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In proteins, amino acids are linked together by _______ bonds.

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Fatty acids are


A) carboxylic acids with long hydrocarbon tails.
B) linked to glycerol in fats by phosphodiester bonds.
C) always saturated.
D) large polymers of monosaccharides.
E) generally present in water soluble proteins.

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The covalent bond formed between the sulfur atoms of two cysteine side chains is called a _______.

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Steroids are classified as lipids because they


A) have a ring structure similar to glucose.
B) are composed of amino acids.
C) are composed of nonpolar and hydrophobic molecules.
D) are composed of molecules that are bound together with glycosidic linkages.
E) form alpha and beta isomers.

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Which of the following does not represent a correct monomer/polymer pairing?


A) Monosaccharide/polysaccharide
B) Amino acid/protein
C) Triglyceride/cellulose
D) Nucleotide/nucleic acid
E) Monosaccharide/oligosaccharide

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