Chap 4 -1 Flashcards Preview

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Flashcards in Chap 4 -1 Deck (15):
1

What are light microscopes made of and how much do they magnify?

glass lenses/ light source
1000x

2

What are light microscopes used for?

general shape
single cell movements, habits

3

What are electron microscopes made of?

tungsten filament and magnetic lenses

4

What are the two types of electron microscopes?

SEM scans surface 100,000x
TEM transmission, internal strutures 200,000x

5

What are the two main types of cells?

Prokaryotes & Eukaryotes

6

Which type of microscope can see DNA?

electron microscope

7

What do cells have in common?

Plasma membrane
Cytoskeleton
DNA w/in a region
Cytoplasm
Ribosomes

8

What are prokaryotes?

small 1 um
simple cells
great metabolic diversity
unicellular organisms

9

Prokaryotes domain bacteria can live?

anywhere

10

Prokaryotes domain archaea can live?

only in extreme conditions (hot springs, dead sea, in animals)

11

What are the different shapes of prokaryotes?

Coccus (spherical)
Bacillus (rod-shaped)
Spiral

12

What are biofilms?

communal bacteria

13

Where is DNA located in prokaryote cells?

a nucleoid region

14

What is within DNA?

genes - code for RNA, protein

15

Prokaryotes' structure

plasma membrane folds inward
no membrane bound organelles
plasmids