STRUCTURE AND PROPERTIES OF PEPTIDES QUIZ

hydrogen bonds are formed between the peptide bonds

the polypeptide chain is fully extended

adjacent polypeptide chains can either be parallel or antiparallel

All of these

Increase affinity in muscle cell otherwise decrease

No effect on oxygen affinity

Increase in oxygen affinity

Decrease in oxygen affinity

Val-Lys + Glu-Met-Ser + Trp-Arg-Ala.

Val-Lys-Glu-Met-Ser-Trp + Arg-Ala.

Val-Lys-Glu-Met + Ser-Trp-Arg-Ala.

Val-Lys-Glu-Met-Ser + Trp-Arg-Ala.

are a consequence of the quaternary structure of hemoglobin

both (a) and (b)

are identical

allow maximum transfer of oxygen to the tissues

histidine residues in the protein

the nitrogen atoms on the heme

the iron atom in the heme group

lysine residues in the protein

usually cis unless proline is the next amino acid

is planar because of steric hinderance

only found between proline residues

usually trans unless proline is the next amino acid

A P-pleated sheet

A multimeric protein

A globular domain

An a-helix

regular folding of regions of the polypeptide chain

linear sequence of amino acids joined together by peptide bond

three dimensional arrangement of all amino acids in polypeptide chain

protein made up of more than one polypeptide chain

0.5

0.1

0.9

1.7

Hydrogen bond

truly double bond

Van der waals force

partial double bond