Secondary active transport resembles transport by ion channels in that

29)Secondary active transport resembles transport by ion channels in that



 a. both types of transport can involve the movement of Na+ across the plasma membrane.

 b. both types of transport are indirectly linked to the hydrolysis of ATP.

 c. both can transport molecules against a concentration/electrical gradient.

 d. the same membrane proteins are used for both types of transport.

 e. both types of transport resemble facilitated diffusion.

30)Which of the following statements about membrane proteins is false?



 a. Hydrophilic regions of integral membrane proteins are in contact with the interior of the bilayer.

 b. Peripheral membrane proteins may be associated with the phospholipid head groups.

 c. Integral membrane proteins can move in the plane of the membrane.

 d. Some membrane proteins may have oligosaccharides attached to them.

 e. None of the above

31)Membranes may



 a. be electrically excitable.

 b. transform energy.

 c. transduce signals.

 d. organize chemical reactions.

 e. All of the above

32.
  The sodium?potassium pump (or Na+?K+ pump)



 a. is present in endomembranes.

 b. is an example of a secondary active transporter.

 c. results in the formation of a membrane potential across the plasma membrane.

 d. carries out facilitated diffusion.

 e. is a symporter.

 
33)Which of the following is not a function of exocytosis?



 a. Neurotransmitter secretion

 b. Secretion of digestive enzymes in the pancreas

 c. Lysosome formation

 d. Secretion of cell wall materials in plants

 e. Secretion of waste products

34)A universal feature of receptors is that they



 a. are present in the plasma membrane.

 b. are protein kinases.

 c. undergo structural (shape) changes when the signal molecule is bound.

 d. are ion channel proteins.

 e. are effector proteins.
35)ch of the following is not involved in the signal transduction pathway for the detection of odorants?



 a. A G protein

 b. Adenylyl cyclase

 c. A specific odorant molecule receptor

 d. A gated ion channel in the endoplasmic reticulum

 e. A cAMP gated ion channel

36)An external stimulus causes a specific intracellular response. Which is the most likely order in which signal transducers would work?



 a. G protein; cAMP; protein kinase

 b. protein kinase; cAMP; G protein

 c. cAMP; protein kinase; G protein

 d. protein kinase; G protein; cAMP

 e. cAMP; G protein; protein kinase