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WorksheetsProtein Digestion and Absorption
Total questions: 15
Worksheet time: 8mins
Which foodstuffs below are the principal dietary proteins?
Meat, fish, and eggs
Legumes, nuts, seeds, and whole grains.
Dairy products.
Fruits and vegetables.
How does the stomach prepare dietary proteins for further digestion?
The stomach uses mechanical digestion to break down proteins into smaller pieces.
Stomach acid activates pepsinogen to pepsin, which begins protein digestion.
Proteins are absorbed directly into the bloodstream from the stomach.
The stomach neutralizes proteins before they enter the intestines.
Mia is studying the absorption of dietary proteins under normal circumstances in the small intestine. Can you explain how this process works?
Dietary proteins are absorbed as amino acids and small peptides in the small intestine.
Dietary proteins are absorbed as carbohydrates in the small intestine.
Proteins are fully digested and absorbed in the stomach.
Amino acids are excreted without absorption in the small intestine.
Which are the primary animal sources of dietary proteins from?
Fishes
Dairy products
Peas
Nuts
What is the action of HCl in the stomach during protein digestion?
Hydrolyzes proteins
Kills some bacteria
Denatures proteins
Synthesizes proteins.
What is the optimum pH for pepsin activity?
1-2
1.6-2.5
5
7-8
What are the proteolytic enzymes present in pancreatic juice?
Trypsin
Chymotrypsin
Carboxypeptidases
CCK
What is the role of enterokinase in protein digestion?
Hydrolyzes peptide bonds
Activates trypsinogen
Hydrolyzes amino acids
activates proinsulin
What is the absorption rate of L-amino acids compared to D-isomers?
L-aa more rapidly
D-isomers more rapidly
Equal rate
Not specified
What is the enyzme secreted by serous cells of the stomach for protein digestion?
Trypsinogen
Pro-amylase
Pro -lipase
Which are TRUE about pepsin?
Pepsin is a proteolytic enzymes.
What is the role of pepsin?
breaks the peptide bond.
breaks the ester bond
breaks the glycosidic bond.
breaks thecovalent of bond
Which are the metabolites of pepsin or rennin proteolitic action on milk casein?
proteose, paracasein
peptone, pepsin
Ca-paracaseinate, proteose
proteose, protein
Whic is TRUE about gastricin?
a proteolytic enzyme
secreted in zymogen form
digest carbohydrate
reduces gastric motility
Trypsin act on Arginine residue of _________.
pepsin
chymotrypsin
enterokinase
carboxypeptidase.
