Describe the relationship of protists to the major groups of eukaryotes. What will be an ideal response?
ANSWER: Protists seem to have been the pathway to land plants, animals and fungi. Many protist
groups are only distantly related to each other. Some are more closely related to plants, fungi,
or animals than to other protists.
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Which of the following statements correctly characterizes the relationship between NADP+/NADPH and NAD+/NADH?
A) Both are used extensively during photosynthesis in oxygenic phototrophs. B) Neither are helpful to oxygenic phototrophs. C) NADP+/NADPH has an extra phosphate compared to NAD+/NADH. D) NADP+/NADPH is used primarily for catabolic reactions. E) Only NAD+/NADH is used to transport electrons and protons.
Compare the leakage rates of sodium and potassium into and out of a neuron at rest. How is the relationship between these rates best described?
A. Leakage of sodium ions out of the neuron is greater than leakage of potassium ions into the neuron. B. Leakage of sodium ions into the neuron is greater than leakage of potassium ions out of the neuron. C. Leakage of potassium ions out of the neuron is greater than leakage of sodium ions into the neuron. D. Leakage of potassium ions into the neuron is greater than leakage of sodium ions out of the neuron. E. Leakage of potassium ions out of the neuron is equivalent to leakage of sodium ions into the neuron.
The drug Gleevec is useful in the treatment of:
A) acromegaly B) chronic myelogenous leukemia C) heart disease D) influenza E) diabetes
You insert a fragment of sheep DNA into a plasmid containing an AmpR gene. You transform bacteria with the recombinant plasmid, and plate the cells on growth media containing the antibiotic ampicillin. Each colony on the plate arose from ________ that ________ to ampicillin.
A. many bacteria; are sensitive B. a single bacterium; is resistant C. a single bacterium; is sensitive D. many bacteria; are resistant