Question 1

The phospholipids of plasma membranes contain _____.

Accepted Answer

A)   a hydrophobic head and a hydrophilic tail
B)   two hydrophobic heads and a hydrophilic tail
C)   a hydrophobic head and two hydrophobic tails
D)   a hydrophilic head and two hydrophobic tails
E)   a hydrophilic head and two hydrophilic tailsF) C) and E)
G) C) and D)

Question 2

Meat, fruits, and vegetables could be contaminated with E. coli strains toxic to humans when they come in contact with animal ____.
I. feces
II. urine
III. blood

Accepted Answer

A)   I only
B)   I and II
C)   II and III
D)   I and III
E)   I, II, and IIIF) B) and E)
G) A) and B)

Question 3

Which statement describes bacteria?

Accepted Answer

A)   Most bacteria are harmful.
B)   Bacteria only inhabit surfaces.
C)   Bacteria outnumber human cells in our bodies.
D)   Bacteria are restricted in their distribution to certain ecosystems.
E)   Bacteria are the most common organisms in the domain Eukarya.F) A) and E)
G) A) and D)

Question 4

If a microscopic pin was stuck into the center of a bacterium, what would be the order of the structures encountered from the outside in?

Accepted Answer

A)   capsule; cell wall; plasma membrane; cytoplasm
B)   cell wall; capsule; plasma membrane; cytoplasm
C)   plasma membrane; cell wall; capsule; cytoplasm
D)   cell wall; plasma membrane; capsule; cytoplasm
E)   capsule; plasma membrane; cell wall; cytoplasmF) B) and C)
G) C) and D)

Question 5

A molecular analysis of plasma or nuclear membranes would reveal the presence of _____.

Accepted Answer

A)   cellulose and chitin
B)   suberin and cutin
C)   phospholipids and proteins
D)   microtubules and microfilaments
E)   phospholipids and nucleic acidsF) A) and B)
G) B) and C)

Question 6

A hypothetical "microbullet" shot through a phospholipid bilayer will pass the bilayer components in which order?

Accepted Answer

A)   tail → tail → head → head
B)   head → tail → tail → head
C)   head → tail → head → tail
D)   head → head → tail → tail
E)   tail → head → tail → headF) A) and C)
G) C) and E)

Question 7

The ____ is responsible for making the lipids that form the cell's membranes.

Accepted Answer

A)   rough ER
B)   smooth ER
C)   Golgi body
D)   peroxisome
E)   mitochondriaF) A) and D)
G) A) and C)

Question 8

Match between columns
                        Premises: flagellum
capsule
plasma membrane
cytoplasm
cell wall
pilus
DNA

Accepted Answer

The Answer of C and B and G and E is...

Question 9

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

Accepted Answer

A)   lysosome
B)   peroxisome
C)   Golgi body
D)   vacuole
E)   rough ERF) A) and D)
G) A) and E)

Question 10

Match between columns
                        Premises: enzyme filled vesicle that breaks down amino acids, fatty acids, and toxic substances
contain enzymes for intracellular digestion
receive and process proteins that arrive in vesicles from the rough ER
storage of metabolic substances
"false feet" characterized by elongating microtubules
break down organic compounds to form ATP
genetic material
in plants, a secreted extracellular membrane that helps to prevent water loss
assembles amino acid into polypeptide chains
organelles of photosynthesis

Accepted Answer

The Answer of Golgi bodies and peroxisomes and ribosomes and is...

Question 11

The endoplasmic reticulum is an extension of ____.

Accepted Answer

A)   the cytoskeleton
B)   flagella
C)   cilia
D)   the nuclear envelope
E)   the plasma membraneF) A) and B)
G) B) and D)

Question 12

Biofilms found in nature ____.

Accepted Answer

A)   contain only bacteria
B)   are composed of multicellular organisms
C)   are most often found on liquid surfaces
D)   are communities of unicellular organisms
E)   contain only closely related organismsF) A) and C)
G) D) and E)

Question 13

Which organelle is correctly matched with its function?

Accepted Answer

A)   vacuoles: production of ATP from carbohydrates
B)   rough ER: synthesis of plasma membrane proteins
C)   Golgi bodies: synthesis of membrane phospholipids
D)   mitochondria: capture of light for photosynthesis
E)   smooth ER: digestion of invading bacteriaF) B) and E)
G) A) and D)

Question 14

What accounts for the fluidity that defines the fluid mosaic model of a typical plasma membrane?

Accepted Answer

A)   The proteins, being large, cause the membrane to jiggle around.
B)   The phospholipids collectively form a jellylike substance similar to the cytoplasm.
C)   The phospholipids are not bonded to each other and thus are freer 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.F) C) and D)
G) A) and B)

Question 15

Vesicles from the Golgi body that will become lysosomes contain enzymes for ____.

