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College > BIO 181 Quiz #5 > Flashcards

BIO 181 Quiz #5 Flashcards

1
Q

What is the building blocks of all organisms?

A

Cells

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2
Q

Magnification….

A

process of enlarging an object in appearance

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3
Q

Resolution…

A

ability of a microscope to distinguish two adjacent structures as separate

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4
Q

The higher the resolution…

A

the better the clarity and detail of the image

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5
Q

Compound light microscopes

A

bend visible light to provide magnification

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6
Q

Transparent objects must…

A

be treated with chemical stains to distinguish different parts

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7
Q

Electron microscopes

A

achieve higher magnification and resolution using beams of electrons

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8
Q

Transmission electron microscopes

A

can show fine detail within cells

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9
Q

Scanning electron microscopes

A

provide 3D exterior views

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10
Q

Light or electron microscopes provides better image?

A

Electron

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11
Q

What is cell theory?

A

-Cells basic units of life
-All living organisms made of cells
-All cells come from preexisting cells

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12
Q

4 common cell components

A

plasma membrane, cytoplasm, DNA, ribosomes

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13
Q

Which is smaller: prokaryotic or eukaryotic?

A

Prokaryotic

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14
Q

Why prokaryotic is smaller?

A

-Surface area/volume ratio more favorable to move material in & out
-Lack internal transport aid modifications which eukaryotes have

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15
Q

Prokaryotes lack…

A

membrane-enclosed internal compartments

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16
Q

Most prokaryotes have cell walls containing…

A

Peptidoglycan

17
Q

Which domains are prokaryotes?

A

Archaea & bacteria

18
Q

Where is DNA in prokaryote?

A

In region called nucleoid

19
Q

1500x

A

light microscope

20
Q

2,000,000x

A

electron microscope

21
Q

Two factors for faster diffusion?

A

Shorter distance and bigger surface area

22
Q

Bacteria and archaea do NOT have…

A

nucleus

23
Q

What is cell cremation?

A

Lose water & shrink

24
Q

What is cell lysis?

A

Bigger & bigger until cell pops

25
Q

70% plasma membrane

A

Phospholipids

26
Q

5% plasma membrane

A

cholesterol

27
Q

20% plasma membrane

A

proteins

28
Q

what does cholesterol do in plasma membrane?

A

regulates membrane fluidity

29
Q

what do microvilli do?

A

increase surface area of cell to absorb nutrients efficiently

30
Q

Human DNA genome

A

linear, several DNA molecules

31
Q

Prokaryotic DNA genome

A

circular, 1 DNA genome

College (1 decks)

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