Question 1

Which of the following events occurs during anaphase?

Accepted Answer

A)  The nuclear envelope degenerates. 
B)  Chromosomes migrate to opposite poles of the cell. 
C)  Chromatin strands condense to form chromosomes. 
D)  Cytokinesis completes. 
E)  Spindle fibers are formed. 
A)  The nuclear envelope degenerates. 
B)  Chromosomes migrate to opposite poles of the cell. 
C)  Chromatin strands condense to form chromosomes. 
D)  Cytokinesis completes. 
E)  Spindle fibers are formed.

Question 2

What is a large, active phagocytic cell?

Accepted Answer

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

Question 3

Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

Accepted Answer

A)  the difference in the percentage of salt between the top and bottom samples would increase. 
B)  the percentage of salt in top and bottom samples would be approximately equal. 
C)  the samples would still be 2% and 20% respectively. 
D)  the salt would float to the top. 
E)  None of these choices are correct. 
A)  the difference in the percentage of salt between the top and bottom samples would increase. 
B)  the percentage of salt in top and bottom samples would be approximately equal. 
C)  the samples would still be 2% and 20% respectively. 
D)  the salt would float to the top. 
E)  None of these choices are correct.

Question 4

If 0.9% NaCl (saline) solution is isotonic to a cell, then a 0.5% saline solution

Accepted Answer

A)  will not affect the cell. 
B)  is hypotonic to the cell. 
C)  will cause crenation of the cell. 
D)  will shrink the cell. 
E)  is hypertonic to the cell. 
A)  will not affect the cell. 
B)  is hypotonic to the cell. 
C)  will cause crenation of the cell. 
D)  will shrink the cell. 
E)  is hypertonic to the cell.

Question 5

A mRNA containing introns is a

Accepted Answer

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

Question 6

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

Question 7

The movement of oxygen from the alveoli of the lungs into the bloodstream is an example of

Accepted Answer

A)  osmosis. 
B)  active transport. 
C)  bulk transport. 
D)  facilitated diffusion. 
E)  diffusion. 
A)  osmosis. 
B)  active transport. 
C)  bulk transport. 
D)  facilitated diffusion. 
E)  diffusion.

Question 8

The greater the concentration of a solution, the greater the

Accepted Answer

A)  osmotic pressure of the solution. 
B)  rate of facilitated diffusion. 
C)  tendency for water to diffuse from the solution. 
D)  number of carrier molecules present. 
E)  amount of solvent. 
A)  osmotic pressure of the solution. 
B)  rate of facilitated diffusion. 
C)  tendency for water to diffuse from the solution. 
D)  number of carrier molecules present. 
E)  amount of solvent.

Question 9

A cell uses centrioles in the process of

Accepted Answer

A)  protein synthesis. 
B)  RNA replication. 
C)  cell division. 
D)  energy generation. 
E)  nuclear centering. 
A)  protein synthesis. 
B)  RNA replication. 
C)  cell division. 
D)  energy generation. 
E)  nuclear centering.

Question 10

Which of the following is NOT true of G-protein complex action?

Accepted Answer

A)  Stimulates a cell by means of extracellular chemical signals. 
B)  Stimulates a cell by opening ion channels in the plasma membrane. 
C)  Acts as an intermediate between a receptor and other cellular proteins. 
D)  Stimulates a cell by activating enzymes associated with the plasma membrane. 
E)  Stimulates a cell by means of intracellular chemical signals. 
A)  Stimulates a cell by means of extracellular chemical signals. 
B)  Stimulates a cell by opening ion channels in the plasma membrane. 
C)  Acts as an intermediate between a receptor and other cellular proteins. 
D)  Stimulates a cell by activating enzymes associated with the plasma membrane. 
E)  Stimulates a cell by means of intracellular chemical signals.

Question 11

Check all that occur at the cellular level as a result of aging.
_____ Cells experience increased metabolic functions.
__X__ Cells experience a decreased ability to maintain homeostasis.
__X__ The process of cell division becomes faulty, resulting in a greater risk for cancer.
_____

Accepted Answer

The risk for unsucce

Question 12

What type of membrane proteins allow cells to identify one another?

