Question 1

A manufacturing company dumps its wastes into a nearby pond.One of the wastes is found to paralyze the contractile vacuoles of certain protists.A biologist looking at individual samples of these organisms taken from the pond would find that they

Accepted Answer

A)  have gained water and burst.
B)  have lost water and shrunk.
C)  have died because wastes have built up in the cytoplasm.
D)  have died of malnutrition.

Question 2

The of a mitochondrion is/are an adaptation that increases the surface area and enhances a mitochondrion's ability to produce ATP.

Accepted Answer

A)  intermembrane space
B)  matrix
C)  stroma
D)  cristae

Question 3

A child dies following a series of chronic bacterial infections.At the autopsy,the physicians are startled to see that the child's white blood cells are loaded with vacuoles containing intact bacteria.Which of the following explanations could account for this finding?

Accepted Answer

A)  A defect in the lysosomes of the white blood cells prevented the cells from destroying engulfed bacteria.
B)  A defect in the rough endoplasmic reticulum prevented the synthesis of the antibodies (defensive proteins) that would have inactivated the bacteria.
C)  A defect in the cell walls of the white blood cells permitted bacteria to enter the cells.
D)  A defect in the Golgi apparatus prevented the cells from processing and excreting the bacteria.

Question 4

Your throat is dry,and you want the last cough drop in the box to last a long time in your mouth.What should you do?

Accepted Answer

A)  It doesn't matter if the cough drop is in one piece or many pieces; the total amount of cough drop is all that matters.
B)  Keep the cough drop whole.This maintains the largest surface- to- volume ratio,and slows the dissolution of the cough drop.
C)  Break the cough drop into little pieces and put them all in your mouth.Since each little piece must be dissolved separately,the drop will last longer.
D)  Break the cough drop into little pieces and put them all in your mouth.This decreases the surface- to- volume ratio,and slows the dissolution of the cough drop.

Question 5

The complex of proteins and DNA in a nondividing cell is called

Accepted Answer

A)  a lysosome.
B)  a ribosome.
C)  chromatin.
D)  a nucleolus.

Question 6

A bacterial cell's DNA is found in its

Accepted Answer

A)  capsule.
B)  ribosomes.
C)  nucleus.
D)  nucleoid region.

Question 7

Tay- Sachs disease

Accepted Answer

A)  prevents the breakdown of glycogen.
B)  causes an accumulation of lipids in brain cells.
C)  involves damage to liver cells.
D)  is due to the absence of an enzyme that digests polysaccharides.

Question 8

Light microscopes

Accepted Answer

A)  are generally not used to view bacteria.
B)  use light and glass lenses to magnify an image.
C)  typically provide more resolution than an electron microscope.
D)  work by reflecting electrons off the surface of an object being studied.

Question 9

Tay- Sachs disease results from the malfunction of

Accepted Answer

A)  nucleoli.
B)  mitochondria.
C)  lysosomes.
D)  endoplasmic reticulum.

Question 10

Which location in the cell is unlikely to contain ribosomes or ribosomal subunits?

Accepted Answer

A)  nuclear envelope
B)  cytoplasm
C)  plasma membrane
D)  endoplasmic reticulum

Question 11

Which of the following statements about lysosomes is false?

Accepted Answer

A)  Lysosomes help to digest worn- out or damaged organelles.
B)  Lysosomes fuse with food vacuoles to expose nutrients to lysosomal enzymes.
C)  Lysosomes destroy harmful bacteria engulfed by white blood cells.
D)  Lysosomes synthesize proteins from the recycled amino acids.

Question 12

Most animal cells are

Accepted Answer

A)  attached to each other via plasmodesmata.
B)  embedded in a lipid matrix.
C)  embedded in an extracellular matrix.
D)  surrounded by a cell wall.

Question 13

Decreased fertility in men from developed countries may be related to

Accepted Answer

A)  decreased metabolic levels from overexposure to UV rays.
B)  increased sperm motility from multiple flagella.
C)  increased exposure to hormone- like chemicals in the environment.
D)  decreased flagella motion due to inactivity.

Question 14

Intermediate filaments

Accepted Answer

A)  guide the movements of organelles.
B)  support the inner mitochondrial membrane.
C)  guide the movements of chromosomes.
D)  surround the nucleus.

Question 15

Which of the following statements regarding cells is false?

Accepted Answer

A)  All cells can interconvert forms of energy.
B)  All cells have a cell wall.
C)  All cells have DNA as their genetic material.
D)  All cells are enclosed in a membrane that maintains internal conditions different from the surroundings.

Question 16

Which of the following statements regarding the Golgi apparatus is false?

