While many prokaryotic cells have a single membrane bilayer, all eukaryotic cells have a complex system of internal membrane-bound compartments. How might it be advantageous for the cell to have these additional compartments?
What will be an ideal response?
Compartmentalization using intracellular membranes allows eukaryotic cells to separate a variety of cell processes. Although this requires a higher degree of coordination, the cell also gains a more stringent degree of control over these processes (examples include: the separation of transcription and translation; the separation of enzymes involved in protein modifications for secreted versus cytosolic substrates; the separation of proteolytic events in the lysosomes versus the cytosol; the separation of anaerobic metabolism in the cytosol and aerobic metabolism in the mitochondria).
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The synthesis site for the hormones of this figure is indicated by the letter ____
a. A b. B c. C d. D e. E
On a humid day water condenses on the outside of a glass of ice water. this phenomenon occurs mainly because
What will be an ideal response?
Refer to the accompanying figure. Reabsorption of water occurs at the point(s) labeled as:
a. 3 and 9.
b. 5 and 8.
c. 6 and 10.
d. 8 and 10.
e. only 10.
The RNA polymerase ternary complex includes
a. sigma factor, core enzyme, rho factor, RNA, and DNA. b. sigma factor, core enzyme, RNA, and DNA. c. sigma factor, core enzyme, and DNA. d. sigma factor and core enzyme. e. core enzyme.