Unlike most excavates,Giardia trophozoites have no oral groove and are unable to form food vacuoles.Thus,we should expect its nutrition (mostly glucose)to come from
A)its mitosomes.
B)endosymbiotic cyanobacteria.
C)the ventral disk by which it adheres to the intestinal lining.
D)osmosis involving aquaporins (proteins that transport water across cell membranes).
E)plasma membrane proteins that are transporters or pumps.

Question

Quizplus · Accepted Answer

Without an oral groove or the ability to form food vacuoles, Giardia trophozoites must rely on transporters or pumps in their plasma membrane to obtain nutrition. Glucose, their primary source of energy, can enter the cell through facilitated diffusion using glucose transporters in the plasma membrane. Other nutrients can also be obtained through transporters or pumps, such as amino acid transporters or proton pumps.

Unlike Most Excavates,Giardia Trophozoites Have No Oral Groove and Are