Accepted Answer

A)  The Golgi apparatus decreases in size when a cell increases its protein production.
B)  The Golgi apparatus works closely with the endoplasmic reticulum.
C)  The Golgi apparatus modifies chemicals received from the endoplasmic reticulum.
D)  The Golgi apparatus serves as a molecular warehouse and finishing factory.

Question 17

Which of the following would be most affected by a mutation that prevented cells from forming tight junctions?

Accepted Answer

A)  attachment of cells to the surrounding matrix
B)  integrity of the inner lining of the digestive tract
C)  attachment of the cytoskeleton to the inside of the plasma membrane
D)  direct flow of water and small molecules from one cell to another

Question 18

The endosymbiosis hypothesis is supported by all of the following pieces of evidence,except the fact that

Accepted Answer

A)  chloroplasts reproduce through a splitting process like certain prokaryotes.
B)  mitochondria use ATP like prokaryotes.
C)  chloroplasts have ribosomes like prokaryotes.
D)  mitochondria have circular DNA like prokaryotes.

Exam 4: A Tour of the Cell

Light microscopes

Correct Answer
verified

Which of the following statements about lysosomes is false?

Correct Answer
verified

Intermediate filaments

Correct Answer
verified

A manufacturing company dumps its wastes into a nearby pond.One of the wastes is found to paralyze the contractile vacuoles of certain protists.A biologist looking at individual samples of these organisms taken from the pond would find that they

Correct Answer
verified

The endosymbiosis hypothesis is supported by all of the following pieces of evidence,except the fact that

Correct Answer
verified

A bacterial cell's DNA is found in its

Correct Answer
verified

The of a mitochondrion is/are an adaptation that increases the surface area and enhances a mitochondrion's ability to produce ATP.

Correct Answer
verified

Most animal cells are

Correct Answer
verified

The complex of proteins and DNA in a nondividing cell is called

Correct Answer
verified

A child dies following a series of chronic bacterial infections.At the autopsy,the physicians are startled to see that the child's white blood cells are loaded with vacuoles containing intact bacteria.Which of the following explanations could account for this finding?

Correct Answer
verified

Your throat is dry,and you want the last cough drop in the box to last a long time in your mouth.What should you do?

Correct Answer
verified

Tay- Sachs disease results from the malfunction of

Correct Answer
verified

Decreased fertility in men from developed countries may be related to

Correct Answer
verified

Tay- Sachs disease

Correct Answer
verified

Which of the following would be most affected by a mutation that prevented cells from forming tight junctions?

Correct Answer
verified

Which of the following statements regarding the Golgi apparatus is false?

Correct Answer
verified

Which of the following statements regarding cells is false?

Correct Answer
verified

Which location in the cell is unlikely to contain ribosomes or ribosomal subunits?

Correct Answer
verified

Exam 4: A Tour of the Cell

Light microscopes

Correct AnswerverifiedShow Answer

Which of the following statements about lysosomes is false?

Correct AnswerverifiedShow Answer

Intermediate filaments

Correct AnswerverifiedShow Answer

A manufacturing company dumps its wastes into a nearby pond.One of the wastes is found to paralyze the contractile vacuoles of certain protists.A biologist looking at individual samples of these organisms taken from the pond would find that they

Correct AnswerverifiedShow Answer

The endosymbiosis hypothesis is supported by all of the following pieces of evidence,except the fact that

Correct AnswerverifiedShow Answer

A bacterial cell's DNA is found in its

Correct AnswerverifiedShow Answer

The of a mitochondrion is/are an adaptation that increases the surface area and enhances a mitochondrion's ability to produce ATP.

Correct AnswerverifiedShow Answer

Most animal cells are

Correct AnswerverifiedShow Answer

The complex of proteins and DNA in a nondividing cell is called

Correct AnswerverifiedShow Answer

A child dies following a series of chronic bacterial infections.At the autopsy,the physicians are startled to see that the child's white blood cells are loaded with vacuoles containing intact bacteria.Which of the following explanations could account for this finding?

Correct AnswerverifiedShow Answer

Your throat is dry,and you want the last cough drop in the box to last a long time in your mouth.What should you do?

Correct AnswerverifiedShow Answer

Tay- Sachs disease results from the malfunction of

Correct AnswerverifiedShow Answer

Decreased fertility in men from developed countries may be related to

Correct AnswerverifiedShow Answer

Tay- Sachs disease

Correct AnswerverifiedShow Answer

Which of the following would be most affected by a mutation that prevented cells from forming tight junctions?

Correct AnswerverifiedShow Answer

Which of the following statements regarding the Golgi apparatus is false?

Correct AnswerverifiedShow Answer

Which of the following statements regarding cells is false?

Correct AnswerverifiedShow Answer

Which location in the cell is unlikely to contain ribosomes or ribosomal subunits?

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified