Once glucose has entered a cell, what prevents it from diffusing back out of the cell?
a. Glucose pumps actively transported any leaked glucose back into the cell.
b. One side of the cell membrane is permeable to glucose, but the other side is not.
c. Glucose inhibitors attach to glucose once it’s in the cell.
d. Glucose is phosphorylated, preventing it from leaving the cell.
e. Glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction.
ANSWER: d
You might also like to view...
Is natural selection the same thing as evolution?
A. Yes, they are the same because they both change populations. B. No, they are not the same because natural selection works on individuals, whereas evolution is change in populations. C. Yes, they are the same because they both involve phenotypes and genotypes. D. No, they are not the same because natural selection has never been observed.
During the termination stage
a. a STOP codon enters the ribosome. b. release factors bind the ribosome. c. mRNA detaches from the ribosome and the polypeptide chain. d. ribosomal subunits separate. e. all of these occur.
What are the two main types of mycorrhizae, and how do they differ? List three ways in which mycorrhizal
associations are beneficial to plants. What will be an ideal response?
Mobile prokaryotes can move around with the help of
A) endospores. B) flagella. C) sex pili. D) peptidoglycan. E) plasmids.