How are the membranes of animal cells in winter able to remain fluid when the weather becomes extremely cold?
a. The percentage of both unsaturated phospholipids and cholesterol increases.
b. The percentage of saturated phospholipids in the membrane decreases.
c. The percentage of unsaturated phospholipids in the membrane decreases.
d. The percentage of cholesterol molecules in the membrane increases.
Ans: a. The percentage of both unsaturated phospholipids and cholesterol increases.
You might also like to view...
Which of these ecosystems has the lowest productivity?
A. tropical forest B. tundra C. savanna D. open ocean E. lake
________, a recombinant clotbusting drug, is used to limit damage to heart muscle by restoring blood flow.
A) Insulin B) Tissue plasminogen activator C) Interleukin-2 D) Glucocerebrosidase
The subatomic particle(s) with no charge is(are)
a. the neutron. b. the proton. c. the electron. d. both the neutron and proton. e. both the proton and electron.
Which statement is least consistent with the beliefs of Lamarck?
A. “Fluida” moves into areas of the body in need of change. B. Acquired characteristics are inherited. C. Giraffes’ necks have become longer in response to stretching. D. Environmental pressures bring about changes in organisms. E. Changes in an individual are not passed to its offspring.