Question 1

Your muscle cells need large amounts of ATP to function in the movement of your body. Which of the following organelles would you expect to be especially abundant in muscle cells?

Accepted Answer

A)  mitochondria 
B)  ribosomes 
C)  smooth endoplasmic reticulum 
D)  lysosomes

Question 2

A screen door allows breezes to get in and aromas to get out but keeps out insects. Its function most resembles

Accepted Answer

A)  the cytosol. 
B)  the plasma membrane. 
C)  the ER lumen. 
D)  a ribosome.

Question 3

The figure below shows a mitochondrion, emphasizing its inner and outer membranes. 
The inner membrane of the mitochondria is thought to have evolved from

Accepted Answer

A)  a bit of plasma membrane from the early eukaryotic cell that engulfed a bacterium. 
B)  the membrane surrounding the lysosome that engulfed a bacterium once it was inside an early eukaryotic cell. 
C)  the plasma membrane of a prokaryotic cell engulfed by an early eukaryotic cell. 
D)  infoldings of the plasma membrane of an early eukaryotic cell.

Question 4

Which of the following statements is false?

Accepted Answer

A)  Actin filaments can change rapidly in length. 
B)  Actin filaments define the paths for vesicle movement within the cell. 
C)  Actin filaments allow cells to change shape. 
D)  Actin filaments allow cells to move.

Question 5

Which of the following statements is true?

Accepted Answer

A)  All types of eukaryotic cells have the same structure, appearance, and function. 
B)  Different eukaryotic cells contain different numbers and types of organelles depending on the specific tasks they must perform. 
C)  Bacterial cells contain membrane-bound organelles. 
D)  Plant and animal cells have the same structure and organelles.

Question 6

The part of the plasma membrane that is in contact with the external environment of the cell consists of

Accepted Answer

A)  hydrophobic portions of the constituent molecules. 
B)  hydrophilic portions of the constituent molecules. 
C)  neutral (uncharged) molecules. 
D)  nonpolar ends of the constituent molecules.

Question 7

The magnification of a specimen by a light microscope is a result of

Accepted Answer

A)  the bending of light as it passes through glass lenses. 
B)  the focusing of electron beams by magnets. 
C)  the reflection of light off a specimen. 
D)  using chemicals to physically enlarge cells.

Question 8

Certain cells found in humans are identical to certain cells found in plants.

Accepted Answer

A) True 
 B)False

Question 9

The sizes of several biological structures are indicated in the figure below. 
Which of the following is the smallest structure you could see with a light microscope?

Accepted Answer

A)  viruses 
B)  frog egg 
C)  most bacteria 
D)  ribosomes

Question 10

_____ _____ are the part of the cytoskeleton that provide mechanical strength to cells and reinforce the membranes of organelles.

Accepted Answer

The answer of _____ _____ are the part of the...

Question 11

The _________ has a double membrane but no cristae.

Accepted Answer

The answer of The _________ has a double membrane but...

Question 12

Which of the following statements is false?

Accepted Answer

A)  The plasma membrane prevents some molecules from entering the cell. 
B)  The plasma membrane prevents some molecules from leaving the cell. 
C)  The plasma membrane receives signals from the outside environment. 
D)  The plasma membrane is the storehouse for each cell's genetic information.

Question 13

The process of photosynthesis

Accepted Answer

A)  breaks down sugars to create ATP. 
B)  traps light energy in an energy carrier like ATP. 
C)  produces carbon dioxide. 
D)  occurs in some animal cells.

Question 14

Membrane-enclosed structures in eukaryotic cells are called __________.

Accepted Answer

The answer of Membrane-enclosed structures in eukaryotic cells are called...

Question 15

The internal pH of a lysosome is about 5-quite a bit lower than the cytoplasm of the cell in which the lysosome resides. What is one advantage to not having the lysosome's enzymes function best at the cytoplasm's pH of 7?

Accepted Answer

The answer of The internal pH of a lysosome is...

Question 16

The contents of cells are often visualized with fluorescent (glow-in-the-dark) stains. You treat a cell with a stain that makes a certain part of the cytoskeleton glow green and another stain that makes mitochondria glow red. Under the microscope you see a meshwork of green filaments throughout the cell. Red organelles appear to be traveling along the filaments. The green stain you used must stain

Accepted Answer

A)  microtubules. 
B)  microfilaments. 
C)  intermediate filaments. 
D)  motor proteins.

Exam 5: Cell Structure and Internal Compartments

Your muscle cells need large amounts of ATP to function in the movement of your body. Which of the following organelles would you expect to be especially abundant in muscle cells?

A screen door allows breezes to get in and aromas to get out but keeps out insects. Its function most resembles

The figure below shows a mitochondrion, emphasizing its inner and outer membranes. The inner membrane of the mitochondria is thought to have evolved from

Which of the following statements is false?

Which of the following statements is true?

The part of the plasma membrane that is in contact with the external environment of the cell consists of

The magnification of a specimen by a light microscope is a result of

Certain cells found in humans are identical to certain cells found in plants.

The sizes of several biological structures are indicated in the figure below. Which of the following is the smallest structure you could see with a light microscope?

_ _ are the part of the cytoskeleton that provide mechanical strength to cells and reinforce the membranes of organelles.

The _________ has a double membrane but no cristae.

Which of the following statements is false?

The process of photosynthesis

Membrane-enclosed structures in eukaryotic cells are called __________.

The internal pH of a lysosome is about 5-quite a bit lower than the cytoplasm of the cell in which the lysosome resides. What is one advantage to not having the lysosome's enzymes function best at the cytoplasm's pH of 7?