Question 1

Hair and intermediate filaments are composed of

Accepted Answer

A)  microtubules. 
B)  microfilaments. 
C)  collagen. 
D)  hydroxyapatite. 
E)  keratin. 
A)  microtubules. 
B)  microfilaments. 
C)  collagen. 
D)  hydroxyapatite. 
E)  keratin.

Question 2

Proteins from the Golgi are transported to the correct location by means of

Accepted Answer

A)  glycoproteins found on the packaged proteins. 
B)  the general flow of vesicles within the cell. 
C)  the control provided by the nucleus. 
D)  motor proteins. 
E)  microtubules. 
A)  glycoproteins found on the packaged proteins. 
B)  the general flow of vesicles within the cell. 
C)  the control provided by the nucleus. 
D)  motor proteins. 
E)  microtubules.

Question 3

Some proteins that are on the surface of mammalian cells contain carbohydrates. These proteins are synthesized by _______ and the sugars added in the _______.

Accepted Answer

A)  mitochondrial ribosomes; smooth endoplasmic reticulum 
B)  the rough endoplasmic reticulum; Golgi apparatus 
C)  cytoplasmic ribosomes; smooth endoplasmic reticulum 
D)  Golgi apparatus; rough endoplasmic reticulum 
E)  cytoplasmic ribosomes; plasma membrane 
A)  mitochondrial ribosomes; smooth endoplasmic reticulum 
B)  the rough endoplasmic reticulum; Golgi apparatus 
C)  cytoplasmic ribosomes; smooth endoplasmic reticulum 
D)  Golgi apparatus; rough endoplasmic reticulum 
E)  cytoplasmic ribosomes; plasma membrane

Question 4

Biological membranes in a eukaryotic cell

Accepted Answer

A)  separate the cell from its environment. 
B)  regulate what goes into and out of the cell. 
C)  help maintain a constant internal environment. 
D)  communicate with adjacent cells. 
E)  All of the above 
A)  separate the cell from its environment. 
B)  regulate what goes into and out of the cell. 
C)  help maintain a constant internal environment. 
D)  communicate with adjacent cells. 
E)  All of the above

Question 5

Proteins that are transported in vesicles are made by

Accepted Answer

A)  the Golgi apparatus. 
B)  ribosomes within the mitochondrion. 
C)  the smooth endoplasmic reticulum. 
D)  ribosomes on the rough endoplasmic reticulum. 
E)  ribosomes within chloroplasts. 
A)  the Golgi apparatus. 
B)  ribosomes within the mitochondrion. 
C)  the smooth endoplasmic reticulum. 
D)  ribosomes on the rough endoplasmic reticulum. 
E)  ribosomes within chloroplasts.

Question 6

Which of the following organelles is not enclosed in a double membrane?

Accepted Answer

A)  Nucleus 
B)  Chloroplast 
C)  Mitochondrion 
D)  RER 
E)  All of the above have double membranes. 
A)  Nucleus 
B)  Chloroplast 
C)  Mitochondrion 
D)  RER 
E)  All of the above have double membranes.

Question 7

Prokaryotes

Accepted Answer

A)  have a cell wall similar in composition to that of plant cells. 
B)  have a nucleus. 
C)  do not have ribosomes. 
D)  are surrounded by a plasma membrane. 
E)  are larger than eukaryotic cells. 
A)  have a cell wall similar in composition to that of plant cells. 
B)  have a nucleus. 
C)  do not have ribosomes. 
D)  are surrounded by a plasma membrane. 
E)  are larger than eukaryotic cells.

Question 8

The membranes of the endoplasmic reticulum are continuous with the membranes of the

Accepted Answer

A)  nucleus. 
B)  Golgi apparatus. 
C)  nucleolus. 
D)  plasma membrane. 
E)  mitochondria. 
A)  nucleus. 
B)  Golgi apparatus. 
C)  nucleolus. 
D)  plasma membrane. 
E)  mitochondria.

Question 9

Nucleic acids are not found in which of the following structures?

Accepted Answer

A)  The nucleus 
B)  Mitochondria 
C)  Plant vacuoles 
D)  Ribosomes 
E)  Prokaryotic cells 
A)  The nucleus 
B)  Mitochondria 
C)  Plant vacuoles 
D)  Ribosomes 
E)  Prokaryotic cells

Question 10

Microfilaments

Accepted Answer

A)  are composed of polysaccharides. 
B)  are composed of actin. 
C)  allow cilia and flagella to move. 
D)  make up the spindle that aids the movement of chromosomes. 
E)  maintain the position of the chloroplast in the cell. 
A)  are composed of polysaccharides. 
B)  are composed of actin. 
C)  allow cilia and flagella to move. 
D)  make up the spindle that aids the movement of chromosomes. 
E)  maintain the position of the chloroplast in the cell.

Question 11

Which one of the processes listed below is not carried out by the smooth endoplasmic reticulum?

Accepted Answer

A)  Protein synthesis 
B)  Modification of proteins 
C)  Chemical modification of foreign molecules, including drugs 
D)  Lipid biosynthesis 
E)  Steroid biosynthesis 
A)  Protein synthesis 
B)  Modification of proteins 
C)  Chemical modification of foreign molecules, including drugs 
D)  Lipid biosynthesis 
E)  Steroid biosynthesis

Question 12

In the mitochondria, "food" molecules are converted to ATP by a process known as

Accepted Answer

A)  cellular respiration. 
B)  metabolism. 
C)  diffusion. 
D)  metabolic processing. 
E)  catabolism. 
A)  cellular respiration. 
B)  metabolism. 
C)  diffusion. 
D)  metabolic processing. 
E)  catabolism.

