Study guide 1 (pt 5) Flashcards
How many peptide bonds are formed in an oligopeptide of 4 amino acids?
3
How many water molecules are formed in the formation of 3 peptide bonds?
3
State the function of enzymatic catalysts
speed up reactions
A protein is a
biologically functional molecule made up of one more polypeptides
amino group, carboxyl group, alpha carbon and ‘R’ group.
H
I
NH4+ - C - COO-
I
R groupThere are _________ different amino acids in proteins
20
Which amino acids below will have an R group that is electrically charged at physiological pH?
serine, lysine, glutamic acid
Discuss how only 20 amino acids can be used to form a huge range of polypeptides.
they can be arranged in different combinations
The _________________ of amino acids determines primary structure of a protein
peptide bonds
bonds in secondary structure
hydrogen bonds
The union of _____________ or more polypeptides forms the _______________ structure.
two; quartinary
What molecule found in the nucleus determines the primary structure of a protein
sequence of DNA
Distinguish between the alpha helix and the beta-pleated sheet. What bond is responsible for these two structures?
alpha helix is coiled, beta pleated is straight
hydrogen bonds
List three types of non-covalent intermolecular forces that contribute to the tertiary structure of a protein.
hydrogen bonds, ionic bonds, hydrophobic interaction
Draw the disulfide bridge found in tertiary structure.
S-S
