Release of cross-bridges depends most directly on
A. creatine phosphate.
B. potassium ions.
C. adenosine diphosphate.
D. adenosine triphosphate.
E. calcium ions.
Answer: D
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A large protein that passes through the nuclear pore must have an appropriate _________
(a) sorting sequence, which typically contains the positively charged amino acids lysine and arginine. (b) sorting sequence, which typically contains the hydrophobic amino acids leucine and isoleucine. (c) sequence to interact with the nuclear fibrils. (d) Ran-interacting protein domain. On the basis of these results, what is the function of protein B? Explain your conclusion and propose a mechanism for how protein B works.
What percentage of terrestrial plants are colonized by arbuscular mycorrhizae?
A) 10 B) 25 C) 50 D) 85
What can we find in cells that are making large quantities of proteins?
a. numerous cilia b. numerous ribosomes c. numerous centrioles d. numerous chromosomes
An older friend of yours who has been a dedicated jogger for many years has been having mild knee pain recently when jogging longer distances. He tells you his doctor recommended better-cushioned running shoes. He wonders why better shoes on his feet
will help his knees. Using the material you learned about the skeletal system, what can you say to help your friend understand his doctor's recommendation? What will be an ideal response?