Why do plants use cotransporters instead of ion channels to transfer anions into cells?
A) Cotransporters are able to transfer anions against the membrane potential gradient, but ion channels cannot.
B) Cotransporters can transfer ions across cell membranes, but ion channels cannot transport ions across cell membranes.
C) Cotransporters are able to transfer anions against the proton gradient, but ion channels cannot.
D) Anions are too bulky to be transported by ion channels.
Answer: A
You might also like to view...
Which of the following blood vessels carry CO2-rich (and oxygen-poor) blood back to the heart? Select all correct choices
A. venules B. arterioles C. veins D. arteries E. capillaries
Which one of the following statements about cerebrospinal fluid (CSF) specimens is false?
A) They are collected only by physicians. B) They are treated as STAT (emergency) specimens in the laboratory. C) They should always be refrigerated. D) They should be rushed to the laboratory after collection.
Adjacent animal cells utilize ____ to rapidly communicate with each other
a. gap junctions b. plasmodesmata c. hormones d. desmosomes e. neurotransmitters
Most of earth's fresh water is _____
a. in lakes and streams c. frozen as ice b. in aquifers and soil d. in bodies of organisms.