Proteins are created with:
A. phosphodiester bonds.
B. peptide bonds.
C. triglycerides.
D. polysaccharides.
B
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A cyst formed by a protist functions
A. as a protective mechanism against adverse changes in the environment. B. in transfer from one host to the next. C. in repair of damage to the cell envelope. D. as a protective mechanism against adverse changes in the environment and in transfer from one host to the next.
Which of the following proteins is a transcriptional factor that binds genes and regulates the transcription of genes that promote cell division?
A. GRB2 B. epidermal growth factor C. myc D. raf-1 E. MAPK
Which of the following is characterized by the formation of a population of lymphocytes that can attack and destroy the foreign material?
a) hypersensitive immunity b) cell-mediated immunity c) acquired immunity d) humoral immunity
Amination is the addition of a(n) ________ group to a carbon skeleton.
A. phosphate B. carboxyl C. amino D. hydroxyl