Exam 1 Flashcards
(27 cards)
What term applies to amino acids, nucleotides, and monosaccharides that are the building block components of their respective polymers
Monomers
What is that characteristic bond that links monosaccharides to form polysaccharides
Glycoside bond
What term describes stereoisomers of a given molecule that form mirror images of each other
Enantiomer
Any ol’ biochemistry student can count carbons in Greek , what Greek letter designates the amide carbon at the end of the R group of glutamine
Ś
What term describes an incomplete amino acid constituent of a poly peptide
Residue
What enzyme located in the large subunit of the ribosome, catalyzes peptide bond formation
Peptidyl transferase
By convention, depicting peptides from left to right (beginning to end) what term describes the end with the free amino group
N terminal
What common protein the major constituent of spider silk is an example of layers of polypeptides in beta conformation ( pleated beta sheet)
Fibrion
What term describes a poly peptide constituent of a protein that consists of more than one polypeptide
Subunit
What term describes a double or super Amino acids such as when cysteine is formed by linking two cysteine monomers by disulfide bond
Dimeric
What left hand secondary structure characterizes indeed it is unique to a given polypeptide chain of collagen
Alpha Collagen helix
What word describes the opposite but also more stable direction taken by adjacent polypeptide chain in the beta conformation ( pleated beta sheet)
Anti parallel
Which major category of protein is usually dominated by a single type of secondary structure within a constituent polypeptide
Fibrous protein?
What secondary structure is found where a polypeptide makes a sharp 180 hairpin turn
Beta bend
What common fibrous protein is characterized by two polypeptide of right-hand alpha helices wrapped in a left hand supercoil
Keratin
All of the covalent bonds that link amino acid residues of poly peptide including amino acids and disulfide bonds
Primary structure
Along main chain of polypeptide
Amino acid sequence
Rotation of 360 (theoretically) but interrupted by bulk and charge of R group
Bond rotation
Between Alpha Carbon & Amino group (H3N+) of residue
phi (φ)
Between alpha carbon and carbonyl (coo-) group of residue
psi (ψ)
Covalent bond between sulfur atoms of cysteine residue with same or different adjacent polypeptide
Disulfide Bond
Super amino acid also known as cystine WITHOUT the C
Dimeric
Any change in native conformation produced by changes in decrease in protein function
Denaturation
Weakens bonds by increasing thermal agitation
Heat
