Question 1

According to cell theory, ____.

Accepted Answer

A)   all organisms are multicellular
B)   all cells come from preexisting cells
C)   DNA is the structural and functional unit of life
D)   all cells are approximately the same size
E)   proteins are the genetic material of cells

Question 2

The double membrane of mitochondria contains the ATP-making machinery; therefore, this is where ____ would be found.

Accepted Answer

A)   proteins and enzymes required for aerobic respiration
B)   DNA
C)   ribosomes
D)   plasmids
E)   vesicles

Question 3

Plasmids are ____.

Accepted Answer

A)   circular RNA elements
B)   linear DNA elements
C)   circular DNA found in the nucleus
D)   circular DNA found in the cytoplasm
E)   linear RNA elements

Question 4

Which organelle is enclosed by a double membrane?

Accepted Answer

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

Question 5

Plasmodesmata are most similar to ____.

Accepted Answer

A)   gap junctions in animal cells
B)   tight junctions in bacteria
C)   basement membranes in animal cells
D)   adhering junctions in heart muscle
E)   both tight junctions in bacteria and adhering junctions in heart muscle

Question 6

Which organelle primarily functions in packaging cellular secretions for export from the cell?

Accepted Answer

A)   Golgi body
B)   mitochondria
C)   lysosome
D)   ribosome
E)   endoplasmic reticulum

Question 7

Which hairlike cellular projections line the respiratory tract and sweep inhaled particles away from the lungs?

Accepted Answer

A)   flagella
B)   cilia
C)   intermediate filaments
D)   pseudopods
E)   microvilli

Question 8

Transport proteins _____.

Accepted Answer

A)   are found only in eukaryotic cells
B)   allow only small molecules and ions to cross the membrane
C)   are required for small nonpolar molecules to cross the membrane
D)   allow ions and polar molecules to cross the membrane
E)   are peripheral membrane proteins

Question 9

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 10

Most of the active functions of plasma membranes are carried out by ____.

Accepted Answer

A)   cholesterol
B)   proteins
C)   hydrophilic heads
D)   hydrophobic tails
E)   carbohydrates

Question 11

Although some bacteria have membranes around their DNA, we do not call these structures nuclei because they lack ____.

Accepted Answer

A)   pores
B)   proteins
C)   phospholipids
D)   a bilayer construction
E)   ribosomes

Question 12

The relative impermeability of membranes to water-soluble molecules is a result of the ____.

Accepted Answer

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

Question 13

The endomembrane system is composed of ____.

Accepted Answer

A)   microtubules, microfilaments, and intermediate filaments
B)   endoplasmic reticulum, Golgi apparatus, and peroxisomes
C)   vesicles, peroxisomes, and chloroplasts
D)   mitochondria, Golgi apparatus, and ribosomes
E)   plasma membrane, nuclear envelope, and thylakoid membranes

Question 14

Which organelle completes protein modifications and packages the protein for export?

Accepted Answer

A)   lysosome
B)   Golgi body
C)   peroxisome
D)   smooth ER
E)   rough ER B

Question 15

Which two cellular components are enclosed by a membrane?

Accepted Answer

A)   ribosomes and peroxisomes
B)   microtubules and cytosol
C)   Golgi apparatus and peroxisomes
D)   chloroplasts and microtubules
E)   endoplasmic reticulum and ribosomes

Question 16

Match between columns
                        Premises: The cellular digestion and disposal of biological molecules occurs inside this organelle.
This organelle contains enzymes to break down bacteria that may enter the cell.
This organelle translates RNA into protein.
The packaging of secretory proteins occurs in association with this structure.
Aerobic respiration occurs in this organelle.
This organelle stores the cell's genetic material.
This organelle is studded with ribosomes.
This organelle replicates independently of the cell and likely evolved from bacteria.
This organelle is involved in lipid synthesis.

Accepted Answer

The Answer of rough endoplasmic reticulum and mitochondrion and Golgi is...

