Question 1

Some bacteria have membranes around their DNA.What is lacking in these membranes that we do not call them nuclei?

Accepted Answer

A)  pores 
B)  proteins 
C)  phospholipids 
D)  a bilayer construction 
E)  more than one of these is lacking 
A)  pores 
B)  proteins 
C)  phospholipids 
D)  a bilayer construction 
E)  more than one of these is lacking A

Question 2

The following structures are found in all eukaryotic cells EXCEPT

Accepted Answer

A)  cell walls. 
B)  the nucleus. 
C)  plasma membranes. 
D)  Golgi bodies. 
E)  the endoplasmic reticulum. 
A)  cell walls. 
B)  the nucleus. 
C)  plasma membranes. 
D)  Golgi bodies. 
E)  the endoplasmic reticulum. A

Question 3

A flagellum is to a bacterium as ____ is to a boat.

Accepted Answer

A)  a captain 
B)  an engine 
C)  a propeller 
D)  a bow 
E)  an anchor 
A)  a captain 
B)  an engine 
C)  a propeller 
D)  a bow 
E)  an anchor C

Question 4

In the fluid mosaic model of a typical plasma membrane,what accounts for the fluidity?

Accepted Answer

A)  the proteins, being large, cause the membrane to jiggle around. 
B)  the phospholipids collectively form a jelly-like substance similar to the cytoplasm. 
C)  the phospholipids are not bonded to each other and thus are more free to move around. 
D)  water molecules infiltrate the bilayer causing it to become more watery and thus more fluid. 
E)  the phospholipids in a typical plasma membrane form covalent bonds which are elastic and allow the membrane to 'stretch'. 
A)  the proteins, being large, cause the membrane to jiggle around. 
B)  the phospholipids collectively form a jelly-like substance similar to the cytoplasm. 
C)  the phospholipids are not bonded to each other and thus are more free to move around. 
D)  water molecules infiltrate the bilayer causing it to become more watery and thus more fluid. 
E)  the phospholipids in a typical plasma membrane form covalent bonds which are elastic and allow the membrane to 'stretch'.

Question 5

Which of the following is NOT an example of an extracellular matrix?

Accepted Answer

A)  cuticles of plants 
B)  cuticles of crabs 
C)  cell walls 
D)  cell membranes 
E)  basement membranes 
A)  cuticles of plants 
B)  cuticles of crabs 
C)  cell walls 
D)  cell membranes 
E)  basement membranes

Question 6

A transport protein is analogous to a

Accepted Answer

A)  wall partition. 
B)  subway train. 
C)  light switch. 
D)  voice identification device. 
E)  television receiver. 
A)  wall partition. 
B)  subway train. 
C)  light switch. 
D)  voice identification device. 
E)  television receiver.

Question 7

Match the organelle with the appropriate statement.
-The packaging of secretory proteins occurs in association with this structure.

Accepted Answer

A) nucleus 
B) mitochondrion 
C) lysosome 
D) Golgi body 
E) rough endoplasmic reticulum 
A) nucleus 
B) mitochondrion 
C) lysosome 
D) Golgi body 
E) rough endoplasmic reticulum

Question 8

A basement membrane

Accepted Answer

A)  is a cell membrane. 
B)  is a specialized lipid bilayer. 
C)  forms on the surface of plant cells. 
D)  supports and organizes animal cell membranes. 
E)  is a sheet of non-fibrous material. 
A)  is a cell membrane. 
B)  is a specialized lipid bilayer. 
C)  forms on the surface of plant cells. 
D)  supports and organizes animal cell membranes. 
E)  is a sheet of non-fibrous material.

Question 9

Match each cell structure represented by a letter with the appropriate question number.
-construction sites where subunits of ribosomes are built from RNA and proteins

Accepted Answer

A) peroxisomes 
B) chloroplasts 
C) Golgi bodies 
D) DNA molecules 
E) RNA molecules
F)central vacuoles
G)lysosomes
H)mitochondria
I)nucleoli
J)ribosomes 
A) peroxisomes 
B) chloroplasts 
C) Golgi bodies 
D) DNA molecules 
E) RNA molecules
F)central vacuoles
G)lysosomes
H)mitochondria
I)nucleoli
J)ribosomes

Question 10

Which organelle has enzymes that break down fatty acids,amino acids,and toxins?

Accepted Answer

A)  lysosomes 
B)  peroxisomes 
C)  Golgi bodies 
D)  vacuoles 
E)  rough ER 
A)  lysosomes 
B)  peroxisomes 
C)  Golgi bodies 
D)  vacuoles 
E)  rough ER

Question 11

Which of the following organelles has its own DNA and ribosomes?

Accepted Answer

A)  chloroplasts 
B)  rough endoplasmic reticulum 
C)  smooth endoplasmic reticulum 
D)  lysosomes 
E)  none of these organelles has its own DNA and ribosomes 
A)  chloroplasts 
B)  rough endoplasmic reticulum 
C)  smooth endoplasmic reticulum 
D)  lysosomes 
E)  none of these organelles has its own DNA and ribosomes

Question 12

The phospholipids of plasma membranes have

Accepted Answer

A)  a hydrophobic head and a hydrophilic tail. 
B)  a hydrophobic head and a hydrophobic tail. 
C)  a hydrophobic head and two hydrophobic tails. 
D)  a hydrophilic head and two hydrophobic tails. 
E)  a hydrophilic head and two hydrophilic tails. 
A)  a hydrophobic head and a hydrophilic tail. 
B)  a hydrophobic head and a hydrophobic tail. 
C)  a hydrophobic head and two hydrophobic tails. 
D)  a hydrophilic head and two hydrophobic tails. 
E)  a hydrophilic head and two hydrophilic tails.

