Question 1

The organelles that are the source of the spindle fibers are the

Accepted Answer

A)  lysosomes. 
B)  mitochondria. 
C)  centrioles. 
D)  nucleus. 
E)  ribosomes. 
A)  lysosomes. 
B)  mitochondria. 
C)  centrioles. 
D)  nucleus. 
E)  ribosomes.

Question 2

Microtubules

Accepted Answer

A)  are a component of mitochondria. 
B)  are the smallest components of the cytoskeleton. 
C)  provide structure and support to the cytoplasm. 
D)  contain the protein myosin. 
E)  are solid, supporting rods of protein. 
A)  are a component of mitochondria. 
B)  are the smallest components of the cytoskeleton. 
C)  provide structure and support to the cytoplasm. 
D)  contain the protein myosin. 
E)  are solid, supporting rods of protein.

Question 3

Absence of a cytoskeleton might affect

Accepted Answer

A)  cell shape. 
B)  the ability of the cell to generate energy. 
C)  membrane transport. 
D)  vesicle formation. 
E)  the number of channel proteins in the cell membrane. 
A)  cell shape. 
B)  the ability of the cell to generate energy. 
C)  membrane transport. 
D)  vesicle formation. 
E)  the number of channel proteins in the cell membrane.

Question 4

The aroma of cookies baking in the kitchen reaches you in the living room. The distribution of this odor throughout the house is an example of

Accepted Answer

A)  osmosis. 
B)  filtration. 
C)  diffusion. 
D)  dialysis. 
E)  active transport. 
A)  osmosis. 
B)  filtration. 
C)  diffusion. 
D)  dialysis. 
E)  active transport.

Question 5

-Answer these questions about chromosome structure. What does "A" represent?

Accepted Answer

A)  proteins 
B)  chromosome 
C)  chromatid 
D)  chromatin 
E)  centromere 
A)  proteins 
B)  chromosome 
C)  chromatid 
D)  chromatin 
E)  centromere

Question 6

-Answer these questions about chromosome structure. What does "C" represent?

Accepted Answer

A)  chromosome 
B)  proteins 
C)  chromatid 
D)  chromatin 
E)  centromere 
A)  chromosome 
B)  proteins 
C)  chromatid 
D)  chromatin 
E)  centromere

Question 7

If the amino acid coding region of a mRNA molecule is 1800 nucleotides (bases) in length, this molecule will contain _____ codons.

Accepted Answer

A)  1200 
B)  400 
C)  900 
D)  600 
E)  800 
A)  1200 
B)  400 
C)  900 
D)  600 
E)  800

Question 8

The transfer of information from DNA to messenger RNA (mRNA) is known as

Accepted Answer

A)  transcription. 
B)  translocation. 
C)  translation. 
D)  transduction. 
E)  transmutation. 
A)  transcription. 
B)  translocation. 
C)  translation. 
D)  transduction. 
E)  transmutation.

Question 9

In one form of endocytosis a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis. What type of transport is this?

Accepted Answer

A)  Pinocytosis 
B)  Facilitated diffusion 
C)  Receptor-mediated endocytosis 
D)  Active exocytosis 
A)  Pinocytosis 
B)  Facilitated diffusion 
C)  Receptor-mediated endocytosis 
D)  Active exocytosis

Question 10

The bulk uptake of material by the formation of a vesicle is called

Accepted Answer

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

Question 11

What organelles are the sites of protein synthesis?

Accepted Answer

A)  nucleus 
B)  centrioles 
C)  lysosomes 
D)  mitochondria 
E)  ribosomes 
A)  nucleus 
B)  centrioles 
C)  lysosomes 
D)  mitochondria 
E)  ribosomes

Question 12

The time between cell divisions is called

Accepted Answer

A)  metaphase. 
B)  interphase. 
C)  prophase. 
D)  telophase. 
E)  anaphase. 
A)  metaphase. 
B)  interphase. 
C)  prophase. 
D)  telophase. 
E)  anaphase.

Question 13

Which of the following events occurs in the secondary active transport of glucose?

Accepted Answer

A)  Na+ ions and glucose are cotransported by the same carrier molecule. 
B)  The Na+-K+ pump maintains a Na+ concentration gradient inside the cell. 
C)  Energy comes from diffusion of Na+ down their concentration gradient. 
D)  Glucose is moved against its concentration gradient into the cell. 
E)  All of these choices are correct. 
A)  Na+ ions and glucose are cotransported by the same carrier molecule. 
B)  The Na+-K+ pump maintains a Na+ concentration gradient inside the cell. 
C)  Energy comes from diffusion of Na+ down their concentration gradient. 
D)  Glucose is moved against its concentration gradient into the cell. 
E)  All of these choices are correct.

