Amino acids are characterized by ____
a. an amino group and a hydrogen bond
b. a carboxyl group and a hydrogen bond
c. two R groups
d. an amino group, a carboxyl group, and an R group
e. an amino group and a hydrochloric group
d
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Cartilage injuries do not repair themselves because ________. a. All of these choices are reasons cartilage injuries do not repair themselves
b. cartilage does not receive nutrients very easily c. cartilage does not contain blood vessels d. None of these are reasons as cartilage does heal itself. e. cartilage does not divide in adults
Identify the trait that is NOT characteristic of the antifreeze protein of polar-dwelling fish
a. beta pleated sheet structure b. allows freezing to an ultrafine slush c. contains 37 amino acids d. ice binding probably by polar amino acids e. protein now produced by genetically engineered yeast
Complementary base-pairing allows for
A) spontaneous mutations to occur. B) genes to be expressed as a phenotype. C) DNA to serve as its own template for replication. D) replication to be semiconservative. E) covalent bonds to form between the opposite bases.
Which of the following bacteria that inhabit the mouth is involved in plaque formation?
A. Streptococcus mutans B. Haemophilus spp. C. Streptococcus viridans D. Lactobacillus spp. E. Staphylococcus spp.