Which portion of an amino acid is unique among the different amino acids?

A. carboxyl
B. amino
C. hydrocarbon
D. the side chain or R-group
E. peptide bonding


D. the side chain or R-group

Biology & Microbiology

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The alternative pathways for viral infection—lytic and lysogenic—are determined by positive and negative regulatory effects of proteins produced by the virus following infection

A. true B. false

Biology & Microbiology

Chancroid

A. presents with a hard chancre. B. is caused by Haemophilus ducreyi. C. is very painful in both sexes. D. is caused by a spirochete.

Biology & Microbiology

The most humanlike australopith discovered so far is ____

a. Australopithecus afarensis b. Australopithecus africanus c. Australopithecus ramidus d. Australopithecus sediba e. Australopithecus kadabba

Biology & Microbiology

To be classified as a eukaryote, an organism must have

A) centrioles. B) a cell wall. C) flagella. D) internal membranes. E) sexual reproduction.

Biology & Microbiology