Question 17

Which cell feature is absent in bacterial cells?

Accepted Answer

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

Question 18

A water-soluble hormone (signaling molecule)  would most likely bind to which membrane protein?

Accepted Answer

A)   active transporter
B)   recognition
C)   receptor
D)   passive transporter
E)   regulator

Question 19

An example of a biofilm is ____.

Accepted Answer

A)   oral bacteria living on teeth
B)   a bacterial capsule
C)   elongated pili
D)   an oil slick
E)   microalgae on a pond surface A

Question 20

In which part of a chloroplast does photosynthesis occur?

Accepted Answer

A)   stroma
B)   outermost membrane
C)   innermost membrane
D)   between the two outer membranes
E)   ribosomes C

Exam 3: Cell Structure

According to cell theory, ____.

Correct Answer
verified

The double membrane of mitochondria contains the ATP-making machinery; therefore, this is where ____ would be found.

Correct Answer
verified

Plasmids are ____.

Correct Answer
verified

Which organelle is enclosed by a double membrane?

Correct Answer
verified

Plasmodesmata are most similar to ____.

Correct Answer
verified

Which organelle primarily functions in packaging cellular secretions for export from the cell?

Correct Answer
verified

Which hairlike cellular projections line the respiratory tract and sweep inhaled particles away from the lungs?

Correct Answer
verified

Transport proteins _____.

Correct Answer
verified

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

Correct Answer
verified

Most of the active functions of plasma membranes are carried out by ____.

Correct Answer
verified

Although some bacteria have membranes around their DNA, we do not call these structures nuclei because they lack ____.

Correct Answer
verified

The relative impermeability of membranes to water-soluble molecules is a result of the ____.

Correct Answer
verified

The endomembrane system is composed of ____.

Correct Answer
verified

Which organelle completes protein modifications and packages the protein for export?

Correct Answer
verified
B

Which two cellular components are enclosed by a membrane?

Correct Answer
verified

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

Which cell feature is absent in bacterial cells?

Correct Answer
verified

A water-soluble hormone (signaling molecule) would most likely bind to which membrane protein?

Correct Answer
verified

An example of a biofilm is ____.

Correct Answer
verified
A

In which part of a chloroplast does photosynthesis occur?

Correct Answer
verified
C

Exam 3: Cell Structure

According to cell theory, ____.

Correct AnswerverifiedShow Answer

The double membrane of mitochondria contains the ATP-making machinery; therefore, this is where ____ would be found.

Correct AnswerverifiedShow Answer

Plasmids are ____.

Correct AnswerverifiedShow Answer

Which organelle is enclosed by a double membrane?

Correct AnswerverifiedShow Answer

Plasmodesmata are most similar to ____.

Correct AnswerverifiedShow Answer

Which organelle primarily functions in packaging cellular secretions for export from the cell?

Correct AnswerverifiedShow Answer

Which hairlike cellular projections line the respiratory tract and sweep inhaled particles away from the lungs?

Correct AnswerverifiedShow Answer

Transport proteins _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Most of the active functions of plasma membranes are carried out by ____.

Correct AnswerverifiedShow Answer

Although some bacteria have membranes around their DNA, we do not call these structures nuclei because they lack ____.

Correct AnswerverifiedShow Answer

The relative impermeability of membranes to water-soluble molecules is a result of the ____.

Correct AnswerverifiedShow Answer

The endomembrane system is composed of ____.

Correct AnswerverifiedShow Answer

Which organelle completes protein modifications and packages the protein for export?

Correct AnswerverifiedB

Which two cellular components are enclosed by a membrane?

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.

Which cell feature is absent in bacterial cells?

Correct AnswerverifiedShow Answer

A water-soluble hormone (signaling molecule) would most likely bind to which membrane protein?

Correct AnswerverifiedShow Answer

An example of a biofilm is ____.

Correct AnswerverifiedA

In which part of a chloroplast does photosynthesis occur?

Correct AnswerverifiedC

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B

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A

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C