Accepted Answer

A)  enzymes 
B)  carrier proteins 
C)  channel protein 
D)  receptor proteins 
E)  marker molecules 
A)  enzymes 
B)  carrier proteins 
C)  channel protein 
D)  receptor proteins 
E)  marker molecules

Question 13

All of the following processes can move substances out of a cell EXCEPT

Accepted Answer

A)  diffusion. 
B)  phagocytosis. 
C)  active transport. 
D)  osmosis. 
E)  exocytosis. 
A)  diffusion. 
B)  phagocytosis. 
C)  active transport. 
D)  osmosis. 
E)  exocytosis.

Question 14

The sodium-potassium pump located in the plasma membrane

Accepted Answer

A)  osmotically moves sodium into cells. 
B)  actively transports potassium into cells. 
C)  actively transports water out of cells. 
D)  moves chlorine out of cells. 
E)  actively transports sodium into cells. 
A)  osmotically moves sodium into cells. 
B)  actively transports potassium into cells. 
C)  actively transports water out of cells. 
D)  moves chlorine out of cells. 
E)  actively transports sodium into cells.

Question 15

What term dealing with cancer means "spreading to a new site"?

Accepted Answer

A)  malignant 
B)  carcinoma 
C)  metastasis 
D)  benign 
E)  sarcoma 
A)  malignant 
B)  carcinoma 
C)  metastasis 
D)  benign 
E)  sarcoma

Question 16

What is mediated transport?

Accepted Answer

A)  The movement of molecules across a membrane by means of a protein carrier. 
B)  The process of peptide synthesis on the surface of the ribosome. 
C)  The ability of molecules to pass through the nuclear membrane. 
D)  The movement of vesicles by intermediate filaments. 
A)  The movement of molecules across a membrane by means of a protein carrier. 
B)  The process of peptide synthesis on the surface of the ribosome. 
C)  The ability of molecules to pass through the nuclear membrane. 
D)  The movement of vesicles by intermediate filaments.

Question 17

The environment outside the plasma membrane is most appropriately referred to as

Accepted Answer

A)  intracellular. 
B)  extracellular. 
C)  multicellular. 
D)  centrocellular. 
E)  None of these choices are correct. 
A)  intracellular. 
B)  extracellular. 
C)  multicellular. 
D)  centrocellular. 
E)  None of these choices are correct.

Question 18

A person suffered burns over a large part of his body. Evaporation of fluid from the surface of burned areas occurs. As a result of the evaporation process, cells will tend to

Accepted Answer

A)  first swell and then resume their original shape. 
B)  rupture. 
C)  swell. 
D)  remain unchanged. 
E)  shrink. 
A)  first swell and then resume their original shape. 
B)  rupture. 
C)  swell. 
D)  remain unchanged. 
E)  shrink.

Question 19

What is the only human cell with a flagellum?

Accepted Answer

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

Question 20

Which of these cells would most likely have the largest number of mitochondria?

Accepted Answer

A)  skin cells 
B)  blood cells 
C)  fat cells 
D)  bone cells 
E)  muscle cells 
A)  skin cells 
B)  blood cells 
C)  fat cells 
D)  bone cells 
E)  muscle cells

Exam 3: Cell Biology

Which of the following events occurs during anaphase?

What is a large, active phagocytic cell?

Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

If 0.9% NaCl (saline) solution is isotonic to a cell, then a 0.5% saline solution

A mRNA containing introns is a

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

The movement of oxygen from the alveoli of the lungs into the bloodstream is an example of

The greater the concentration of a solution, the greater the

A cell uses centrioles in the process of

Which of the following is NOT true of G-protein complex action?

Check all that occur at the cellular level as a result of aging. _____ Cells experience increased metabolic functions. __X__ Cells experience a decreased ability to maintain homeostasis. __X__ The process of cell division becomes faulty, resulting in a greater risk for cancer. _____

What type of membrane proteins allow cells to identify one another?

All of the following processes can move substances out of a cell EXCEPT

The sodium-potassium pump located in the plasma membrane

What term dealing with cancer means "spreading to a new site"?

What is mediated transport?

The environment outside the plasma membrane is most appropriately referred to as

A person suffered burns over a large part of his body. Evaporation of fluid from the surface of burned areas occurs. As a result of the evaporation process, cells will tend to

What is the only human cell with a flagellum?

Which of these cells would most likely have the largest number of mitochondria?

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolyte, and Acid-Based Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Check all that occur at the cellular level as a result of aging. _ Cells experience increased metabolic functions. X Cells experience a decreased ability to maintain homeostasis. X The process of cell division becomes faulty, resulting in a greater risk for cancer. _