PORTAGE BIOCHEM MODULE 3 EXAM
2025/2026 QUESTIONS AND ANSWERS
100% PASS
Proteins - ANS Perform work in cell.
Number of different proteins in human body - ANS Over 20,000
Protein transport function - ANS Move molecules around cell and organism. Ex: hemoglobin
carries O from lungs to tissues
Protein hormone function - ANS communicate messages between cells. Ex: relaxin relaxes
pelvic ligaments during birth
Protein catalysis function - ANS Enzymes. Speed up or catalyze reactions. Ex: protease,
breaks down other proteins
Protein structure function - ANS Give strength to cells, organelles, and tissues. Ex: collagen
Protein protection function - ANS Help fend off bacteria and viruses, antibodies are proteins
1 @COPYRIGHT 2025/2026.
, Amino acids - ANS monomers of protein
Functional groups of in all amino acids - ANS carboxylic acid and amine group
C alpha - ANS Central carbon connecting amine and carboxylic acid functional groups.
Location of C alpha - ANS adjacent to carboxylic acid group
Effect of pH 7.4 on amino acid fuctional groups - ANS Carboxylic acid group loses hydrogen;
Amino groups gain an extra proton
Non-polar aliphatic - ANS Glycine
Alanine
Valine
Proline
Leucine
Isoleucine
Methionine
Non-polar aromatic amino acids - ANS Phenylalanine
Tryptophan
Tyrosine
Characteristics of aliphatic amino acids - ANS small, can interact with other groups; often
found on interior of protein, away from water
Unique properties of proline - ANS non-flexible structure; side chain bonds to N
2 @COPYRIGHT 2025/2026.
2025/2026 QUESTIONS AND ANSWERS
100% PASS
Proteins - ANS Perform work in cell.
Number of different proteins in human body - ANS Over 20,000
Protein transport function - ANS Move molecules around cell and organism. Ex: hemoglobin
carries O from lungs to tissues
Protein hormone function - ANS communicate messages between cells. Ex: relaxin relaxes
pelvic ligaments during birth
Protein catalysis function - ANS Enzymes. Speed up or catalyze reactions. Ex: protease,
breaks down other proteins
Protein structure function - ANS Give strength to cells, organelles, and tissues. Ex: collagen
Protein protection function - ANS Help fend off bacteria and viruses, antibodies are proteins
1 @COPYRIGHT 2025/2026.
, Amino acids - ANS monomers of protein
Functional groups of in all amino acids - ANS carboxylic acid and amine group
C alpha - ANS Central carbon connecting amine and carboxylic acid functional groups.
Location of C alpha - ANS adjacent to carboxylic acid group
Effect of pH 7.4 on amino acid fuctional groups - ANS Carboxylic acid group loses hydrogen;
Amino groups gain an extra proton
Non-polar aliphatic - ANS Glycine
Alanine
Valine
Proline
Leucine
Isoleucine
Methionine
Non-polar aromatic amino acids - ANS Phenylalanine
Tryptophan
Tyrosine
Characteristics of aliphatic amino acids - ANS small, can interact with other groups; often
found on interior of protein, away from water
Unique properties of proline - ANS non-flexible structure; side chain bonds to N
2 @COPYRIGHT 2025/2026.
