Question 1

In DNA replication,

Accepted Answer

A)  new nucleotides are added at the 5' end of the growing DNA strand. 
B)  only introns are replicated. 
C)  DNA polymerase splices the short segments of the lagging strand together. 
D)  the two existing strands are not used as templates. 
E)  the leading strand is formed as a continuous strand. 
A)  new nucleotides are added at the 5' end of the growing DNA strand. 
B)  only introns are replicated. 
C)  DNA polymerase splices the short segments of the lagging strand together. 
D)  the two existing strands are not used as templates. 
E)  the leading strand is formed as a continuous strand.

Question 2

What organelles produce most of the cell's energy?

Accepted Answer

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

Question 3

Which type of transport proteins use cell energy to move molecules across the plasma membrane?

Accepted Answer

A)  cadherins 
B)  leak-ion channels 
C)  ATP-powered pumps 
D)  ligand-gated ion channels 
A)  cadherins 
B)  leak-ion channels 
C)  ATP-powered pumps 
D)  ligand-gated ion channels

Question 4

Genes that play a role in the regulation of mitosis are called

Accepted Answer

A)  proto-oncogenes. 
B)  apoptogenes. 
C)  oncogenes. 
D)  mutagens. 
E)  basal cells. 
A)  proto-oncogenes. 
B)  apoptogenes. 
C)  oncogenes. 
D)  mutagens. 
E)  basal cells.

Question 5

If you compare a cell with a manufacturing plant that exports goods, the cell's _____ could be compared to the manufacturing plant's shipping department.

Accepted Answer

A)  nucleus 
B)  lysosome 
C)  Golgi apparatus 
D)  endoplasmic reticulum 
E)  ribosome 
A)  nucleus 
B)  lysosome 
C)  Golgi apparatus 
D)  endoplasmic reticulum 
E)  ribosome

Question 6

Osmosis is the diffusion of _____ across a selectively permeable membrane.

Accepted Answer

A)  sugar 
B)  sodium 
C)  oxygen 
D)  urea 
E)  water 
A)  sugar 
B)  sodium 
C)  oxygen 
D)  urea 
E)  water

Question 7

Which of the following organelles function in the destruction of nonfunctional organelles?

Accepted Answer

A)  basal bodies 
B)  centrioles 
C)  mitochondria 
D)  endoplasmic reticulum 
E)  lysosomes 
A)  basal bodies 
B)  centrioles 
C)  mitochondria 
D)  endoplasmic reticulum 
E)  lysosomes

Question 8

DNA replication results in two new DNA molecules. Each of these new molecules

Accepted Answer

A)  has one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides. 
B)  has two newly synthesized strands of nucleotides. 
C)  has a single strand of nucleotides. 
D)  are incomplete copies of the original. 
E)  has two strands of nucleotides from the parent. 
A)  has one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides. 
B)  has two newly synthesized strands of nucleotides. 
C)  has a single strand of nucleotides. 
D)  are incomplete copies of the original. 
E)  has two strands of nucleotides from the parent.

Question 9

Which of the following is NOT a characteristic function of a cell?

Accepted Answer

A)  reproduction and inheritance 
B)  communication 
C)  movement 
D)  metabolism and energy use 
E)  synthesis 
A)  reproduction and inheritance 
B)  communication 
C)  movement 
D)  metabolism and energy use 
E)  synthesis

Question 10

Which of the following is an organelle of locomotion?

Accepted Answer

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

Question 11

Membrane proteins that extend into the lipid bilayer are called

Accepted Answer

A)  integral proteins. 
B)  lipoproteins. 
C)  peripheral proteins. 
D)  glycoproteins. 
E)  extrinsic proteins. 
A)  integral proteins. 
B)  lipoproteins. 
C)  peripheral proteins. 
D)  glycoproteins. 
E)  extrinsic proteins.

Question 12

Endoplasmic reticulum with ribosomes attached to it is called

Accepted Answer

A)  nodular ER. 
B)  smooth ER. 
C)  dendritic ER. 
D)  rough ER. 
E)  bumpy ER. 
A)  nodular ER. 
B)  smooth ER. 
C)  dendritic ER. 
D)  rough ER. 
E)  bumpy ER.

Question 13

Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is (are) directly involved in carrying out communication between cells?

