In plant cells, vesicles transport proteins from the Golgi apparatus to
a. lysosomes.
b. vacuoles.
c. chloroplasts.
d. mitochondria.
Ans: b. vacuoles.
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You track aquatic coastal levels of nitrogen and phosphorus at high latitudes and notice a sharp increase in the winter and then again in the spring. What do you expect the effect of these nutrient increases will be on the plankton populations?
A. sharp spikes in population levels at essentially the same time (or, in phase) with the spikes in nutrients B. sharp spikes in population levels some time after (or, out of phase) with the spikes in nutrients C. a sharp spike in population levels in the spring, when light levels are higher; not much of a response in winter D. no effect of the changes in nutrient concentration on the plankton populations in either winter or spring
An organism that uses methane or methanol as its sole carbon and energy source is called a ________.
A. methanotroph B. methylogen C. methylotroph D. methanogen
Suppose a scientist is interested in studying DNA regulatory elements. What should she prepare first?
a. cDNA library b. genomic library c. transgenic mouse d. Northern blot e. DNA chip
Which of the following is most likely to be responsible if, when your blood sugar level rose, the level went back down?
A) the use of the sugar for energy by your cells B) a homeostatic mechanism based on negative feedback C) type 2 diabetes D) a homeostatic mechanism based on positive feedback