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【单选题】
His bike is not here, but you can use _____. [ ]A.
me
B.
mine
C.
my
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皮皮学刷刷变学霸
举一反三
【单选题】The narrative of facilitation diffusion is wrong ( )
A.
Facilitated diffusion through carriers, such as the process of glucose entering the cell through cell membranes
B.
Facilitated diffusion through channels, such as the diffusion of K + and Na + from the high concentration side to the low concentration side of the membrane
C.
There is a high degree of structural specificity between the membrane protein as a carrier and the substance to be rotated
D.
Channel proteins are not specific for the substance being transported
【单选题】What are the membrane transporters that are responsible for both active transport and passive transport?
A.
Carrier proteins
B.
Channel proteins
C.
Porin （孔蛋白）
D.
ABC transporters
【单选题】The membrane proteins that play an important role in causing and maintaining Na +, K + unequal distribution inside and outside the cell are
A.
Carrier
B.
Ion pump
C.
membrane receptor
D.
Channel
【单选题】Which of the following statements are correct regarding G Proteins
A.
A GTP-binding protein (G protein) is located on the cytoplasmic face of the plasma membrane.
B.
Gs proteins can activate their downstream effectors when bound by GTP and also have the ability to hydrolyze GTP.
C.
The activated G protein can change the activity of an enzyme.
D.
All of the above are correct (A, B and C)
E.
The activated G protein cannot change the activity of an ion channel
【单选题】There are three major types of such membrane receptors. Which of the following membrane receptors is not one of them?
A.
G-Protein-linked receptors
B.
Active receptor relay proteins
C.
Receptor tyrosine kinases
D.
Ion channel receptors
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