Prokaryote Cell Structures

Concept: Prokaryotic Cell Structures 1

10m

Concept: Prokaryotic Cell Structures 2

6m

Concept: Prokaryotic Cell Structures 3

9m

Prokaryote Cell Structures Additional Practice Problems

What are the primary differences between prokaryotic and eukaryotic cells?

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What are the three shapes used to classify bacterial cells?

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The diagram above represents a typical rod-shaped bacterium. Which of the following best describes this cell?

A. It is a prokaryote because it does not have a membrane surrounding its genetic material.

B. It is a prokaryote because it is capable of making or providing itself with ATP.

C. It is a eukaryote because it contains ribosomes.

D. It is a eukaryote because it is surrounded by a cell wall.

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How does cyanobacterial ultrastructure compare to bacterial ultrastructure in general? 

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1. How do the cyanobacteria compare in size to bacteria? 


2.How do the cyanobacteria compare in terms of their shape to bacteria? 

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Which of the following statements regarding bacteria is incorrect?

A. Bacteria do not show extensive internal compartmentalisation.

B. Bacteria typically possess a circular chromosome.

C. Plasmids are circular extra-chromosomal DNA structures that often encode antibiotic resistance functions.

D. Antibiotics always target the bacterial cell wall.

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Compare and contrast Archaea and Bacteria.

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Compare and contrast prokaryotic and eukaryotic cells.

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Prokaryotes can escape detection by our immune system if they have a _____.

a. capsule and/or slime layer

b. plasma membrane

c. cell wall

d. nucleus

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Endospores _____.

a. are a means of reproduction

b. can survive for hundreds of years

c. cannot be killed

d. All of these

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Antibiotics _____.

a. selectively kill bacteria

b. should be used whenever someone feels sick

c. only kill off the disease causing bacteria

d. All of these

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Which of the following is a problem associated with antibiotic therapy?

a. Misuse of antibiotics increases the number of antibiotic-resistant strains.

b. People can die if given an antibiotic to which they are allergic.

c. The use of antibiotics can prevent natural immunity from occurring.

d. All of these

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Which of the following is not characteristic of a prokaryote?

a. Cell wall

b. DNA

c. Nucleus

d. Plasma membrane

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The first cells might have been _____.

a. eukaryotic

b. photosynthetic

c. heterotrophic

d. All of these

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A reason that some antibiotics harm bacteria but not humans is because the antibiotic inhibits bacterial enzymes that humans do not have. 

a. True

b. False

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A reason that some antibiotics harm bacteria but not humans is because humans have many more cells than bacteria. 

a. True

b. False

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Penicillin halts bacterial infections: 

a. By stimulating a person's immune system

b. By damaging the cell membrane

c. By interfering with the construction of the cell wall

d. By causing the DNA of a bacterium to mutate

e. All are correct

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The cell wall of bacteria: 

a. Helps prevent the cell from bursting

b. Protects the cell

c. All are correct

d. Contains peptidoglycan

e. Gives the bacterium a distinctive shape

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A very common method of distinguishing the bacteria takes advantage of the thickness of the peptidoglycan layer in the cell wall. This method of differential staining of cells is called

a.  positive staining

b.  negative staining

c.  Gram staining

d.  neutral staining

e.   prokaryotic staining

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The peptidoglycan of the bacterial cell wall contains a carbohydrate matrix linked together by short chains of

a. amino acids

b. fatty acids

c. nucleotides

d. water molecules

e. steroids

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