Question 1

Your mature red blood cells lack nuclei and mitochondria.This means that these cells most likely can

Accepted Answer

A)  use ATP but cannot divide. 
B)  make mRNA but cannot make ATP. 
C)  transcribe genes but cannot translate RNA into proteins. 
D)  harvest solar energy but cannot replicate chromosomes. 
E)  transcribe DNA into RNA but cannot use ATP. 
A)  use ATP but cannot divide. 
B)  make mRNA but cannot make ATP. 
C)  transcribe genes but cannot translate RNA into proteins. 
D)  harvest solar energy but cannot replicate chromosomes. 
E)  transcribe DNA into RNA but cannot use ATP.

Question 2

The structure of endoplasmic reticulum is not visible under a light microscope,but it can be seen with an electron microscope because

Accepted Answer

A)  electron beams have more energy than light beams. 
B)  electron microscopes focus light with magnets. 
C)  electron microscopes have more resolving power than light microscopes. 
D)  electrons have such high energy that they pass through biological samples. 
E)  living cells can be observed under the electron microscope. 
A)  electron beams have more energy than light beams. 
B)  electron microscopes focus light with magnets. 
C)  electron microscopes have more resolving power than light microscopes. 
D)  electrons have such high energy that they pass through biological samples. 
E)  living cells can be observed under the electron microscope.

Question 3

Which organelle translates mRNA into polypeptides?

Accepted Answer

A)  Glyoxysome 
B)  Lysosome 
C)  Peroxisome 
D)  Phagosome 
E)  Ribosome 
A)  Glyoxysome 
B)  Lysosome 
C)  Peroxisome 
D)  Phagosome 
E)  Ribosome

Question 4

Some bacteria are able to carry out photosynthesis due to the specialization of

Accepted Answer

A)  their internal membranes. 
B)  other bacteria that they have engulfed. 
C)  their ribosomes. 
D)  their flagellin proteins. 
E)  their chloroplasts. 
A)  their internal membranes. 
B)  other bacteria that they have engulfed. 
C)  their ribosomes. 
D)  their flagellin proteins. 
E)  their chloroplasts.

Question 5

Which of the following is not a function of vacuoles?

Accepted Answer

A)  Contributing to plant survival 
B)  Helping to anchor the cell in place 
C)  Containing pigments that aid in pollination 
D)  Aiding in plant embryo development 
E)  Helping plants maintain turgor pressure 
A)  Contributing to plant survival 
B)  Helping to anchor the cell in place 
C)  Containing pigments that aid in pollination 
D)  Aiding in plant embryo development 
E)  Helping plants maintain turgor pressure

Question 6

One difference between plant cells and animal cells is that

Accepted Answer

A)  plant cells lack mitochondria. 
B)  only animal cells contain centrioles. 
C)  only plant cells have free ribosomes. 
D)  plant cells lack a cytoskeleton. 
E)  only plant cells have peroxisomes. 
A)  plant cells lack mitochondria. 
B)  only animal cells contain centrioles. 
C)  only plant cells have free ribosomes. 
D)  plant cells lack a cytoskeleton. 
E)  only plant cells have peroxisomes.

Question 7

Uniform concentrations of cytoplasmic materials are maintained between plant cells by

Accepted Answer

A)  motor proteins such as kinesin. 
B)  membrane-lined channels called plasmodesmata. 
C)  the semirigid cell wall. 
D)  constantly beating cilia. 
E)  an internal cytoskeleton. 
A)  motor proteins such as kinesin. 
B)  membrane-lined channels called plasmodesmata. 
C)  the semirigid cell wall. 
D)  constantly beating cilia. 
E)  an internal cytoskeleton.

Question 8

Which of the following is/are found in prokaryotic cells?

