Chapter 3 MCQ from Textbook

Question 1

Because they are embedded within the membrane, ion channels are examples of ________.
a. receptor proteins
b. integral proteins
c. peripheral proteins
d. glycoproteins

Answer 1

b) Integral Proteins

Question 2

The diffusion of substances within a solution tends to move those substances ________ their ________ gradient.
a. up; electrical
b. up; electrochemical
c. down; pressure
d. down; concentration

Answer 2

d) Down, concentration

Question 3

Ion pumps and phagocytosis are both examples of ________.
a. endocytosis
b. passive transport
c. active transport
d. facilitated diffusion

Answer 3

c) Active Transport

Question 4

Choose the term that best completes the following analogy: Cytoplasm is to cytosol as a swimming pool containing chlorine and flotation toys is to ________.
a. the walls of the pool
b. the chlorine
c. the flotation toys
d. the water

Answer 4

d) The water

Question 5

The rough ER has its name due to what associated structures?
a. Golgi apparatus
b. ribosomes
c. lysosomes
d. proteins

Answer 5

b) Ribosomes

Question 6

Which of the following is a function of the rough ER?
a. production of proteins
b. detoxigcation of certain substances
c. synthesis of steroid hormones
d. regulation of intracellular calcium
concentration

Answer 6

a) Production of proteins

Question 7

Which of the following is a feature common to all three components of the cytoskeleton?
a. They all serve to scaffold the organelles within the cell.
b. They are all characterized by roughly the same diameter.
c. They are all polymers of protein subunits.
d. They all help the cell resist compression and
tension.

Answer 7

c) They are all polymers of protein subunits.

Question 8

Which of the following organelles produces large quantities of ATP when both glucose and oxygen are available to the cell?
a. mitochondria
b. peroxisomes
c. lysosomes
d. ER

Answer 8

a) Mitochondria

Question 9

The nucleus and mitochondria share which of the following features?
a. protein-lined membrane pores
b. a double cell membrane
c. the synthesis of ribosomes
d. the production of cellular energy

Answer 9

b) A double cell membrane

Question 10

Which of the following structures could be found within the nucleolus?
a. chromatin
b. histones
c. ribosomes
d. nucleosomes

Answer 10

c) Ribosomes

Question 11

Which of the following sequences on a DNA molecule would be complementary to GCTTATAT?
a. TAGGCGCG
b. ATCCGCGC
c. CGAATATA
d. TGCCTCTC

Answer 11

c) CGAATATA

Question 12

Place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome
a. DNA, nucleosome, chromatin, chromosome
b. nucleosome, DNA, chromosome, chromatin
c. DNA, chromatin, nucleosome, chromosome
d. nucleosome, chromatin, DNA, chromosome

Answer 12

a) DNA, Nucleosome, Chromatin, Chromosome

Question 13

Which of the following is part of the elongation step of DNA synthesis?
a. pulling apart the two DNA strands
b. attaching complementary nucleotides to the
template strand
c. untwisting the DNA helix
d. none of the above

Answer 13

b) Attaching complementary nucleotides to the template strand.

Question 14

Which of the following is not a difference between DNA and RNA?
a. DNA contains thymine whereas RNA contains uracil
b. DNA contains deoxyribose and RNA contains ribose
c. DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars
d. RNA is single stranded and DNA is double stranded

Answer 14

c) DNA has altering sugar-phosphate molecule whereas RNA doesn’t contain sugars.

Question 15

Transcription and translation take place in the ________ and ________, respectively.
a. nucleus; cytoplasm
b. nucleolus; nucleus
c. nucleolus; cytoplasm
d. cytoplasm; nucleus

Answer 15

c) Nucleolus, Cytoplasm

Question 16

How many “letters” of an RNA molecule, in sequence, does it take to provide the code for a single amino acid?
a. 1
b. 2
c. 3
d. 4

Answer 16

c) 3

Question 17

Which of the following is not made out of RNA?
a. the carriers that shuffle amino acids to a
growing polypeptide strand
b. the ribosome
c. the messenger molecule that provides the
code for protein synthesis
d. the intron

Answer 17

d) The Intron

Question 18

Which of the following phases is characterized by preparation for DNA synthesis?
a. G0
b. G1
c. G2
d. S

Answer 18

b) G1 Phase

Question 19

A mutation in the gene for a cyclin protein might result in which of the following?
a. a cell with additional genetic material than normal
b. cancer
c. a cell with less genetic material than normal
d. any of the above

Answer 19

d) Any of the above

Question 20

What is a primary function of tumor suppressor genes?
a. stop all cells from dividing
b. stop certain cells from dividing
c. help oncogenes produce oncoproteins
d. allow the cell to skip certain phases of the cell
cycle

Answer 20

b) Stop certain cells from dividing

Question 21

Arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotency.
a. multipotency, pleuripotency, oligopotency, unipotency
b. pleuripotency, oligopotency, multipotency unipotency
c. oligopotency, pleuripotency, unipotency, multipotency
d. pleuripotency, multipotency, oligopotency, unipotency

Answer 21

d) pleuripotency, multipotency, oligopotency, unipotency

Question 22

Which type of stem cell gives rise to red and white blood cells?
a. endothelial
b. epithelial
c. hematopoietic
d. mesenchymal

Answer 22

C) Hematopoietic

Question 23

What multipotent stem cells from children sometimes banked by parents?
a. fetal stem cells
b. embryonic stem cells
c. cells from the umbilical cord and from baby
teeth
d. hematopoietic stem cells from red and white blood cells

Answer 23

d) hematopoietic stem cells from red and white blood cells