Question 13

MATCHING
Examine the following figure and answer,matching each letter of the figure with the appropriate question number.
  
-pilus

Accepted Answer

The answer of MATCHING
Examine the following figure and answer,matching each...

Question 14

What is a biofilm?

Accepted Answer

A)  a movie about biology 
B)  a slimy covering around a bacterium that allows it to stick to surfaces 
C)  a colony of prokaryotes and eukaryotes living together in a slime 
D)  a substance put on microscope slides that allow microscopic details to be better seen 
E)  a shiny substance that develops above an oil slick 
A)  a movie about biology 
B)  a slimy covering around a bacterium that allows it to stick to surfaces 
C)  a colony of prokaryotes and eukaryotes living together in a slime 
D)  a substance put on microscope slides that allow microscopic details to be better seen 
E)  a shiny substance that develops above an oil slick

Question 15

The organelle that pinches off portions of its membrane to form a vesicle used for storage or transport is the

Accepted Answer

A)  mitochondrion. 
B)  chloroplast. 
C)  nucleus. 
D)  Golgi body. 
E)  ribosome. 
A)  mitochondrion. 
B)  chloroplast. 
C)  nucleus. 
D)  Golgi body. 
E)  ribosome.

Question 16

The relative impermeability of membranes to water soluble molecules is a result of

Accepted Answer

A)  the nonpolar nature of water. 
B)  the presence of large proteins that extend through both sides of membranes. 
C)  the presence of inorganic salt crystals scattered through some membranes. 
D)  the presence of cellulose and waxes. 
E)  the presence of phospholipids in the lipid bilayer. 
A)  the nonpolar nature of water. 
B)  the presence of large proteins that extend through both sides of membranes. 
C)  the presence of inorganic salt crystals scattered through some membranes. 
D)  the presence of cellulose and waxes. 
E)  the presence of phospholipids in the lipid bilayer.

Question 17

Which of the following are primarily cellular sites for the recapture of energy from organic compounds?

Accepted Answer

A)  Golgi bodies 
B)  mitochondria 
C)  lysosomes 
D)  ribosomes 
E)  endoplasmic reticulum 
A)  Golgi bodies 
B)  mitochondria 
C)  lysosomes 
D)  ribosomes 
E)  endoplasmic reticulum

Question 18

Match the organelle with the appropriate statement.
-Production of ATP occurs in this organelle.

Accepted Answer

A) nucleus 
B) mitochondrion 
C) lysosome 
D) Golgi body 
E) rough endoplasmic reticulum 
A) nucleus 
B) mitochondrion 
C) lysosome 
D) Golgi body 
E) rough endoplasmic reticulum

Question 19

A prokaryote's cell shape is reinforced by

Accepted Answer

A)  phospholipids. 
B)  DNA. 
C)  protein filaments. 
D)  transport proteins. 
E)  ribosomes. 
A)  phospholipids. 
B)  DNA. 
C)  protein filaments. 
D)  transport proteins. 
E)  ribosomes.

Question 20

Match each cell structure represented by a letter with the appropriate question number.
-receive and process new substances that arrive in vesicles from ER

Accepted Answer

A) peroxisomes 
B) chloroplasts 
C) Golgi bodies 
D) DNA molecules 
E) RNA molecules
F)central vacuoles
G)lysosomes
H)mitochondria
I)nucleoli
J)ribosomes 
A) peroxisomes 
B) chloroplasts 
C) Golgi bodies 
D) DNA molecules 
E) RNA molecules
F)central vacuoles
G)lysosomes
H)mitochondria
I)nucleoli
J)ribosomes

Exam 3: Cell Structure

Some bacteria have membranes around their DNA.What is lacking in these membranes that we do not call them nuclei?

The following structures are found in all eukaryotic cells EXCEPT

A flagellum is to a bacterium as ____ is to a boat.

In the fluid mosaic model of a typical plasma membrane,what accounts for the fluidity?

Which of the following is NOT an example of an extracellular matrix?

A transport protein is analogous to a

Match the organelle with the appropriate statement. -The packaging of secretory proteins occurs in association with this structure.

A basement membrane

Match each cell structure represented by a letter with the appropriate question number. -construction sites where subunits of ribosomes are built from RNA and proteins

Which organelle has enzymes that break down fatty acids,amino acids,and toxins?

Which of the following organelles has its own DNA and ribosomes?

The phospholipids of plasma membranes have

MATCHING Examine the following figure and answer,matching each letter of the figure with the appropriate question number. -pilus

What is a biofilm?

The organelle that pinches off portions of its membrane to form a vesicle used for storage or transport is the

The relative impermeability of membranes to water soluble molecules is a result of

Which of the following are primarily cellular sites for the recapture of energy from organic compounds?

Match the organelle with the appropriate statement. -Production of ATP occurs in this organelle.

A prokaryote's cell shape is reinforced by

Match each cell structure represented by a letter with the appropriate question number. -receive and process new substances that arrive in vesicles from ER

Invitation to Biology

Molecules of Life

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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