cell biology - cell organization and cell membrane - pre-class quiz

Question 1

the cytoskeleton is primarily made up of-
a) lipids
b) carbohydrates
c) proteins

Answer 1

c) proteins

Question 2

true or false: a cell must have a nucleus

Answer 2

false

Question 3

which of the following types of proteins in the cell membrane could be compared to a keyhole
a) receptor
b) transporter
c) anchor
d) enzyme

Answer 3

a) receptor

Question 4

true or false: molecules that are fat-soluble can pass directly through the cell membrane

Answer 4

true

Question 5

what part of the cell membrane is attracted to water?
a) phosphate heads
b) lipid tails
c) both are attracted to water
d) neither are attracted to water

Answer 5

a) phosphate heads

Question 6

true or false: the cytoskeleton helps move substances

Answer 6

false

Question 7

true or false: molecules in the cell membrane are fixed in place (i.e., they don’t move)

Answer 7

false

Question 8

what is the benefit of molecules which form the cell membrane to be able to move.
a) allows membrane to be permeable
b) allows for cell membrane to have two layers
c) allows membrane to be impermeable

Answer 8

a) allows membrane to be permeable

Question 9

which type of molecule will generally need a channel in order to cross the cell membrane?
a) fat-soluble molecule
b) fat-soluble and water-soluble molecules will need a channel
c) water-soluble molecule

Answer 9

c) water-soluble molecule