Which statement about the structure of proteins is false?
A) Proteins are made of long strings of 20 different common amino acids in different orders.
B) The order of amino acids in a polypeptide determines the three-dimensional shape of the folded molecule.
C) The chemical properties of each amino acid are determined by the amino acid's side chain.
D) Most proteins consist of two amino acid polymers attached together by hydrogen bonding.
D) Most proteins consist of two amino acid polymers attached together by hydrogen bonding.
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What role, if any, did polysaccharides play in chemical evolution?
A) Polysaccharides catalyzed chemical reactions. B) Polysaccharides used complementary pairing between monosaccharides to copy themselves. C) Glycosidic linkages formed spontaneously between monosaccharides. D) Polysaccharides played little, if any, role in chemical evolution.
The sensor kinase for the OmpF: OmpC two-component regulatory system is
A. the MicF RNA. B. the OmpK protein. C. the EnvZ protein. D. None of the choices are correct.
Regulatory secretion of hormones would be associated with ________ at the transface of the Golgi.
A) endosomes B) lysosomes C) clathrin-coated vesicles D) non-clathrin vesicles E) microsomes
If an individual has the genotype BbCc, how many different kinds of gametes can that individual produce?
A. one B. two C. three D. four