How are exocytosis and endocytosis similar to each other?
a. They both transport large molecules.
b. They both transport materials into cells.
c. They both transport materials out of cells.
d. They both transport small molecules.
Ans: a. They both transport large molecules.
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Why is ATP an important molecule in metabolism?
A) Its hydrolysis provides an input of free energy for exergonic reactions. B) It provides energy coupling between exergonic and endergonic reactions. C) Its terminal phosphate group contains a strong covalent bond that, when hydrolyzed, releases free energy. D) Its terminal phosphate bond has higher energy than the other two phosphate bonds. E) It is one of the four building blocks for DNA synthesis.
If the age-specific fertility rate is such that 100 females of age class x would produce 50 offspring, what is the contribution of age class x to the overall population growth rate?
A. 0.75 B. 0.5 C. 2 D. 50 E. cannot be calculated with this information.
Which of the following factors is related to patch colonization?
A) size of the patch B) isolation of the patch C) number of patches D) all of the above
All of the following represent anchoring junctions EXCEPT
A. tight junctions. B. focal adhesions. C. desmosomes. D. adherens junctions. E. hemidesmosomes.