Rothman and colleagues proposed that the specificity of a vesicle fusing with its target membrane lies in the interaction of pairs of proteins called v-(vesicle) and t-(target)
a. SNAPs.
b. SNAREs.
c. NSFs.
d. COPs.
Answer: b. SNAREs.
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Cattle benefit when _____ in their gut help them digest plant material
a. trypanosomes c. ciliates b. diatoms d. foraminiferans
Cilia in eukaryote cells can
A. assist digestive tract cells in absorbing food molecules. B. move in unison to establish a current to move objects, as with human eggs through the reproductive tract. C. beat in unison to help a single cell, such as a protist, to swim. D. add surface area for senses such as taste, smell, balance, and hearing. E. be used in eukaryotes to do any of these functions.
Proximity of capillaries to tissue cells is crucial
because a. bulk flow operates to move protein-free plasma through clefts between endothelial cells. b. red cells have to squeeze single file through capillaries. c. some proteins exit capillaries by endocytosis and exocytosis. d. this is where nutrient and waste exchange occur. e. all of these are true.
John Tyndall demonstrated that microorganisms present in the air are carried on dust particles.
Answer the following statement true (T) or false (F)