Which of the following structures of proteins is composed of two or more polypeptide chains?
A) secondary
B) quaternary
C) tertiary
D) primary
Ans: B) quaternary
Biology & Microbiology
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How does temperature affect rate of an enzymatic reaction? Why are severe fevers dangerous?
What will be an ideal response?
Biology & Microbiology
With increasing altitude, air density ________
Fill in the blank(s) with correct word
Biology & Microbiology
The sex-determining chromosomes of a human male are the
A) Z and Z chromosomes. B) Y and Z chromosomes. C) X and Y chromosomes. D) Y and Y chromosomes. E) X and X chromosomes.
Biology & Microbiology
The fimbriae of Neisseria gonorrhea and enteropathogenic E. coli are examples of
A) adhesins. B) ligands. C) receptors. D) adhesins and ligands. E) adhesins, ligands, and receptors.
Biology & Microbiology