Question 14

Microvilli

Accepted Answer

A)  are supported by microtubules. 
B)  move the cell. 
C)  increase the surface area of the cell. 
D)  are extensions of the lysosomal membrane. 
E)  function to make the cell mobile. 
A)  are supported by microtubules. 
B)  move the cell. 
C)  increase the surface area of the cell. 
D)  are extensions of the lysosomal membrane. 
E)  function to make the cell mobile.

Question 15

In general, water-soluble molecules diffuse through the ______ ______; and lipid-soluble molecules diffuse through the ______ ______.

Accepted Answer

A)  membrane channels; membrane channels 
B)  membrane channels; lipid bilayer 
C)  lipid bilayer; membrane channels 
D)  lipid bilayer; lipid bilayer 
E)  None of these choices is correct. 
A)  membrane channels; membrane channels 
B)  membrane channels; lipid bilayer 
C)  lipid bilayer; membrane channels 
D)  lipid bilayer; lipid bilayer 
E)  None of these choices is correct.

Question 16

Which of the following activities is associated with lysosomes?

Accepted Answer

A)  energy production 
B)  destruction of nonfunctional organelles 
C)  intracellular support 
D)  endocytosis 
E)  exocytosis 
A)  energy production 
B)  destruction of nonfunctional organelles 
C)  intracellular support 
D)  endocytosis 
E)  exocytosis

Question 17

Arrange the following in correct sequence: (1) protein moves through ER and then carried in vesicles to Golgi apparatus
(2) vesicle pinches off from the Golgi apparatus and carries product to plasma membrane
(3) Golgi apparatus modifies protein and then packages them into vesicles
(4) protein made by ribosomes on rough ER

Accepted Answer

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

Question 18

Which transport process requires a carrier molecule but does not use cellular energy?

Accepted Answer

A)  diffusion 
B)  facilitated diffusion 
C)  osmosis 
D)  active transport 
E)  endocytosis 
A)  diffusion 
B)  facilitated diffusion 
C)  osmosis 
D)  active transport 
E)  endocytosis

Question 19

What is the organelle where subunits of ribosomes are manufactured?

Accepted Answer

A)  flagellum 
B)  Golgi apparatus 
C)  nucleolus 
D)  endoplasmic reticulum 
E)  peroxisomes 
A)  flagellum 
B)  Golgi apparatus 
C)  nucleolus 
D)  endoplasmic reticulum 
E)  peroxisomes

Question 20

_____________ pressure is the force required to prevent the movement of water by osmosis across a semipermeable membrane.

Accepted Answer

A)  Filtration 
B)  Hydrolic 
C)  Hydration 
D)  Osmotic 
E)  Fluid 
A)  Filtration 
B)  Hydrolic 
C)  Hydration 
D)  Osmotic 
E)  Fluid

Exam 3: Cell Biology

The organelles that are the source of the spindle fibers are the

Microtubules

Absence of a cytoskeleton might affect

The aroma of cookies baking in the kitchen reaches you in the living room. The distribution of this odor throughout the house is an example of

-Answer these questions about chromosome structure. What does "A" represent?

-Answer these questions about chromosome structure. What does "C" represent?

If the amino acid coding region of a mRNA molecule is 1800 nucleotides (bases) in length, this molecule will contain _____ codons.

The transfer of information from DNA to messenger RNA (mRNA) is known as

In one form of endocytosis a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis. What type of transport is this?

The bulk uptake of material by the formation of a vesicle is called

What organelles are the sites of protein synthesis?

The time between cell divisions is called

Which of the following events occurs in the secondary active transport of glucose?

Microvilli

In general, water-soluble molecules diffuse through the ______ ______; and lipid-soluble molecules diffuse through the ______ ______.

Which of the following activities is associated with lysosomes?

Which transport process requires a carrier molecule but does not use cellular energy?

What is the organelle where subunits of ribosomes are manufactured?

_____________ pressure is the force required to prevent the movement of water by osmosis across a semipermeable membrane.

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

In general, water-soluble molecules diffuse through the ; and lipid-soluble molecules diffuse through the .