Chap 4 -1

Question 1

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

Answer 1

glass lenses/ light source

1000x

Question 2

What are light microscopes used for?

Answer 2

general shape

single cell movements, habits

Question 3

What are electron microscopes made of?

Answer 3

tungsten filament and magnetic lenses

Question 4

What are the two types of electron microscopes?

Answer 4

SEM scans surface 100,000x

TEM transmission, internal strutures 200,000x

Question 5

What are the two main types of cells?

Answer 5

Prokaryotes & Eukaryotes

Question 6

Which type of microscope can see DNA?

Answer 6

electron microscope

Question 7

What do cells have in common?

Answer 7

Plasma membrane 
Cytoskeleton 
DNA w/in a region
Cytoplasm 
Ribosomes

Question 8

What are prokaryotes?

Answer 8

small 1 um
simple cells
great metabolic diversity
unicellular organisms

Question 9

Prokaryotes domain bacteria can live?

Answer 9

anywhere

Question 10

Prokaryotes domain archaea can live?

Answer 10

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

Question 11

What are the different shapes of prokaryotes?

Answer 11

Coccus (spherical)
Bacillus (rod-shaped)
Spiral

Question 12

What are biofilms?

Answer 12

communal bacteria

Question 13

Where is DNA located in prokaryote cells?

Answer 13

a nucleoid region

Question 14

What is within DNA?

Answer 14

genes - code for RNA, protein

Question 15

Prokaryotes’ structure

Answer 15

plasma membrane folds inward
no membrane bound organelles
plasmids