Accepted Answer

A)  Mitochondria 
B)  Chloroplasts 
C)  Nuclear membrane 
D)  Ribosomes 
E)  Endoplasmic reticulum 
A)  Mitochondria 
B)  Chloroplasts 
C)  Nuclear membrane 
D)  Ribosomes 
E)  Endoplasmic reticulum

Question 9

The cell membrane

Accepted Answer

A)  prevents communication with other cells. 
B)  provides an impermeable barrier between the inside and outside of the cell. 
C)  helps maintain a constant internal environment. 
D)  is covered in proteins that prevent adhesion to surfaces. 
E)  keeps hemoglobin within the plasma of the blood. 
A)  prevents communication with other cells. 
B)  provides an impermeable barrier between the inside and outside of the cell. 
C)  helps maintain a constant internal environment. 
D)  is covered in proteins that prevent adhesion to surfaces. 
E)  keeps hemoglobin within the plasma of the blood.

Question 10

The membrane surrounding each organelle

Accepted Answer

A)  is composed primarily of hydrophobic proteins. 
B)  regulates movement into and out of the organelle. 
C)  is studded with ribosomes. 
D)  allows for interactions among molecules. 
E)  is perforated with pores. 
A)  is composed primarily of hydrophobic proteins. 
B)  regulates movement into and out of the organelle. 
C)  is studded with ribosomes. 
D)  allows for interactions among molecules. 
E)  is perforated with pores.

Question 11

When you give a wilted plant water,will the shape of the plant cells change?

Accepted Answer

A)  Yes,the cells can expand until they burst. 
B)  Yes,they round up. 
C)  Yes,they expand but not beyond the confines of the cell walls. 
D)  No,cells in a wilted plant cannot absorb water. 
E)  No,cells in general do not change shape. 
A)  Yes,the cells can expand until they burst. 
B)  Yes,they round up. 
C)  Yes,they expand but not beyond the confines of the cell walls. 
D)  No,cells in a wilted plant cannot absorb water. 
E)  No,cells in general do not change shape.

Question 12

If you were a medical researcher being consulted about a patient,which condition would most likely require you to use the method of analysis shown in the figure below?

Accepted Answer

A)  Mitochondrial disease 
B)  Coronary artery blockage 
C)  Heart attack 
D)  Athlete's foot 
E)  Broken leg 
A)  Mitochondrial disease 
B)  Coronary artery blockage 
C)  Heart attack 
D)  Athlete's foot 
E)  Broken leg

Question 13

Chromosomes are a series of entangled threads composed of

Accepted Answer

A)  microtubules. 
B)  DNA and protein. 
C)  microfilament proteins. 
D)  cytoskeleton. 
E)  membranes. 
A)  microtubules. 
B)  DNA and protein. 
C)  microfilament proteins. 
D)  cytoskeleton. 
E)  membranes.

Question 14

The rough ER is the portion of the ER that

Accepted Answer

A)  lacks ribosomes. 
B)  is the oldest and was once the smooth ER. 
C)  has ribosomes attached to it. 
D)  is connected to the Golgi apparatus. 
E)  is the site of steroid synthesis. 
A)  lacks ribosomes. 
B)  is the oldest and was once the smooth ER. 
C)  has ribosomes attached to it. 
D)  is connected to the Golgi apparatus. 
E)  is the site of steroid synthesis.

Question 15

Ribosomes are made up of

Accepted Answer

A)  DNA and RNA. 
B)  DNA and proteins. 
C)  RNA and proteins. 
D)  proteins only. 
E)  DNA only. 
A)  DNA and RNA. 
B)  DNA and proteins. 
C)  RNA and proteins. 
D)  proteins only. 
E)  DNA only.

Question 16

Which statement about cell junctions is true?

