Lecture 2: Bacterial Structure And Function 1 Flashcards

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1
Q

Are plant and animal cells smaller or larger that bacteria?

A

Larger than bacteria

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2
Q

Are viruses larger or smaller than bacteria?

A

Smaller

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3
Q

Are ribosomes larger or smaller than bacteria?

A

Smaller

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4
Q

About how many bacteria could fit into a mammalian cell?

A

Hundreds

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5
Q

To what is the circular DNA genome of bacteria localized?

A

Nucleiod

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6
Q

Does the bacterial genome have introns?

A

No

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7
Q

What is the bacterial cell wall made of?

A

Peptidoglycan

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8
Q

What is the S unit of bacterial ribosomes?

A

70S

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9
Q

How do bacteria reproduce?

A

Binary Fission

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10
Q

Do all bacteria have an internal plasma membrane?

A

Yes

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11
Q

What differentiates G+ from G-?

A

G+ has thicker, external peptodoglycan cell wall

G- has a second external membrane

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12
Q

What are the steps of Gram Staining?

A
Fix
Crystal Violet
Iodine
Decolorize
Counterstain (Safranin)
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13
Q

What color will G+ cells be?

A

Blue

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14
Q

What color will G- cells be?

A

Pink (Counterstain)

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15
Q

Why can’t acid fast bacteria be gram stained?

A

Mycolic acid layer resists crystal violet and counterstain

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16
Q

What is the LPS of G- bacteria characterized as?

A

Endotoxin

17
Q

What do both LPS of G- bacteria and teichoic acids of G+ bacteria cause?

A

Septic shock

18
Q

What are glycocalices, and what do they allow the formation of?

A

Slime layer for attachent

Allow formation of biofilms

19
Q

What are capsules used for by bacteria?

A

immune evasion, attachment

20
Q

What are capsules used for clinically?

A

tests, vaccines

21
Q

What are pili used for?

A

Attachment

22
Q

What is a common type of pili used for attachment in G- bacteria?

A

Type 1

23
Q

What is a common type of pili used for propulsion in G- bacteria?

A

Type 4

24
Q

What is a common type of pili used for secretion in G- bacteria?

A

Types 3 & 4