The duplication of DNA is called ________,the copying of DNA to mRNA is called ________,and the reading of the mRNA by the cell to make a protein is called ________.

Correct AnswerverifiedShow Answer

Thymine is replaced by which nitrogen base in RNA?

Correct AnswerverifiedShow Answer

The functional units of DNA that contain the instructions for making one or more proteins are

Correct AnswerverifiedShow Answer

Diffusion of a substance across the cell membrane is influenced by all of the following except

Correct AnswerverifiedShow Answer

During the synthesis of proteins,amino acids are assembled in the proper sequence because each tRNA molecule that brings them to the ribosome has a(n) ________ that binds to a complementary codon in the mRNA.

Correct AnswerverifiedShow Answer

Red blood cell shrinkage is to ________ as red blood cell bursting is to ________.

Correct AnswerverifiedShow Answer

The endoplasmic reticulum is responsible for

Correct AnswerverifiedShow Answer

Molecular motors that carry materials in opposite directions along microtubules are called

Correct AnswerverifiedShow Answer

The potential difference across the cell membrane is due to the separation of

Correct AnswerverifiedShow Answer

Generally,cells with a very brief interphase and lacking a G₀ phase

Correct AnswerverifiedShow Answer

During mitosis,two daughter cells form,each of which has

Correct AnswerverifiedShow Answer

Which of the following consists of a network of intracellular membranes with attached ribosomes?

Correct AnswerverifiedShow Answer

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C

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B

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E

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Osmosis is the transfer of wat...
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The duplication of DNA is called ,the copying of DNA to mRNA is called ,and the reading of the mRNA by the cell to make a protein is called .

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Red blood cell shrinkage is to as red blood cell bursting is to .

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