Accepted Answer

A)  lipid bilayer of the plasma membrane 
B)  both receptor proteins of the plasma membrane and chemical signal molecules released by cells 
C)  receptor proteins of the plasma membrane 
D)  mitochondria 
E)  chemical signal molecules released by cells 
A)  lipid bilayer of the plasma membrane 
B)  both receptor proteins of the plasma membrane and chemical signal molecules released by cells 
C)  receptor proteins of the plasma membrane 
D)  mitochondria 
E)  chemical signal molecules released by cells

Question 14

A cell's ability to replenish ATP is reduced by a metabolic poison. Which organelle is being affected?

Accepted Answer

A)  nucleus 
B)  mitochondrion 
C)  centriole 
D)  ribosomes 
E)  microtubule 
A)  nucleus 
B)  mitochondrion 
C)  centriole 
D)  ribosomes 
E)  microtubule

Question 15

If all of the peroxisomes in a cell were suddenly removed, how would this affect its immediate activity and function?

Accepted Answer

A)  The cell would no longer be able to break down glucose. 
B)  The cell would be unable to perform transcription. 
C)  The cell would no longer be able to break down fatty acids, hydrogen peroxide, and amino acids. 
D)  The cell would be unable to produce proteins. 
E)  The cell would no longer be able to break down proteins and nucleic acids. 
A)  The cell would no longer be able to break down glucose. 
B)  The cell would be unable to perform transcription. 
C)  The cell would no longer be able to break down fatty acids, hydrogen peroxide, and amino acids. 
D)  The cell would be unable to produce proteins. 
E)  The cell would no longer be able to break down proteins and nucleic acids.

Question 16

Cytokinesis is completed at the end of this phase.

Accepted Answer

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

Question 17

Posttranscriptional processing is the modification of

Accepted Answer

A)  DNA. 
B)  proteins to form pro-proteins. 
C)  mRNA to form tRNA. 
D)  exons to form introns. 
E)  pre-mRNA to form functional mRNA. 
A)  DNA. 
B)  proteins to form pro-proteins. 
C)  mRNA to form tRNA. 
D)  exons to form introns. 
E)  pre-mRNA to form functional mRNA.

Question 18

What type of membrane proteins form a passageway through the plasma membrane?

Accepted Answer

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

Question 19

Chromatin condenses and nucleoli disappear during

Accepted Answer

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

Question 20

Which of the following correctly matches a nuclear structure with its function?

Accepted Answer

A)  nuclear pores - allow molecules to move between the nucleus and cytoplasm. 
B)  chromatin - fluid portion of the nucleus 
C)  chromosomes - contains RNA and histones 
D)  nuclear envelope - contains the nucleolar organizer 
E)  nucleolus - DNA synthesis 
A)  nuclear pores - allow molecules to move between the nucleus and cytoplasm. 
B)  chromatin - fluid portion of the nucleus 
C)  chromosomes - contains RNA and histones 
D)  nuclear envelope - contains the nucleolar organizer 
E)  nucleolus - DNA synthesis

Exam 3: Cell Biology

In DNA replication,

What organelles produce most of the cell's energy?

Which type of transport proteins use cell energy to move molecules across the plasma membrane?

Genes that play a role in the regulation of mitosis are called

If you compare a cell with a manufacturing plant that exports goods, the cell's _____ could be compared to the manufacturing plant's shipping department.

Osmosis is the diffusion of _____ across a selectively permeable membrane.

Which of the following organelles function in the destruction of nonfunctional organelles?

DNA replication results in two new DNA molecules. Each of these new molecules

Which of the following is NOT a characteristic function of a cell?

Which of the following is an organelle of locomotion?

Membrane proteins that extend into the lipid bilayer are called

Endoplasmic reticulum with ribosomes attached to it is called

Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is (are) directly involved in carrying out communication between cells?

A cell's ability to replenish ATP is reduced by a metabolic poison. Which organelle is being affected?

If all of the peroxisomes in a cell were suddenly removed, how would this affect its immediate activity and function?

Cytokinesis is completed at the end of this phase.

Posttranscriptional processing is the modification of

What type of membrane proteins form a passageway through the plasma membrane?

Chromatin condenses and nucleoli disappear during

Which of the following correctly matches a nuclear structure with its function?

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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