In a sickled red blood cell, what do the hemoglobin molecules do?

a. repel each other
b. stick together
c. fracture and release their contents into the cytoplasm
d. create holes in the cell membrane
e. hold less tightly onto oxygen molecules


ANSWER: b

Biology & Microbiology

You might also like to view...

What phase does it occur when the # of chromosomes is reduced to half?

What will be an ideal response?

Biology & Microbiology

Sphincters

a. are muscles in longitudinal arrangement. b. prevent movement of material through the digestive tract. c. are smooth muscles. d. are only found at the beginning of the stomach. e. can contract but not relax.

Biology & Microbiology

Insects must molt to grow. How many times do insects molt?

a. One time b. 3-6 times c. 8-10 times d. At least ten times

Biology & Microbiology

The hormone ________ regulates the synthesis of HCl by parietal cells.

A. insulin B. gastrin C. glucagons D. pepsin

Biology & Microbiology