Accepted Answer

A)  Desmosomes and gap junctions contain keratin,whereas tight junctions contain collagen. 
B)  Gap junctions and tight junctions have specialized protein channels called connexins,whereas desmosomes do not. 
C)  Tight junctions and desmosomes have mechanical roles,whereas gap junctions facilitate communication between cells. 
D)  Desmosomes and gap junctions are found in epithelial tissue,whereas tight junctions are found only in nerve cells. 
E)  All cell junctions have different functions,though structurally they are the same. 
A)  Desmosomes and gap junctions contain keratin,whereas tight junctions contain collagen. 
B)  Gap junctions and tight junctions have specialized protein channels called connexins,whereas desmosomes do not. 
C)  Tight junctions and desmosomes have mechanical roles,whereas gap junctions facilitate communication between cells. 
D)  Desmosomes and gap junctions are found in epithelial tissue,whereas tight junctions are found only in nerve cells. 
E)  All cell junctions have different functions,though structurally they are the same.

Question 17

The semirigid structure that supports the plant cell and determines its shape is the

Accepted Answer

A)  capsule. 
B)  flagellum. 
C)  cell wall. 
D)  cytosol. 
E)  cytoplasm. 
A)  capsule. 
B)  flagellum. 
C)  cell wall. 
D)  cytosol. 
E)  cytoplasm.

Question 18

Most of the cells in the human body (your blood cells,for example)are

Accepted Answer

A)  smaller than a mitochondrion,but larger than most molecules. 
B)  smaller than small molecules,but larger than an atom. 
C)  smaller than the period at the end of this sentence,but larger than most bacteria. 
D)  about the size of the period at the end of this sentence. 
E)  larger than the period at the end of this sentence,but smaller than the width of one of your hairs. 
A)  smaller than a mitochondrion,but larger than most molecules. 
B)  smaller than small molecules,but larger than an atom. 
C)  smaller than the period at the end of this sentence,but larger than most bacteria. 
D)  about the size of the period at the end of this sentence. 
E)  larger than the period at the end of this sentence,but smaller than the width of one of your hairs.

Question 19

Members of the domains Bacteria and Archaea have

Accepted Answer

A)  a nucleus but no nuclear membrane. 
B)  ribosomes but no endoplasmic reticulum. 
C)  chloroplasts but no mitochondria. 
D)  cytoplasm but no cell membrane. 
E)  dissolved ions and molecules but no ribosomes. 
A)  a nucleus but no nuclear membrane. 
B)  ribosomes but no endoplasmic reticulum. 
C)  chloroplasts but no mitochondria. 
D)  cytoplasm but no cell membrane. 
E)  dissolved ions and molecules but no ribosomes.

Question 20

A prokaryotic cell has _______ but does not have _______.

Accepted Answer

A)  a nucleus;membrane-bound organelles 
B)  a nucleus;DNA 
C)  DNA;membrane-bound organelles 
D)  membrane-bound organelles;ribosomes 
E)  RNA;DNA 
A)  a nucleus;membrane-bound organelles 
B)  a nucleus;DNA 
C)  DNA;membrane-bound organelles 
D)  membrane-bound organelles;ribosomes 
E)  RNA;DNA

Exam 4: Cells: the Working Units of Life

Your mature red blood cells lack nuclei and mitochondria.This means that these cells most likely can

The structure of endoplasmic reticulum is not visible under a light microscope,but it can be seen with an electron microscope because

Which organelle translates mRNA into polypeptides?

Some bacteria are able to carry out photosynthesis due to the specialization of

Which of the following is not a function of vacuoles?

One difference between plant cells and animal cells is that

Uniform concentrations of cytoplasmic materials are maintained between plant cells by

Which of the following is/are found in prokaryotic cells?

The cell membrane

The membrane surrounding each organelle

When you give a wilted plant water,will the shape of the plant cells change?

If you were a medical researcher being consulted about a patient,which condition would most likely require you to use the method of analysis shown in the figure below?

Chromosomes are a series of entangled threads composed of

The rough ER is the portion of the ER that

Ribosomes are made up of

Which statement about cell junctions is true?

The semirigid structure that supports the plant cell and determines its shape is the

Most of the cells in the human body (your blood cells,for example)are

Members of the domains Bacteria and Archaea have

A prokaryotic cell has _______ but does not have _______.

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

A prokaryotic cell has _ but does not have _.