Question 13

The substances that enter the Golgi come from the _______.

Accepted Answer

ER (or end

Question 14

Movement of cells in both prokaryotes and eukaryotes is accomplished by which of the following structures?

Accepted Answer

A)  Cilia 
B)  Pili 
C)  Dynein 
D)  Cell membranes 
E)  Flagella 
A)  Cilia 
B)  Pili 
C)  Dynein 
D)  Cell membranes 
E)  Flagella

Question 15

Prokaryotic cells generally are smaller than eukaryotic cells because

Accepted Answer

A)  prokaryotes have more diverse energy sources. 
B)  prokaryotes have a capsule that limits cell growth. 
C)  the rigid cell wall of prokaryotes limits cell size. 
D)  prokaryotes lack the genetic material needed for protein synthesis. 
E)  only eukaryotes have compartmentalization, which allows for specialization. 
A)  prokaryotes have more diverse energy sources. 
B)  prokaryotes have a capsule that limits cell growth. 
C)  the rigid cell wall of prokaryotes limits cell size. 
D)  prokaryotes lack the genetic material needed for protein synthesis. 
E)  only eukaryotes have compartmentalization, which allows for specialization.

Question 16

Nuclear DNA exists as a complex of proteins called _______ that condenses into _______ during cellular division.

Accepted Answer

A)  chromosomes; chromatin 
B)  chromatids; chromosomes 
C)  chromophors; chromatin 
D)  chromatin; chromosomes 
E)  None of the above 
A)  chromosomes; chromatin 
B)  chromatids; chromosomes 
C)  chromophors; chromatin 
D)  chromatin; chromosomes 
E)  None of the above

Question 17

The endomembrane system

Accepted Answer

A)  is present in prokaryotes. 
B)  includes the endoplasmic reticulum and the nucleus. 
C)  includes the Golgi apparatus and the endoplasmic reticulum. 
D)  functions to make ATP. 
E)  does not exist in plant cells. 
A)  is present in prokaryotes. 
B)  includes the endoplasmic reticulum and the nucleus. 
C)  includes the Golgi apparatus and the endoplasmic reticulum. 
D)  functions to make ATP. 
E)  does not exist in plant cells.

Question 18

An organelle with an internal cross-section showing a characteristic "9 + 2" morphology is the

Accepted Answer

A)  mitochondrion. 
B)  vacuole. 
C)  Golgi apparatus. 
D)  flagellum. 
E)  cytoskeleton. 
A)  mitochondrion. 
B)  vacuole. 
C)  Golgi apparatus. 
D)  flagellum. 
E)  cytoskeleton.

Question 19

Which of the following structures occupies the largest volume in a mature plant cell?

Accepted Answer

A)  Peroxisome 
B)  Ribosome 
C)  Chloroplast 
D)  Vacuole 
E)  Mitochondrion 
A)  Peroxisome 
B)  Ribosome 
C)  Chloroplast 
D)  Vacuole 
E)  Mitochondrion

Question 20

Rough endoplasmic reticulum and smooth endoplasmic reticulum differ

Accepted Answer

A)  only by the presence (RER) or absence (SER) of ribosomes. 
B)  both in the presence (RER) or absence (SER) of ribosomes and in their function. 
C)  only in microscopic appearance. 
D)  only in their function. 
E)  None of the above 
A)  only by the presence (RER) or absence (SER) of ribosomes. 
B)  both in the presence (RER) or absence (SER) of ribosomes and in their function. 
C)  only in microscopic appearance. 
D)  only in their function. 
E)  None of the above

Exam 5: Cells: the Working Units of Life

Hair and intermediate filaments are composed of

Proteins from the Golgi are transported to the correct location by means of

Some proteins that are on the surface of mammalian cells contain carbohydrates. These proteins are synthesized by _______ and the sugars added in the _______.

Biological membranes in a eukaryotic cell

Proteins that are transported in vesicles are made by

Which of the following organelles is not enclosed in a double membrane?

Prokaryotes

The membranes of the endoplasmic reticulum are continuous with the membranes of the

Nucleic acids are not found in which of the following structures?

Microfilaments

Which one of the processes listed below is not carried out by the smooth endoplasmic reticulum?

In the mitochondria, "food" molecules are converted to ATP by a process known as

The substances that enter the Golgi come from the _______.

Movement of cells in both prokaryotes and eukaryotes is accomplished by which of the following structures?

Prokaryotic cells generally are smaller than eukaryotic cells because

Nuclear DNA exists as a complex of proteins called _______ that condenses into _______ during cellular division.

The endomembrane system

An organelle with an internal cross-section showing a characteristic "9 + 2" morphology is the

Which of the following structures occupies the largest volume in a mature plant cell?

Rough endoplasmic reticulum and smooth endoplasmic reticulum differ

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Population Ecology

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

Filters

Some proteins that are on the surface of mammalian cells contain carbohydrates. These proteins are synthesized by _ and the sugars added in the _.

Nuclear DNA exists as a complex of proteins called _ that condenses into _ during cellular division.