Question 1

____ are cellular structures that act like propellers to move a cell through fluid environments.

Accepted Answer

A)  Pilli
B)  Microvilli
C)  Cilia
D)  Flagella
E)  Microfilaments

Question 2

Which cell feature is absent in bacterial cells?

Accepted Answer

A)  ribosomes
B)  cytoplasm
C)  nucleoid
D)  nucleus
E)  DNA

Question 3

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 4

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 jelly-like 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.

Question 5

Match the following cytoskeletal filaments and their associated motor proteins with the appropriate description.
-made of the protein tubulin and serve as dynamic scaffolding for the cell

Accepted Answer

A)  microfilaments
B)  microtubules
C)  dynein
D)  intermediate filaments
E)  myosin

Question 6

To visualize the structure of DNA,which has a width of 10 nm,which microscope would be best?

Accepted Answer

A)  fluorescence microscope
B)  light microscope
C)  staining microscope
D)  polarized microscope
E)  electron microscope

Question 7

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 → head

Question 8

Match each cell structure represented with the appropriate description.
-"false feet" characterized by elongating microtubules

Accepted Answer

A)  peroxisomes
B)  chloroplasts
C)  Golgi bodies
D)  DNA molecules
E)  cuticleF) central vacuolesG) lysosomesH) mitochondriaI) pseudopodsJ) ribosomes

Question 9

In which cell would you most likely find microtubules?

Accepted Answer

A)  leaf cells of cut flowers displayed in a vase
B)  any cell from a deceased animal
C)  neuronal cells that have completed their growth and migration during development
D)  rapidly dividing tumor cells
E)  muscle cells, which do not typically divide

Question 10

Match each cell structure represented with the appropriate description.
-genetic material

Accepted Answer

A)  peroxisomes
B)  chloroplasts
C)  Golgi bodies
D)  DNA molecules
E)  cuticleF) central vacuolesG) lysosomesH) mitochondriaI) pseudopodsJ) ribosomes

Question 11

Eukaryotic cells have their DNA enclosed in the _____.

Accepted Answer

A)  plasma membrane
B)  nucleus
C)  nucleoid
D)  nuclear envelope
E)  nucleotide

Question 12

The following are organelles found in animal cells.Match the organelle with the appropriate description.An answer may be used more than once.
-This organelle is studded with ribosomes.

Accepted Answer

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

Question 13

The plasma membrane is composed mostly of ____.

Accepted Answer

A)  phospholipids
B)  cholesterol
C)  triglycerides
D)  steroids
E)  sphingolipids

Question 14

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 15

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 16

The size of a cell is limited by the ____.

Accepted Answer

A)  lack of building materials
B)  size of the organism
C)  relationship between the volume of the cell and its surface area
D)  job it does
E)  materials it has to exchange

Question 17

Hydrophobic interactions of phospholipid tails make the ____ conformation of cell membranes possible.

Accepted Answer

A)  lipid bilayer
B)  single layer
C)  rigid
D)  cytoskeletal
E)  nonpolar

Question 18

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 19

Match each cell structure represented with the appropriate description.
-contain enzymes for intracellular digestion

Accepted Answer

A)  peroxisomes
B)  chloroplasts
C)  Golgi bodies
D)  DNA molecules
E)  cuticleF) central vacuolesG) lysosomesH) mitochondriaI) pseudopodsJ) ribosomes

Question 20

Cell shape is reinforced by ____.

Accepted Answer

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

Exam 3: Cell Structure

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

Correct AnswerverifiedShow Answer

Match each cell structure represented with the appropriate description. -genetic material

Correct AnswerverifiedShow Answer

Which cell feature is absent in bacterial cells?

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

Correct AnswerverifiedShow Answer

The plasma membrane is composed mostly of ____.

Correct AnswerverifiedShow Answer

Eukaryotic cells have their DNA enclosed in the _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Match each cell structure represented with the appropriate description. -contain enzymes for intracellular digestion

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____ are cellular structures that act like propellers to move a cell through fluid environments.

Correct AnswerverifiedShow Answer

To visualize the structure of DNA,which has a width of 10 nm,which microscope would be best?

Correct AnswerverifiedShow Answer

In which cell would you most likely find microtubules?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Match the following cytoskeletal filaments and their associated motor proteins with the appropriate description. -made of the protein tubulin and serve as dynamic scaffolding for the cell

Correct AnswerverifiedShow Answer

The plasma membrane _____.

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The size of a cell is limited by the ____.

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Match each cell structure represented with the appropriate description. -"false feet" characterized by elongating microtubules

Correct AnswerverifiedShow Answer

Hydrophobic interactions of phospholipid tails make the ____ conformation of cell membranes possible.

Correct AnswerverifiedShow Answer

The following are organelles found in animal cells.Match the organelle with the appropriate description.An answer may be used more than once. -This organelle is studded with ribosomes.

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Cell shape is reinforced by ____.

Correct AnswerverifiedShow Answer

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