Amino acids include a side group as well as ________
A) a central carbon, a hydrogen atom, an amino group, and a carboxyl group
B) a central carbon, a hydrogen atom, a hydroxyl group, and a carbonyl group
C) a central nitrogen, a carbon atom, a hydroxyl group, and a carbonyl group
D) a central nitrogen, a carbon atom, an amino group, and a carbonyl group
A
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Which of the following correctly lists the types of cellular communication from shortest to longest distance travelled by the signaling molecule to reach its responding cell?
A. paracrine, autocrine, endocrine B. autocrine, endocrine, paracrine C. autocrine, paracrine, endocrine D. endocrine, paracrine, autocrine
The modern human skull lacks which primate feature?
a. a large cranium b. supraorbital ridges c. small canine teeth d. a foramen magnuma e. rounded or U-shaped arrangement of teeth
Enzymes in the digestive tract catalyze hydrolysis reactions.
a. true b. false
Which is correct about influenza?
A. The virus is grown in poultry eggs for vaccines. B. Influenza A has a mortality rate of close to 35%. C. Antigenic shift is a minor change in the viral strain. D. The virus binds to the intestinal mucosa. E. The virus is found in swine and cats.