Chapter 2- the cell

Question 1

what are prokaryotes

Answer 1

cells that have no nucleus and contain DNA suspended in interior with no membrane bound organelles

Question 2

what are eukaryotes

Answer 2

cells that have DNA contained in a nucleus and typically has membrane systems

Question 3

what is cell theory

Answer 3

1. all orgs are composed on one or more cells
2. the cell is the basic structural and functional unit of life
3. cells arise from the division of pre existing cells

Question 4

what are the three domains

Answer 4

bacteria, eukaryotic and archaen

Question 5

what does RNA do

Answer 5

codes for cell functions

Question 6

what is magnification

Answer 6

in microscopy, the ratio of object to its real life size

Question 7

what is resolution

Answer 7

in microscopy, how clear the org is

Question 8

what are two types of microscopes

Answer 8

light microscopes and e- microscopes

Question 9

why are cells so small?

Answer 9

1. more chemical activity an occur in a smaller cell
2. more substances can be changed with much more efficiency in a small cell
3. cells can specialize

Question 10

what happens to the volume and surface area of a cell when its diameter is doubled?

Answer 10

its surface area increases by 4 and its SA increases by 8

Question 11

what is the plasma membrane

Answer 11

a phospholipid biklayerthat regulates movement in and out of the cell

Question 12

what are the components of a phospholipid mlcl?

Answer 12

a polar hydrophobic head and a non polar hydrophilic tail

Question 13

what are integral proteins

Answer 13

proteins that pass through the membrane and function in structure and transport of specific mlcls

Question 14

what are transport proteins

Answer 14

protein channels along the plasma membrane that only allow specific mlcls and ions to pass through