Question 1

All of the chemical reactions within a cell are known as cell ________.

Accepted Answer

A)  reproduction 
B)  metabolism 
C)  communication 
D)  inheritance 
E)  movement 
A)  reproduction 
B)  metabolism 
C)  communication 
D)  inheritance 
E)  movement

Question 2

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

Accepted Answer

A)  Marker molecules 
B)  Channel protein 
C)  Receptor proteins 
D)  Enzymes 
E)  Carrier proteins 
A)  Marker molecules 
B)  Channel protein 
C)  Receptor proteins 
D)  Enzymes 
E)  Carrier proteins

Question 3

Which of the following is NOT true of a transmission electron microscope (TEM)?

Accepted Answer

A)  The limit of resolution is about 0.1μm. 
B)  Electrons are passed through the specimen. 
C)  It gives the clearest three-dimensional images. 
D)  The specimen must be fixed in plastic. 
E)  The electron beam is focused with electromagnets. 
A)  The limit of resolution is about 0.1μm. 
B)  Electrons are passed through the specimen. 
C)  It gives the clearest three-dimensional images. 
D)  The specimen must be fixed in plastic. 
E)  The electron beam is focused with electromagnets.

Question 4

Which of the following is CORRECTLY matched with its function?

Accepted Answer

A)  Channel proteins - are part of an intercellular communication system 
B)  Marker molecules - are primarily steroids 
C)  Receptor proteins - attach to ligand molecules 
D)  Peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  Nongated ion channels - are always closed 
A)  Channel proteins - are part of an intercellular communication system 
B)  Marker molecules - are primarily steroids 
C)  Receptor proteins - attach to ligand molecules 
D)  Peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  Nongated ion channels - are always closed

Question 5

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

Accepted Answer

A)  Chromatid 
B)  Proteins 
C)  Chromosome 
D)  Centromere 
E)  Chromatin 
A)  Chromatid 
B)  Proteins 
C)  Chromosome 
D)  Centromere 
E)  Chromatin

Question 6

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

Accepted Answer

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

Question 7

The presence of a cellular clock, presence of "death genes," and damage to DNA or mitochondria are all hypotheses of ________.

Accepted Answer

A)  aging 
B)  death 
C)  differentiation 
D)  cleavage 
A)  aging 
B)  death 
C)  differentiation 
D)  cleavage

Question 8

-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "B" relative to the RBC?

Accepted Answer

A)  Hypotonic solution 
B)  Hypertonic solution 
C)  Isotonic solution 
A)  Hypotonic solution 
B)  Hypertonic solution 
C)  Isotonic solution

Question 9

In which structure are subunits of ribosomes manufactured?

Accepted Answer

A)  Endoplasmic reticulum 
B)  Golgi apparatus 
C)  Nucleolus 
D)  Peroxisomes 
E)  Flagellum 
A)  Endoplasmic reticulum 
B)  Golgi apparatus 
C)  Nucleolus 
D)  Peroxisomes 
E)  Flagellum

Question 10

Posttranscriptional processing is the modification of

Accepted Answer

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

Question 11

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

Accepted Answer

A)  Chromatid 
B)  Proteins 
C)  Chromosome 
D)  Centromere 
E)  Chromatin 
A)  Chromatid 
B)  Proteins 
C)  Chromosome 
D)  Centromere 
E)  Chromatin

Question 12

The "control center" of the cell is the ________.

Accepted Answer

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

Question 13

Absence of a cytoskeleton might affect

Accepted Answer

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

Question 14

Cilia and flagella are distinguished from each other on the basis of

Accepted Answer

A)  width and numbers. 
B)  length and numbers. 
C)  depth and numbers. 
D)  length and width. 
E)  None of the choices are correct. 
A)  width and numbers. 
B)  length and numbers. 
C)  depth and numbers. 
D)  length and width. 
E)  None of the choices are correct.

Question 15

Messenger RNA

Accepted Answer

A)  is synthesized when a portion of a DNA molecule is transcribed. 
B)  directs the synthesis of DNA. 
C)  determines the sequence of nucleotides in the anticodons of tRNA. 
D)  directs the synthesis of centrioles in the cytoplasm. 
E)  is not involved in the synthesis of proteins. 
A)  is synthesized when a portion of a DNA molecule is transcribed. 
B)  directs the synthesis of DNA. 
C)  determines the sequence of nucleotides in the anticodons of tRNA. 
D)  directs the synthesis of centrioles in the cytoplasm. 
E)  is not involved in the synthesis of proteins.

Question 16

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 the choices are true. 
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 the choices are true.

Question 17

Which of the following is CORRECTLY matched with its description?

Accepted Answer

A)  Channel proteins - catalyze chemical reactions inside the cell 
B)  Cell identity molecules - are primarily steroids 
C)  Receptor proteins - move specific ions or molecules using ATP 
D)  Peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  Carrier proteins - move bound ions or molecules from one side of the membrane to the other 
A)  Channel proteins - catalyze chemical reactions inside the cell 
B)  Cell identity molecules - are primarily steroids 
C)  Receptor proteins - move specific ions or molecules using ATP 
D)  Peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  Carrier proteins - move bound ions or molecules from one side of the membrane to the other

Question 18

The function of the Golgi apparatus is

Accepted Answer

A)  packaging and distribution of proteins and lipids. 
B)  production of microtubules. 
C)  excretion of excess salt. 
D)  DNA replication. 
E)  energy production. 
A)  packaging and distribution of proteins and lipids. 
B)  production of microtubules. 
C)  excretion of excess salt. 
D)  DNA replication. 
E)  energy production.

Question 19

Microtubules

Accepted Answer

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

Question 20

The vesicles containing hydrolytic enzymes are called ________.

Accepted Answer

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

Exam 3: Cell Biology

All of the chemical reactions within a cell are known as cell ________.

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

Which of the following is NOT true of a transmission electron microscope (TEM)?

Which of the following is CORRECTLY matched with its function?

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

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

The presence of a cellular clock, presence of "death genes," and damage to DNA or mitochondria are all hypotheses of ________.

-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "B" relative to the RBC?

In which structure are subunits of ribosomes manufactured?

Posttranscriptional processing is the modification of

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

The "control center" of the cell is the ________.

Absence of a cytoskeleton might affect

Cilia and flagella are distinguished from each other on the basis of

Messenger RNA

Which of the following is NOT true of a gene?

Which of the following is CORRECTLY matched with its description?

The function of the Golgi apparatus is

Microtubules

The vesicles containing hydrolytic enzymes are called ________.

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint 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-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

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