What type of protein makes metabolism function efficiently?
a. Enzymes
b. Messenger proteins
c. Transport proteins
d. Storage proteins
a
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Amino acids are linked by what kind of bonds
to form the primary structure of a protein? a. disulfide b. hydrogen c. ionic d. peptide e. none of these
Which of the following is not an advantage of uric acid excretion in terrestrial animals?
a. Uric acid can be excreted as a paste, thereby conserving water. b. Uric acid is not toxic and can be safely stored. c. Uric acid can be stored in the eggs of animals without harm to the embryos. d. Uric acid is soluble in water and can be easily excreted. e. Uric acid can be excreted along with feces in some animals.
Which group of gymnosperms is characterized by deciduous fan-shaped leaves, ovules, and pollen produced on separate plants, and flagellated sperm.
A. Gnetophytes B. Ginkgos C. Cycads D. Ferns E. Conifers
HIV attaches to T cell and macrophages by means of an interaction between gp120 and a(n) (antibody/CD4/gp41 ) receptor
What will be an ideal response?