Accepted Answer

A)   aerobic respiration
B)   photosynthesis
C)   breaking down cellular debris
D)   protein synthesis
E)   digesting amino acids and fatty acidsF) A) and D)
G) B) and E)

Question 16

The plasma membrane is composed mostly of ____.

Accepted Answer

A)   phospholipids
B)   cholesterol
C)   triglycerides
D)   steroids
E)   sphingolipidsF) A) and D)
G) B) and C)

Question 17

Ribosomes are ____.

Accepted Answer

A)   membrane-enclosed organelles
B)   attached to the smooth endoplasmic reticulum
C)   involved in polypeptide transport
D)   required for DNA synthesis
E)   involved in polypeptide synthesisF) A) and B)
G) All of the above

Question 18

Since viruses are typically 20-200 nm in diameter, the ____ microscope is best for viewing them.

Accepted Answer

A)   light
B)   electron
C)   fluorescent
D)   polarizing
E)   contrastingF) A) and D)
G) A) and B)

Question 19

Cell shape is reinforced by ____.

Accepted Answer

A)   phospholipids
B)   DNA
C)   cytoskeletal filaments
D)   transport proteins
E)   ribosomesF) B) and D)
G) B) and C)

Question 20

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 tissues
E)   is a sheet of nonfibrous materialF) A) and E)
G) None of the above

Exam 3: Cell Structure

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

Correct Answer
verified

Match each cell structure represented with the appropriate description.

The phospholipids of plasma membranes contain _____.

Correct Answer
verified

Since viruses are typically 20-200 nm in diameter, the ____ microscope is best for viewing them.

Correct Answer
verified

Which organelle is correctly matched with its function?

Correct Answer
verified

A basement membrane ____.

Correct Answer
verified

Examine the following figure. Match each letter of the figure with the appropriate cell structure.

A hypothetical "microbullet" shot through a phospholipid bilayer will pass the bilayer components in which order?

Correct Answer
verified

The plasma membrane is composed mostly of ____.

Correct Answer
verified

Ribosomes are ____.

Correct Answer
verified

Cell shape is reinforced by ____.

Correct Answer
verified

If a microscopic pin was stuck into the center of a bacterium, what would be the order of the structures encountered from the outside in?

Correct Answer
verified

The ____ is responsible for making the lipids that form the cell's membranes.

Correct Answer
verified

What accounts for the fluidity that defines the fluid mosaic model of a typical plasma membrane?

Correct Answer
verified

Biofilms found in nature ____.

Correct Answer
verified

The endoplasmic reticulum is an extension of ____.

Correct Answer
verified

Meat, fruits, and vegetables could be contaminated with E. coli strains toxic to humans when they come in contact with animal ____. I. feces II. urine III. blood

Correct Answer
verified

Vesicles from the Golgi body that will become lysosomes contain enzymes for ____.

Correct Answer
verified

A molecular analysis of plasma or nuclear membranes would reveal the presence of _____.

Correct Answer
verified

Which statement describes bacteria?

Correct Answer
verified

Exam 3: Cell Structure

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

Correct AnswerverifiedShow Answer

Match each cell structure represented with the appropriate description.

The phospholipids of plasma membranes contain _____.

Correct AnswerverifiedShow Answer

Since viruses are typically 20-200 nm in diameter, the ____ microscope is best for viewing them.

Correct AnswerverifiedShow Answer

Which organelle is correctly matched with its function?

Correct AnswerverifiedShow Answer

A basement membrane ____.

Correct AnswerverifiedShow Answer

Examine the following figure. Match each letter of the figure with the appropriate cell structure.

A hypothetical "microbullet" shot through a phospholipid bilayer will pass the bilayer components in which order?

Correct AnswerverifiedShow Answer

The plasma membrane is composed mostly of ____.

Correct AnswerverifiedShow Answer

Ribosomes are ____.

Correct AnswerverifiedShow Answer

Cell shape is reinforced by ____.

Correct AnswerverifiedShow Answer

If a microscopic pin was stuck into the center of a bacterium, what would be the order of the structures encountered from the outside in?

Correct AnswerverifiedShow Answer

The ____ is responsible for making the lipids that form the cell's membranes.

Correct AnswerverifiedShow Answer

What accounts for the fluidity that defines the fluid mosaic model of a typical plasma membrane?

Correct AnswerverifiedShow Answer

Biofilms found in nature ____.

Correct AnswerverifiedShow Answer

The endoplasmic reticulum is an extension of ____.

Correct AnswerverifiedShow Answer

Meat, fruits, and vegetables could be contaminated with E. coli strains toxic to humans when they come in contact with animal ____. I. feces II. urine III. blood

Correct AnswerverifiedShow Answer

Vesicles from the Golgi body that will become lysosomes contain enzymes for ____.

Correct AnswerverifiedShow Answer

A molecular analysis of plasma or nuclear membranes would reveal the presence of _____.

Correct AnswerverifiedShow Answer

Which statement describes bacteria?

Correct AnswerverifiedShow Answer

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