Question 1

Describe the sequence of events in the evolution of eukaryotic cells as described by the endosymbiotic hypothesis. List four pieces of evidence which support this theory.

Accepted Answer

The endosymbiotic theory describes the e...

Question 2

Most helminthic parasites spend at least some part of their life cycle in the

Accepted Answer

A)   skin.
B)   gastrointestinal tract.
C)   genitourinary tract.
D)   cardiovascular system.
E)   respiratory tract.

Question 3

Evidence in support of the endosymbiotic theory includes

Accepted Answer

A)   the presence of 70S ribosomes in mitochondria and chloroplasts and a single membrane enclosing the mitochondria and chloroplasts linear DNA in mitochondria and chloroplasts.
B)   the presence of 70S ribosomes in mitochondria and chloroplasts and a single membrane enclosing the mitochondria and chloroplasts.
C)   linear DNA in mitochondria and chloroplasts.
D)   a single membrane enclosing the mitochondria and chloroplasts.
E)   the presence of 70S ribosomes in mitochondria and chloroplasts.

Question 4

Which persons may be at increased risk for mycoses?

Accepted Answer

A)   those with weakened immune systems
B)   those who have not received the recommended vaccine schedule
C)   those who have had their normal microbiome disrupted by antibiotic therapy
D)   either those with weakened immune systems or those who have had their normal microbiome disrupted by antibiotic therapy
E)   either those with weakened immune systems or those who have not received the recommended vaccine schedule

Question 5

You have isolated a new organism which has eukaryotic cells, is multicellular, grows as hyphae, does not perform photosynthesis, and has a cell wall. This organism most likely belongs to which kingdom?

Accepted Answer

A)   Fungi
B)   Bacteria
C)   Protista
D)   Archaea
E)   either Fungi or Protista

Question 6

Binary fission, mitosis, and meiosis all produce genetically identical daughter cells.

Accepted Answer

A) True 
 B)False  False

Question 7

Which statement is not true about eukaryotic ribosomes?

Accepted Answer

A)   Ribosomes found in mitochondria are 70S rather than the 80S type found in the cytoplasm.
B)   Bound ribosomes are always bound while free ribosomes are always free.
C)   Both bound and free ribosomes consist of a 40S and a 60S subunit.
D)   Bound ribosomes are attached to the endoplasmic reticulum (ER) .
E)   Bound ribosomes produce proteins that are destined for secretion from the cell.

Question 8

The role of the glycocalyx in eukaryotic cells may include

Accepted Answer

A)   tissue development.
B)   tissue development and transport processes.
C)   protection against mechanical and osmotic stress, tissue development, and transport processes.
D)   protection against mechanical and osmotic stress.
E)   transport processes.

Question 9

Which of the following processes is incorrectly matched to its description?

Accepted Answer

A)   Exocytosis: Exports materials into a cell
B)   Pinocytosis: Imports dissolved substance using small vesicles
C)   Phagocytosis: Imports undissolved substances but not whole cells or viruses
D)   Receptor- mediated endocytosis: Uses specific binding between structures on the plasma membrane binding to ligands
E)   Endocytosis: Imports materials into a cell C

Question 10

Fungal infections are called

Accepted Answer

A)   coencytic.
B)   basidium.
C)   sporgangia.
D)   mycoses.
E)   dimorphic.

Question 11

Mitochondria share all the following features with bacteria except

Accepted Answer

A)   linear DNA.
B)   linear DNA and 80S ribosomes.
C)   70S and 80S ribosomes.
D)   80S ribosomes.
E)   70S ribosomes.

Question 12

Which portion of the mitochondria is folded to create a large surface area?

Accepted Answer

A)   outer membrane
B)   inner membrane
C)   intercristal space
D)   matrix
E)   inner and outer membranes

Question 13

Which does not describe eukaryotic flagella?

Accepted Answer

A)   anchored by a basal body connected to a centriole
B)   flagellin protein
C)   9+2 arrangement of microtubules
D)   plasma membrane- enclosed
E)   whip- like motion

Question 14

Protozoan infections are common in (though definitely not limited to) developing countries where limited medical and laboratory facilities may hinder diagnosis. Each of the four groups of protozoans may be identified by certain characteristics visible under the microscope. Name the groups and explain those characteristics which lead to identification.

Accepted Answer

Protozoans are grouped into four categor...

Question 15

Which type of vesicle/vacuole is incorrectly matched with its description?

Accepted Answer

A)   Secretory vesicle: Replenishes the lipid bilayer and deliver proteins for incorporation into the membrane
B)   Peroxisome: Protects the cell from hydrogen peroxide and other toxic oxygen intermediates
C)   Lysosome: Contains hydrolytic enzymes that break down substances engulfed by the cell
D)   Vacuole: Contains water and substances such as nutrients, toxins, or waste products
E)   Transport vesicle: Moves substances to diverse cellular destinations within the cell

Question 16

Which is not a function which the cytoskeleton performs?

Accepted Answer

A)   protection from external forces
B)   transport of vesicles and organelles
C)   passive transport of substances through the plasma membrane
D)   movement of chromosomes during cell division
E)   movement of the cell

Question 17

A chemical compound which specifically disrupts the 9+2 microtubule arrangement would be a potential drug candidate as a(n)

Accepted Answer

A)   herbicide (weed- killer) .
B)   drug targeting fungal pathogens.
C)   contraceptive drug disabling motility of human sperm.
D)   antimicrobial targeting amoeboid protozoans.
E)   antibiotic targeting motile bacteria.

