9780323711265 | All Chapters with Answers and Rationals
Which of the following is considered the control center of the cell?
a. Mitochondrion
b. Nucleus
c. Lysosome
d. Centriole - ANSWER: b. Nucleus
The mitochondrion is called the power plant of the cell because _____ within the
mitochondrion.
a. most of the ATP is produced
b. all protein synthesis occurs
c. all DNA is located
d. all ribosomes are located - ANSWER: a. most of the ATP is produced
Which of the following is (are) found on the rough endoplasmic reticulum?
a. Ribosomes
b. Cilia
c. Lysosomes
d. DNA - ANSWER: a. Ribosomes
The rough ER is the site of:
a. fatty acid and steroid synthesis.
b. Krebs cycle activity.
c. protein synthesis.
d. intracellular water storage. - ANSWER: c. protein synthesis.
Which of the following is most associated with the ribosome?
a. ATP production
b. Intracellular housecleaning
c. Glycogen storage
d. Protein synthesis - ANSWER: d. Protein synthesis
What is the transport mechanism in this description: A passive process that "pulls" water from
an area where there is more water to an area where there is less water?
a. Filtration
b. Endocytosis
c. An ATP-driven pump
d. Osmosis - ANSWER: d. Osmosis
What is the transport mechanism in this description: A passive process that uses a pressure
difference as its driving force?
a. Facilitated diffusion
b. An ATP-driven pump
c. Diffusion
d. Filtration - ANSWER: d. Filtration
A beaker is divided into two compartments by a semipermeable membrane. Compartment A
contains a 20% NaCl solution and compartment B contains a 50% NaCl solution. The
membrane is permeable to water but not to Na+ or Cl-. Initially,
a. water diffuses from compartment B to compartment A.
b. Na+ diffuses from compartment B to compartment A.
c. Na+ diffuses from compartment A to compartment B.
, d. water diffuses from compartment A to compartment B. - ANSWER: d. water diffuses from
compartment A to compartment B.
A beaker is divided into two compartments by a semipermeable membrane. Compartment A
contains a 20% NaCl solution and compartment B contains a 50% NaCl solution. The
membrane is permeable to water but not to Na+ or Cl-. At equilibrium, the:
a. volume of water in compartment A will be greater than the volume in compartment
B.
b. volume in both compartments A and B will be equal.
c. concentration of compartment A will decrease.
d. volume in compartment B will be greater than the volume in compartment A. - ANSWER: d. volume
in compartment B will be greater than the volume in compartment A.
A beaker is divided into two compartments by a semipermeable membrane. Compartment A
contains a 20% NaCl solution while compartment B contains a 50% NaCl solution. The
membrane is permeable to both water and Na+ and Cl-. Initially,
a. Na+ and Cl-- diffuse from compartment B to compartment A.
b. water diffuses from compartment B to compartment A.
c. Na+ and Cl-diffuse from compartment A to compartment B.
d. Na+ diffuses from compartment A to compartment B and Cl- diffuses from
compartment B to compartment A. - ANSWER: a. Na+ and Cl-- diffuse from compartment B to
compartment A.
A beaker is divided into two compartments by a semipermeable membrane. Compartment A
contains a 20% NaCl solution and compartment B contains a 50% NaCl solution. The
membrane is permeable to both water and Na+ and Cl-. At equilibrium, the:
a. volume in compartment A will be greater than the volume in compartment B.
b. volume in compartment B will be greater than the volume in compartment A.
c. concentrations and volumes will be the same in both compartments.
d. concentration of salt is greater in compartment A than in compartment B. - ANSWER: c.
concentrations and volumes will be the same in both compartments.
What are the hairlike structures located on the outer surface of the cell membrane?
a. Mitochondria
b. Ribosomes
c. Cilia
d. Centrioles - ANSWER: c. Cilia
What is the extensive internal membrane system that forms channels and is concerned with
the synthesis of protein and steroids?
a. Mitochondria
b. Lysosomes
c. Endoplasmic reticulum
d. DNA - ANSWER: c. Endoplasmic reticulum
Lysosomes are filled with:
a. powerful enzymes that digest cellular waste and debris.
b. cilia.
c. DNA.
d. blood. - ANSWER: a. powerful enzymes that digest cellular waste and debris
Which of the following best describes the power or driving force for active transport?
a. ATP
b. Pressure
c. DNA
d. H+ - ANSWER: a. ATP