Who developed the culturing technique to enrich for a certain population of microbial cells from a complex community based on a particular metabolic phenotype of interest?
a. Frederick Griffith
b. Joseph Lister
c. Martinus Beijerinck
d. Sergei Winogradsky
Answer: C
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During a stressful interval, _____
A) thyroid-stimulating hormaon (TSH) stimulates the adrenal cortex and medulla to secrete acetylcholine B) the alpha cells of islets secrete insulin and simultaneously the beta cells of the islets secrete glucagon C) adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla D) the posterior pituitary gland secretes more growth hormones E) the calcium levels in the blood are increased due to actions of two antagonistic hormones, epinephrine and norepinephrine
The protist that causes malaria is _____
a. multicellular c. colonial b. a single cell
Of the following, which is the most common
STD in the United States?
a. chlamydia b. genital herpes c. trichomoniasis d. HIV-AIDS e. gonorrhea
. One of the advantages of PCR is the ability to ____
a. sequence DNA b. transcribe DNA into mRNA transcripts c. make millions of copies of the entire genome d. double the amount of a rare DNA sequence e. make millions of copies of a rare DNA sequence