Question 18

The kingdom Protista contains species which have plant- like features, others which contain animal- like features, and still others that contain fungal- like features. This is because scientists do not have a set of standard features by which to group them.

Accepted Answer

A) True 
 B)False

Question 19

You have discovered a compound that inhibits the placement of sterols in the plasma membrane. What can you deduce about the efficacy of this drug?

Accepted Answer

A)   This drug may be broadly effective against both prokaryotic and eukaryotic cells but may be toxic in human patients.
B)   This drug may be broadly effective against eukaryotic cells but may be toxic in human patients.
C)   This drug may be broadly effective against both prokaryotic and eukaryotic cells.
D)   This drug may be broadly effective against prokaryotic cells.
E)   This drug may be broadly effective against eukaryotic cells.

Question 20

Where are cilia found in the human body?

Accepted Answer

A)   large intestine
B)   oral cavity
C)   lining blood vessels
D)   upper respiratory tract
E)   female reproductive system D

Exam 4: Introduction to Eukaryotic Cells

Describe the sequence of events in the evolution of eukaryotic cells as described by the endosymbiotic hypothesis. List four pieces of evidence which support this theory.

Correct Answer
verified
The endosymbiotic theory describes the e...
View Answer

Most helminthic parasites spend at least some part of their life cycle in the

Correct Answer
verified

Evidence in support of the endosymbiotic theory includes

Correct Answer
verified

Which persons may be at increased risk for mycoses?

Correct Answer
verified

You have isolated a new organism which has eukaryotic cells, is multicellular, grows as hyphae, does not perform photosynthesis, and has a cell wall. This organism most likely belongs to which kingdom?

Correct Answer
verified

Binary fission, mitosis, and meiosis all produce genetically identical daughter cells.

Correct Answer
verified
False

Which statement is not true about eukaryotic ribosomes?

Correct Answer
verified

The role of the glycocalyx in eukaryotic cells may include

Correct Answer
verified

Which of the following processes is incorrectly matched to its description?

Correct Answer
verified
C

Fungal infections are called

Correct Answer
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Mitochondria share all the following features with bacteria except

Correct Answer
verified

Which portion of the mitochondria is folded to create a large surface area?

Correct Answer
verified

Which does not describe eukaryotic flagella?

Correct Answer
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Correct Answer
verified
Protozoans are grouped into four categor...
View Answer

Which type of vesicle/vacuole is incorrectly matched with its description?

Correct Answer
verified

Which is not a function which the cytoskeleton performs?

Correct Answer
verified

A chemical compound which specifically disrupts the 9+2 microtubule arrangement would be a potential drug candidate as a(n)

Correct Answer
verified

The kingdom Protista contains species which have plant- like features, others which contain animal- like features, and still others that contain fungal- like features. This is because scientists do not have a set of standard features by which to group them.

Correct Answer
verified

You have discovered a compound that inhibits the placement of sterols in the plasma membrane. What can you deduce about the efficacy of this drug?

Correct Answer
verified

Where are cilia found in the human body?

Correct Answer
verified
D

Exam 4: Introduction to Eukaryotic Cells

Describe the sequence of events in the evolution of eukaryotic cells as described by the endosymbiotic hypothesis. List four pieces of evidence which support this theory.

Correct AnswerverifiedThe endosymbiotic theory describes the e...View AnswerShow Answer

Most helminthic parasites spend at least some part of their life cycle in the

Correct AnswerverifiedShow Answer

Evidence in support of the endosymbiotic theory includes

Correct AnswerverifiedShow Answer

Which persons may be at increased risk for mycoses?

Correct AnswerverifiedShow Answer

You have isolated a new organism which has eukaryotic cells, is multicellular, grows as hyphae, does not perform photosynthesis, and has a cell wall. This organism most likely belongs to which kingdom?

Correct AnswerverifiedShow Answer

Binary fission, mitosis, and meiosis all produce genetically identical daughter cells.

Correct AnswerverifiedFalse

Which statement is not true about eukaryotic ribosomes?

Correct AnswerverifiedShow Answer

The role of the glycocalyx in eukaryotic cells may include

Correct AnswerverifiedShow Answer

Which of the following processes is incorrectly matched to its description?

Correct AnswerverifiedC

Fungal infections are called

Correct AnswerverifiedShow Answer

Mitochondria share all the following features with bacteria except

Correct AnswerverifiedShow Answer

Which portion of the mitochondria is folded to create a large surface area?

Correct AnswerverifiedShow Answer

Which does not describe eukaryotic flagella?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedProtozoans are grouped into four categor...View AnswerShow Answer

Which type of vesicle/vacuole is incorrectly matched with its description?

Correct AnswerverifiedShow Answer

Which is not a function which the cytoskeleton performs?

Correct AnswerverifiedShow Answer

A chemical compound which specifically disrupts the 9+2 microtubule arrangement would be a potential drug candidate as a(n)

Correct AnswerverifiedShow Answer

The kingdom Protista contains species which have plant- like features, others which contain animal- like features, and still others that contain fungal- like features. This is because scientists do not have a set of standard features by which to group them.

Correct AnswerverifiedShow Answer

You have discovered a compound that inhibits the placement of sterols in the plasma membrane. What can you deduce about the efficacy of this drug?

Correct AnswerverifiedShow Answer

Where are cilia found in the human body?

Correct AnswerverifiedD

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verified
The endosymbiotic theory describes the e...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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False

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C

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Protozoans are grouped into four categor...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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D