Bio 271 Exam 2 Practice Questions with Correct
Answers
Cells may seem static but that are actually very active and responsive. This means that
they are
dynamic
Which of the following is NOT a function of the plasma membrane?
produce hormones
What does it mean that the plasma membrane is a mosaic?
The membrane is made of many individual molecules
Which of the following is NOT a type of molecule found in the plasma membrane?
nucleic acids
Which of the following is a function of the glycocalyx?
protecting cell
Glucoamylase is a protein in the membrane of small intestine cells that catalyzes the
reaction that breaks down starch into glucose that can be used by the cells. What type of
membrane protein in glucoamylase?
membrane enzyme
hERG is a protein in the heart that allows potassium ions to flow out of the cardiac
muscle cells. What type of membrane protein in hERG?
transport protein
, Which of the following will increase the rate of diffusion of a substance across the
membrane?
increasing the concentration of the substance & increasing the temperature
Which of the following characteristics makes it easier for a molecule to cross the plasma
membrane?
non-polar & small size
Which type of transport is important in the digestive system for the movement of water
to from the small intestine into the blood?
osmosis
What type of transport allow Na+ to come into the cell down its gradient in order to
move glucose into the cell up its concentration gradient?
secondary active transport
Which type of transport is important in the kidneys for the movement of water to areas
of high salt concentration?
osmosis
Which type of transport allows Ca2+ ions to cross the membrane going down the
concentration gradient through a transport protein?
facilitated diffusion
Which type of transport uses ATP to move H+ ions up the concentration gradient?
ATPase pump
Answers
Cells may seem static but that are actually very active and responsive. This means that
they are
dynamic
Which of the following is NOT a function of the plasma membrane?
produce hormones
What does it mean that the plasma membrane is a mosaic?
The membrane is made of many individual molecules
Which of the following is NOT a type of molecule found in the plasma membrane?
nucleic acids
Which of the following is a function of the glycocalyx?
protecting cell
Glucoamylase is a protein in the membrane of small intestine cells that catalyzes the
reaction that breaks down starch into glucose that can be used by the cells. What type of
membrane protein in glucoamylase?
membrane enzyme
hERG is a protein in the heart that allows potassium ions to flow out of the cardiac
muscle cells. What type of membrane protein in hERG?
transport protein
, Which of the following will increase the rate of diffusion of a substance across the
membrane?
increasing the concentration of the substance & increasing the temperature
Which of the following characteristics makes it easier for a molecule to cross the plasma
membrane?
non-polar & small size
Which type of transport is important in the digestive system for the movement of water
to from the small intestine into the blood?
osmosis
What type of transport allow Na+ to come into the cell down its gradient in order to
move glucose into the cell up its concentration gradient?
secondary active transport
Which type of transport is important in the kidneys for the movement of water to areas
of high salt concentration?
osmosis
Which type of transport allows Ca2+ ions to cross the membrane going down the
concentration gradient through a transport protein?
facilitated diffusion
Which type of transport uses ATP to move H+ ions up the concentration gradient?
ATPase pump
