Question 1

What molecule(s) cause(s) a portion of a DNA molecule to unwind for transcription?

Accepted Answer

A)  poly-A tail 
B)  transcription factors 
C)  spliceosomes 
D)  RNA ploymerase 
E)  7-methylguanosine cap 
A)  poly-A tail 
B)  transcription factors 
C)  spliceosomes 
D)  RNA ploymerase 
E)  7-methylguanosine cap

Question 2

What type of attachment proteins attach cells to extracellular molecules?

Accepted Answer

A)  ligands 
B)  adherins 
C)  cadherins 
D)  integrins 
A)  ligands 
B)  adherins 
C)  cadherins 
D)  integrins

Question 3

Transcription

Accepted Answer

A)  occurs at the ribosomes. 
B)  synthesizes RNA from DNA. 
C)  synthesizes DNA from RNA. 
D)  copies information from mRNA to tRNA. 
E)  requires three types of RNA. 
A)  occurs at the ribosomes. 
B)  synthesizes RNA from DNA. 
C)  synthesizes DNA from RNA. 
D)  copies information from mRNA to tRNA. 
E)  requires three types of RNA.

Question 4

Which of the following are consistent with facilitated diffusion? (1) movement is against a concentration gradient
(2) movement is with a concentration gradient
(3) involves a carrier molecule
(4) involves cotransport
(5) involves counter transport
(6) exhibits competition and saturation

Accepted Answer

A)  1, 2, 4, 5, 6 
B)  2, 3, 5, 6 
C)  2, 3, 4, 6 
D)  1, 3, 4, 5, 6 
E)  2, 3, 6 
A)  1, 2, 4, 5, 6 
B)  2, 3, 5, 6 
C)  2, 3, 4, 6 
D)  1, 3, 4, 5, 6 
E)  2, 3, 6

Question 5

The "control center" of the cell is the

Accepted Answer

A)  endoplasmic reticulum. 
B)  mitochondrion. 
C)  nucleus. 
D)  plasma membrane. 
E)  ribosome. 
A)  endoplasmic reticulum. 
B)  mitochondrion. 
C)  nucleus. 
D)  plasma membrane. 
E)  ribosome.

Question 6

Which of the following is NOT true of a gene?

Accepted Answer

A)  It is all the triplets needed to make a functional RNA or protein. 
B)  It is a segment of a DNA molecule. 
C)  Each chromosome contains one gene. 
D)  It is the functional unit of heredity. 
E)  All of these are true of a gene. 
A)  It is all the triplets needed to make a functional RNA or protein. 
B)  It is a segment of a DNA molecule. 
C)  Each chromosome contains one gene. 
D)  It is the functional unit of heredity. 
E)  All of these are true of a gene.

Question 7

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

Accepted Answer

A) site of protein synthesis 
B)  major site of ATP synthesis when oxygen is available 
C)  outer boundary of cell, controls entry and exit of substances 
D)  contains digestive enzymes 
E)  directs cellular activities, contains DNA 
A) site of protein synthesis 
B)  major site of ATP synthesis when oxygen is available 
C)  outer boundary of cell, controls entry and exit of substances 
D)  contains digestive enzymes 
E)  directs cellular activities, contains DNA

Question 8

Translation

Accepted Answer

A)  takes place in the nucleus. 
B)  requires three types of DNA. 
C)  requires the pairing of codons on mRNA with anticodons on tRNA. 
D)  involves synthesis of RNA from DNA molecules. 
E)  requires replication of DNA. 
A)  takes place in the nucleus. 
B)  requires three types of DNA. 
C)  requires the pairing of codons on mRNA with anticodons on tRNA. 
D)  involves synthesis of RNA from DNA molecules. 
E)  requires replication of DNA.

Question 9

Cells that respond to ligands

Accepted Answer

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

Question 10

Of the organelles listed, which one does NOT contain microtubules?

Accepted Answer

A)  microvilli 
B)  flagella 
C)  centrioles 
D)  cilia 
E)  spindle fibers 
A)  microvilli 
B)  flagella 
C)  centrioles 
D)  cilia 
E)  spindle fibers

Question 11

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

Accepted Answer

A)  major site of ATP synthesis when oxygen is available 
B)  contains digestive enzymes 
C)  site of protein synthesis 
D)  directs cellular activities, contains DNA 
E)  outer boundary of cell, controls entry and exit of substances 
A)  major site of ATP synthesis when oxygen is available 
B)  contains digestive enzymes 
C)  site of protein synthesis 
D)  directs cellular activities, contains DNA 
E)  outer boundary of cell, controls entry and exit of substances

Question 12

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "D"?

