Peptidoglycan forms sheets that stiffen the cell walls of bacteria. How is the formation of sheets possible?
A) The polysaccharides in peptidoglycan are highly branched and form a network.
B) The glycosidic linkages between monosaccharides in peptidoglycan are extraordinarily strong.
C) Individual strands are joined by peptide bonds, a type of covalent bond.
D) The polysaccharides in peptidoglycan form helical structures, as in cellulose.
Answer: C
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a. total solute plus solvent concentration in a solution. b. total solvent concentration in a solution. c. ratio of solvent to solute in a solution. d. total solute concentration in a solution. e. ratio of solute to solvent in a solution.
Smooth muscle in the arteriole walls can vasoconstrict or vasodilate, which:a
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Glucose and fructose are ____ because they have identical molecular formulas but their atoms are arranged differently
a. polar b. tertiary c. enantiomers d. structural isomers e. geometric isomers
________ use electrons from reduced inorganic or organic compounds as a source of energy and CO2 as a source of carbon.
a) Photoautotrophs b) Photoheterotrophs c) Chemoautotrophs d) Chemoheterotrophs