Assuming normal conditions, what happens after a large meal?
a. Pancreatic alpha cells are stimulated.
b. Adipose and muscle cells take up glucose.
c. Insulin levels fall.
d. Glycogen is converted to glucose.
e. The pancreas performs only exocrine functions.
ANSWER: b
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Most temperate phages integrate into the host chromosome, whereas some replicate as plasmids. Which kind of relationship do you think would be more likely to maintain the phage in the host cell, and why?
A. Plasmids-they're smaller, so they'd be easier to replicate by the host cell. B. Integrated-the host cell would be less likely to view this DNA as "foreign" on subsequent rounds of replication, and would retain it more easily. C. Plasmids-these structures often carry other genes that may give the host cell a selective advantage over cells that don't have them. D. Integration-because plasmids are frequently lost during cell division, which could leave a daughter cell without the virus genome.
This bacterium is the leading cause of human
bacterial disease and some strains are resistant to a wide range of antibiotics. This bacterium is
a. Clostridium tetani b. Corynebacterium diphtheriae c. Escherichia coli d. Staphlococcus epidermidis e. Staphlococcus aureus
You have drained a pond on your property to make it deeper. In the process of using a machine to dig, you find that the mud is black and smells terrible. Your prediction is that ________ bacteria predominate in this area of the mud.
A. nitrogen-fixing B. nitrifying C. sulfur-reducing D. sulfur-oxidizing E. denitrifying
Evolution, biological definition
What will be an ideal response?