A large pond on a farm contains blue gill and some crayfish. The pond is not very deep, and
with the changing seasons, the temperature of the water can vary substantially. Based on this,
which of the following is true?
a. More oxygen is available during the winter months.
b. Both blue gill and crayfish breath less during the summer months.
c. Less oxygen is available during the winter months.
d. Temperature impacts animal physiology, but not the availability of oxygen.
A
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Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue. It typically happens when an area of the body is injured or damaged, and an inflammation response is required. What role would you expect cell adhesion molecules to play in this process?
A. Cell adhesion molecules will allow the white blood cells to cling to one another to form a migrating clot. B. Cell adhesion molecules help white blood cells adhere to the blood vessel wall so that they can migrate across the wall and infiltrate into the underlying tissue. C. Cell adhesion molecules will allow the white blood cells to attach to the injured area so they become immobile.
Arrange the events in the pathway activated by G-protein-coupled receptors (GPCRs) in the correct order
1. Activation of effector 2. Activation of protein kinases 3. Receptor binds first messenger 4. Production of second messenger 5. Activation of G protein
a. 1?3?5?2?4 b. 2?3?5?4?1 c. 3?1?5?4?2 d. 3?5?1?4?2 e. 3?5?2?4?1
What powers the ATP synthase enzyme in the light-dependent reactions of photosynthesis?
a. energy from ATP b. energy from NADPH c. energy from the splitting of water d. energy from electron transfer chains e. energy from the flow of hydrogen ions
A virion consists of all but the following:
a. Capsomeres b. Nucleic acids c. Ribosomes d. In some viruses a viral envelope e. Capsid