Question 1

Which of the following is CORRECTLY matched with its function?

Accepted Answer

A)   channel proteins - catalyze chemical reactions inside the cell
B)   cell identity molecules - are primarily steroids
C)   receptor proteins - move specific ions or molecules using ATP
D)   peripheral proteins - penetrate the lipid bilayer from one surface to the other
E)   carrier proteins - move bound ions or molecules from one side of the membrane to the otherF) A) and D)
G) A) and C)

Question 2

The second most abundant of the lipids in the plasma membrane is/are

Accepted Answer

A)   glycolipids.
B)   saturated fats.
C)   cholesterol.
D)   phospholipids.
E)   triglycerides.F) A) and B)
G) A) and C)

Question 3

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 E)
G) C) and E)

Question 4

A group of cells was treated with a proteolytic (protein-digesting)  enzyme. Which of the following processes would be least affected by this treatment?

Accepted Answer

A)   diffusion of sodium through sodium membrane channels
B)   diffusion of lipid-soluble molecules through the plasma membrane
C)   use of carrier molecules in facilitated diffusion
D)   sodium-potassium exchange pump
E)   secondary active transportF) C) and E)
G) B) and E)

Question 5

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) C) and D)
G) A) and B)

Question 6

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

Accepted Answer

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

Question 7

If a 0.9% NaCl (saline)  solution is isotonic to a cell, then a solution of 3.5% NaCl would be

Accepted Answer

A)   hypertonic to the cell.
B)   isotonic to the cell.
C)   hypotonic to the cell.
D)   catatonic to the cell.
E)   All of these choices are correct.F) D) and E)
G) A) and E)

Question 8

The sequence of nucleotides in a messenger RNA molecule is needed to determine the sequence of

Accepted Answer

A)   nucleotides in a gene.
B)   amino acids in a protein.
C)   nucleotides in the anticodons of tRNA.
D)   codons in DNA.
E)   amino acids in DNA.F) A) and B)
G) A) and C)

Question 9

Which mature cells do not have a nucleus?

Accepted Answer

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

Question 10

A cell that breaks down and recycles proteins would have large numbers of

Accepted Answer

A)   rough ER.
B)   lysosomes.
C)   peroxisomes.
D)   secretory vesicles.
E)   proteosomes.F) A) and D)
G) A) and C)

Question 11

Which of the following is NOT a G-protein complex protein?

Accepted Answer

A)   delta
B)   gamma
C)   alpha
D)   beta
E)   None of these choices are correct.F) All of the above
G) D) and E)

Question 12

A DNA nucleotide sequence that signals the beginning of a gene is called a

Accepted Answer

A)   transcription factor.
B)   promoter.
C)   triplet.
D)   terminator.
E)   RNA polymerase.F) B) and D)
G) None of the above

Question 13

Cells that respond to ligands

Accepted Answer

A)   possess receptor sites for specific ligands.
B)   generally produce the ligands.
C)   have lysosomes that destroy the ligands.
D)   are using electrical signals in cellular communication.
E)   are not functional.F) B) and C)
G) A) and D)

Question 14

Nucleoli

Accepted Answer

A)   are located in the cytoplasm.
B)   produce ribosomal subunits.
C)   have a distinct membrane.
D)   are important for the formation of the Golgi apparatus.
E)   regulate movement of materials into the nucleus.F) A) and B)
G) B) and C)

Question 15

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) A) and C)
G) None of the above

Question 16

Which of the following is an organelle of locomotion?

Accepted Answer

A)   endoplasmic reticulum
B)   Golgi apparatus
C)   nucleolus
D)   peroxisomes
E)   flagellumF) B) and E)
G) B) and C)

Question 17

Which of the following organelles may or may not have ribosomes attached?

Accepted Answer

A)   endoplasmic reticulum
B)   Golgi apparatus
C)   nucleolus
D)   peroxisomes
E)   flagellumF) A) and C)
G) A) and D)

Question 18

DNA replication results in two new DNA molecules. Each of these new molecules

Accepted Answer

A)   has two newly synthesized strands of nucleotides.
B)   has one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides.
C)   has two strands of nucleotides from the parent.
D)   has a single strand of nucleotides.
E)   are incomplete copies of the original.F) B) and E)
G) None of the above

Question 19

What is the organelle where subunits of ribosomes are manufactured?

Accepted Answer

A)   endoplasmic reticulum
B)   Golgi apparatus
C)   nucleolus
D)   peroxisomes
E)   flagellumF) A) and B)
G) A) and C)

Question 20

-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)   hypotonic solution
B)   hypertonic solution
C)   isotonic solution
D)   lyzed
E)   crenatedF) None of the above
G) D) and E)

Exam 3: Cell Biology

What is the organelle where subunits of ribosomes are manufactured?

Correct AnswerverifiedShow Answer

If a 0.9% NaCl (saline) solution is isotonic to a cell, then a solution of 3.5% NaCl would be

Correct AnswerverifiedShow Answer

A cell that breaks down and recycles proteins would have large numbers of

Correct AnswerverifiedShow Answer

Which of the following is NOT a G-protein complex protein?

Correct AnswerverifiedShow Answer

Which of the following organelles may or may not have ribosomes attached?

Correct AnswerverifiedShow Answer

The second most abundant of the lipids in the plasma membrane is/are

Correct AnswerverifiedShow Answer

Cells that respond to ligands

Correct AnswerverifiedShow Answer

The sequence of nucleotides in a messenger RNA molecule is needed to determine the sequence of

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 AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Nucleoli

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

DNA replication results in two new DNA molecules. Each of these new molecules

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is an organelle of locomotion?

Correct AnswerverifiedShow Answer

A DNA nucleotide sequence that signals the beginning of a gene is called a

Correct AnswerverifiedShow Answer

Which mature cells do not have a nucleus?

Correct AnswerverifiedShow Answer

Which of the following is CORRECTLY matched with its function?

Correct AnswerverifiedShow Answer

Mitochondria

Correct AnswerverifiedShow Answer

A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?

Correct AnswerverifiedShow Answer

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