GI Biochemistry

Question 1

What is cleaved by pepsin?

Answer 1

Pepsin cleaves the peptide bond in which the carboxyl group is contributed by aromatic amino acids (tryptophan, phenylalanine, tyrosine) and leucine Produced by chief cells in the stomach

Question 2

What is cleaved by trypsin?

Answer 2

Trypsin cleaves peptides bonds in which the carboxyl group in contributed by arginine or lysine (basic) Endopeptidase produced by the pancreas

Question 3

What is cleaved by chymotrypsin?

Answer 3

Chymotrypsin cleaves the peptide bond in which the carboxyl group is contributed by aromatic amino acids (tryptophan, phenylalanine, tyrosine) and leucine Endopeptidase produced by the pancreas

Question 4

What is cleaved by elastase?

Answer 4

Elastase cleaves at the carboxyl end of amino acids with small, uncharged side chains (alanine, glycine, serine) Endopeptidase produced by the pancreas

Question 5

What is cleaved by carboxypeptidase A?

Answer 5

Carboxypeptidase A cleaves aromatic amino acids (tryptophan, phenylalanine, tyrosine) from the C-terminal Exopeptidase produced by the pancreas

Question 6

What is cleaved by carboxypeptidase B?

Answer 6

Carboxypeptidase B cleaves basic amino acids (arginine, lysine) from the C-terminal Exopeptidase produced by the pancreas

Question 7

What is cleaved by aminopeptidase?

Answer 7

Aminopeptidase cleaves amino acids from the N-terminal Exopeptidase produced by enterocytes

Question 8

What is sucrose?

Answer 8

Glucose-alpha 1, 2-fructose

Question 9

What is lactose?

Answer 9

Galactose-beta 1,4-glucose

Question 10

What is maltose?

Answer 10

Glucose-alpha 1, 4-glucose

Question 11

What is isomaltose?

Answer 11

Glucose-alpha 1, 6-glucose