Genomic studies of bacteria reveal that _____
A) only a few bacterial species have plasmids
B) there are usually three copies of each gene present within a bacterial genome
C) there are many genes of unknown function
D) there is almost no difference between the genomes of diverse bacteria
Answer: C
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Staphylococcus aureus can be identified by mixing the organism with specific antibody and visually recognizing a clumping reaction between the antigen and the antibody. This is a(n) ________ test.
A. biochemical B. ELISA C. microarray D. agglutination
The immediate stimulus for the release of milk from
the female breast is the a. culmination of the maternal instinct. b. excessive accumulation of milk. c. mechanical stimulation of the breast by sucking. d. time of day. e. interaction of hormones.
Repeating the sequence of the polymerase chain reaction doubles the number of DNA fragments each time
a. True b. False
If the sodium potassium pump is impaired due to insufficient potassium in the body:
A) the cells will shrink and eventually die. B) sodium accumulates and causes the cells to swell. C) excess sodium fills the extracellular space. D) water shifts from the cell and into the extracellular fluid.