Accepted Answer

A)  major site of ATP synthesis when oxygen is available 
B)  contains digestive enzymes 
C)  outer boundary of cell, controls entry and exit of substances 
D)  directs cellular activities, contains DNA 
E)  site of protein synthesis 
A)  major site of ATP synthesis when oxygen is available 
B)  contains digestive enzymes 
C)  outer boundary of cell, controls entry and exit of substances 
D)  directs cellular activities, contains DNA 
E)  site of protein synthesis

Question 13

The centrioles are found in a zone of cytoplasm close to the nucleus called the

Accepted Answer

A)  vacuole. 
B)  cytogel. 
C)  centrosome. 
D)  cytosol. 
E)  proteasome. 
A)  vacuole. 
B)  cytogel. 
C)  centrosome. 
D)  cytosol. 
E)  proteasome.

Question 14

The plasma membrane is selectively permeable. This means

Accepted Answer

A)  substances need permission to pass through it. 
B)  ATP is always needed to move molecules across the plasma membrane. 
C)  substances need carrier molecules to pass through it. 
D)  only gases and water can pass through it. 
E)  only certain substances can pass through it. 
A)  substances need permission to pass through it. 
B)  ATP is always needed to move molecules across the plasma membrane. 
C)  substances need carrier molecules to pass through it. 
D)  only gases and water can pass through it. 
E)  only certain substances can pass through it.

Question 15

Ribosomes are organelles responsible for

Accepted Answer

A)  packaging "cell products" for export. 
B)  energy production. 
C)  cell movement and cell shape. 
D)  protein synthesis. 
E)  manufacturing lipids. 
A)  packaging "cell products" for export. 
B)  energy production. 
C)  cell movement and cell shape. 
D)  protein synthesis. 
E)  manufacturing lipids.

Question 16

-What structure does "A" represent on the diagram of the plasma membrane?

Accepted Answer

A)  phospholipid bilayer 
B)  internal membrane surface 
C)  integral protein 
D)  peripheral protein 
E)  membrane channel protein 
A)  phospholipid bilayer 
B)  internal membrane surface 
C)  integral protein 
D)  peripheral protein 
E)  membrane channel protein

Question 17

The main components of the plasma membrane are

Accepted Answer

A)  lipids and ions. 
B)  ions, lipids, and proteins. 
C)  proteins, lipids, and carbohydrates. 
D)  carbohydrates, ions, and lipids. 
E)  proteins and carbohydrates. 
A)  lipids and ions. 
B)  ions, lipids, and proteins. 
C)  proteins, lipids, and carbohydrates. 
D)  carbohydrates, ions, and lipids. 
E)  proteins and carbohydrates.

Question 18

The movement of water through a selectively permeable membrane is called

Accepted Answer

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

Question 19

Ion movement across the plasma membrane creates an electrical charge difference known as ______.

Accepted Answer

A)  extracellular glycocalyx 
B)  transcription 
C)  respiration 
D)  membrane potential 
A)  extracellular glycocalyx 
B)  transcription 
C)  respiration 
D)  membrane potential

Question 20

In ______________, carrier molecules move a substance against (up) the concentration gradient.

Accepted Answer

A)  facilitated diffusion 
B)  simple diffusion 
C)  endocytosis 
D)  active transport 
E)  exocytosis 
A)  facilitated diffusion 
B)  simple diffusion 
C)  endocytosis 
D)  active transport 
E)  exocytosis

Exam 3: Cell Biology

What molecule(s) cause(s) a portion of a DNA molecule to unwind for transcription?

What type of attachment proteins attach cells to extracellular molecules?

Transcription

Which of the following are consistent with facilitated diffusion? (1) movement is against a concentration gradient (2) movement is with a concentration gradient (3) involves a carrier molecule (4) involves cotransport (5) involves counter transport (6) exhibits competition and saturation

The "control center" of the cell is the

Which of the following is NOT true of a gene?

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

Translation

Cells that respond to ligands

Of the organelles listed, which one does NOT contain microtubules?

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "D"?

The centrioles are found in a zone of cytoplasm close to the nucleus called the

The plasma membrane is selectively permeable. This means

Ribosomes are organelles responsible for

-What structure does "A" represent on the diagram of the plasma membrane?

The main components of the plasma membrane are

The movement of water through a selectively permeable membrane is called

Ion movement across the plasma membrane creates an electrical charge difference known as ______.

In ______________, carrier molecules move a substance against (up) the concentration gradient.

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

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