The alpha-helix and beta pleated sheet are examples of the ____ structure of a a

Question

The alpha-helix and beta pleated sheet are examples of the ____ structure of a a) primary (b) secondary c) tertiary d) quaternary Which type of forces stabilizes the secondary structure of a protein? a) Peptide bonds b) Hydrogen bonding between the carbonyl group and amino group of the peptide c) Salt bridges d) Dipole-dipole Which pair of amino acids can have nonpolar (hydrophobic) interactions? a) Arginine and glutamate b) Phenylalanine and valine c) Cysteine and cysteine d) Tyrosine and serine What type of stabilizing interaction could there be between the side chains of 1 and lysine? a) Disulfide bonds b) Hydrogen bonds c) Hydrophobic interactions d) Salt bridges The process of competitive inhibition can be overcome by: a) increasing the pH b) increasing the substrate concentration c) decreasing the temperature d) all of the above When a molecule binds to an enzyme at a site other than the active site and shape and reduces activity, it is called a(n): a) noncompetitive inhibitor b) competitive inhibitor c) irreversible inhibitor d) covalent modification

Explanation / Answer

22 - (b)

Alpha helix and beta pleated sheets are examples of secondary structure of proteins.

23 -(b)

24 - (b)

Phenylalanine is a non polar and can have hydrophobic interaction with valine

25 -(d)

26 - (b)

27 - (a)

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