Question 1

Because the smooth ER does not contain ____, it cannot produce proteins.

Accepted Answer

A)   Golgi bodies
B)   mitochondria
C)   ribosomes
D)   DNA
E)   lysosomes

Question 2

Due to the molecular interactions between lipids and polar molecules, _____.

Accepted Answer

A)   water molecules isolate themselves into droplets when mixed with lipids
B)   lipids readily dissolve in water
C)   nonpolar lipids will not interact with water
D)   polar substances pass through a lipid bilayer more readily than nonpolar substances
E)   polar molecules embed in the hydrophobic interior of the phospholipid bilayer

Question 3

A protein is synthesized on a ribosome within the rough endoplasmic reticulum. If the protein needs to be modified and packaged before export from the cell, to which structure is it sent?

Accepted Answer

A)   endosome
B)   lysosome
C)   Golgi body
D)   nucleus
E)   smooth endoplasmic reticulum

Question 4

The enzyme catalase functions in the breakdown of hydrogen peroxide, a toxic by-product of fatty acid digestion. In which cellular organelle is catalase found?

Accepted Answer

A)   Golgi body
B)   peroxisome
C)   lysosome
D)   ribosome
E)   mitochondrion

Question 5

The plasma membrane _____.

Accepted Answer

A)   controls the contents of the cell
B)   is composed mostly of cholesterol
C)   is permeable to ions and polar molecules
D)   is free of proteins
E)   is rigid and impermeable

Question 6

Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?

Accepted Answer

A)   gap junctions
B)   tight junctions
C)   plasmodesmata
D)   adhering junctions
E)   desmosomes

Question 7

Archaea were given their own separate domain because they are ____.

Accepted Answer

A)   considered a type of bacteria
B)   most closely related to eukaryotes
C)   multicellular
D)   nucleated
E)   not prokaryotic

Question 8

Peptic ulcers are caused by damage to the wall of the stomach by the acids that help digest food. This can be caused by the failure of ____.

Accepted Answer

A)   tight junctions
B)   adhering junctions
C)   gap junctions
D)   plasmodesmata
E)   adhering and gap junctions

Question 9

How do archaeal and eukaryotic cell membranes differ?

Accepted Answer

A)   Archaeal membrane phospholipids form covalent bonds with one another, but eukaryotic membrane phospholipids do not.
B)   Eukaryotic membrane phospholipids are not composed of fatty acids, but archaeal membrane phospholipids are.
C)   Archaeal phospholipids move freely throughout the bilayer, but eukaryotic membrane phospholipids are stationary.
D)   Archaeal, but not eukaryotic, membranes are described by the fluid mosaic model.
E)   Eukaryotic membranes are less fluid than archaeal membranes.

Question 10

Which organisms are the most diverse forms of life?

Accepted Answer

A)   protists
B)   fungi
C)   animals
D)   bacteria and archaea
E)   plants

Question 11

Why are adhering junctions common in tissues subject to constant abrasion or stretching, such as skin?

Accepted Answer

A)   These cells need to communicate by allowing cytoplasm to flow between adjacent cells.
B)   The cells in these tissues require strong cell-to-cell junctions to hold them together.
C)   Adhering junctions prevent harsh enzymes from flowing between adjacent cells.
D)   These tissues do not have basement membranes.
E)   Adhering junctions allow production of a protective cuticle.

Question 12

The development of the nervous system requires the migration and lengthening of neuronal cells. These events are driven by ____.

Accepted Answer

A)   pseudopods
B)   motor proteins
C)   flagella
D)   intermediate filaments
E)   microfilaments

Question 13

The presence of circular DNA in mitochondria and chloroplasts suggests that these organelles evolved from ____.

Accepted Answer

A)   bacteria
B)   nuclei
C)   single-celled eukaryotes
D)   anaerobic microorganisms
E)   archaea

Question 14

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

Exam 3: Cell Structure

Peptic ulcers are caused by damage to the wall of the stomach by the acids that help digest food. This can be caused by the failure of ____.

Correct Answer
verified

The plasma membrane _____.

Correct Answer
verified

Because the smooth ER does not contain ____, it cannot produce proteins.

Correct Answer
verified

The enzyme catalase functions in the breakdown of hydrogen peroxide, a toxic by-product of fatty acid digestion. In which cellular organelle is catalase found?

Correct Answer
verified

Archaea were given their own separate domain because they are ____.

Correct Answer
verified

The development of the nervous system requires the migration and lengthening of neuronal cells. These events are driven by ____.

Correct Answer
verified

Due to the molecular interactions between lipids and polar molecules, _____.

Correct Answer
verified

How do archaeal and eukaryotic cell membranes differ?

Correct Answer
verified

Which organisms are the most diverse forms of life?

Correct Answer
verified

A protein is synthesized on a ribosome within the rough endoplasmic reticulum. If the protein needs to be modified and packaged before export from the cell, to which structure is it sent?

Correct Answer
verified

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

Correct Answer
verified

Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?

Correct Answer
verified

Why are adhering junctions common in tissues subject to constant abrasion or stretching, such as skin?

Correct Answer
verified

The presence of circular DNA in mitochondria and chloroplasts suggests that these organelles evolved from ____.

Correct Answer
verified

Exam 3: Cell Structure

Peptic ulcers are caused by damage to the wall of the stomach by the acids that help digest food. This can be caused by the failure of ____.

Correct AnswerverifiedShow Answer

The plasma membrane _____.

Correct AnswerverifiedShow Answer

Because the smooth ER does not contain ____, it cannot produce proteins.

Correct AnswerverifiedShow Answer

The enzyme catalase functions in the breakdown of hydrogen peroxide, a toxic by-product of fatty acid digestion. In which cellular organelle is catalase found?

Correct AnswerverifiedShow Answer

Archaea were given their own separate domain because they are ____.

Correct AnswerverifiedShow Answer

The development of the nervous system requires the migration and lengthening of neuronal cells. These events are driven by ____.

Correct AnswerverifiedShow Answer

Due to the molecular interactions between lipids and polar molecules, _____.

Correct AnswerverifiedShow Answer

How do archaeal and eukaryotic cell membranes differ?

Correct AnswerverifiedShow Answer

Which organisms are the most diverse forms of life?

Correct AnswerverifiedShow Answer

A protein is synthesized on a ribosome within the rough endoplasmic reticulum. If the protein needs to be modified and packaged before export from the cell, to which structure is it sent?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?

Correct AnswerverifiedShow Answer

Why are adhering junctions common in tissues subject to constant abrasion or stretching, such as skin?

Correct AnswerverifiedShow Answer

The presence of circular DNA in mitochondria and chloroplasts suggests that these organelles evolved from ____.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified