Consider a protein that is targeted to be an integral membrane protein on the surface of a cell. It has a specific functional domain (domain X) facing the external environment of the cell. How will this protein be oriented in the E.R.?
A) It will be embedded in the E.R. membrane with domain X facing the cytoplasm of the cell.
B) It will be embedded in the E.R. membrane with domain X facing the lumen of the E.R.
C) It will be completely within the E.R. lumen, not embedded in the membrane.
D) It will be outside the E.R. as a peripheral membrane protein.
Ans: B) It will be embedded in the E.R. membrane with domain X facing the lumen of the E.R.
You might also like to view...
Blood is best classified as connective tissue because _____
A) its cells are separated from each other by an extracellular matrix B) it contains more than one type of cell C) its cells can move from place to place D) it is found within all the organs of the body
. If growers want fruit to drop from trees simultaneously they might apply:
A. auxins B. ethylene C. abscisic acid D. gibberellins E. brassinosteroids
A major organism considered to cause food-borne infection is
A. Salmonella. B. Pseudomonas. C. Staphylococcus. D. Bacillus.
In the Foofnagle family, the trait of being able to yodel affects members of both sexes in every generation. This trait could be
A) autosomal recessive or autosomal dominant. B) autosomal dominant but not autosomal recessive. C) conclusive or inconclusive. D) caused by something in the environment and not inherited at all.