The rate of diffusion through a selectively permeable membrane will be lowest when ____
I. concentration gradients are steep
II. temperatures are low
III. solutes are small molecules
a. I only
b. II only
c. I and III
d. II and III
e. I, II, and III
ANSWER: b
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Kinesin is a motor molecule that is characterized by
A) activation of sliding in flagellar microtubules. B) sliding along actin in sarcomere. C) motion toward the "plus" end of the microtubule. D) motion along actin filaments. E) motion toward the "minus" end of the microtubule.
What is the difference between the blood types, A, B, and O?
A. A and B individuals have carbohydrate trees on the surface of red blood cells. O individuals do not have carbohydrate trees. B. For each blood type, A, B, and O, there is a different sugar attachment enzyme produced. C. A and B individuals have different modifications made to their carbohydrate tree. O individuals have no modifications made to their carbohydrate tree. D. The glycosyl transferase gene has a different mutation in A individuals than in B individuals. O individuals have no mutations in the glycosyl transferase gene. E. Two of these answers are correct. The glycosyl transferase gene mutations in A and B individuals prevent the removal of carbohydrate trees from the cell surface. O individuals have no mutations and therefore have no carbohydrate trees on the red blood cell surface.
Euryhaline species are able to tolerate wide ranges of temperature in estuarine environments
Indicate whether the statement is true or false
Explain the meaning and utility of RNA interference
What will be an ideal response?