Cells and Organelles

Question 1

Cell Theory (3 Basic)

Answer 1

1) All organisms are composed of 1 or more cells
2) cell is the basic unit of structure and organization in organisms
3) all cells come from pre-existing cells

Question 2

Cell Theory (new)

Answer 2

4) activity of an organism depends on total activity of independent cells
5) energy flow occurs within cells
6) cells carry and pass on heredity information
7) all cells of similar species have similar basic chemical composition

Question 3

Characteristics of all cells

Answer 3

• bound by plasma membrane
• genetic material
• contain ribosomes (not membrane bound, synthesize functional proteins from genetic material)

Question 4

Prokaryotic

Answer 4

no membrane-bound nucleus or organelles

Question 5

Eukaryotic Cells

Answer 5

membrane bound organelles

Question 6

Cell membrane Function

Answer 6

protect cell from environment
1) barrier
2) communicates with other cells
3) selective permeability transport
4) structural support and protection

Question 7

Selective Permeability Hydrophobic

Answer 7

small nonpolar
- cross without assistance
CO2, O2, N2, steroids

Question 8

Selective Permeability small uncharged polar

Answer 8

cross membrane
- H20, glycerol, Urea, ethanol

Question 9

Selective Permeability large polar

Answer 9

can’t move across
- glucose, sucrose

Question 10

Selective Permeability Ions

Answer 10

cannot move

Question 11

what is the cell membrane made by

Answer 11

• smooth ER
• amphipathic