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Which of the following correctly describes the purpose of digestion?
To break down complex food molecules into simple soluble molecules
To make complex food molecules from simple soluble molecules
To make use of simple soluble food molecules
To remove complex food molecules from the body
Large food molecules need to be broken down to be small enough to pass through cell membranes.
People in the Arctic region live in conditions where temperatures are as low as -40 °C. What should their diet be rich in, to adapt to these conditions?
Which statement is NOT true about proteins?
Protein digestion begins in the mouth.
Proteins are used for cell growth and repair.
Proteins are broken down to form amino acids.
Some complex proteins function as enzymes in the body.
Which enzyme does the stomach produce?
Where is the digestion of food completed?
Why is the oesophagus muscular?
To break the food into even smaller pieces
To produce enzymes to digest food
To push food from the mouth into the stomach
To move the food back and forth in two directions
Where does carbohydrate digestion begins?
Where does protein digestion begins?
Where does fat digestion begins?
Select all the enzymes present in the intestinal juice.
Select all the enzymes present in the pancreatic juice.
Which of the following kills bacteria in the human alimentary canal?
Which food is unsuitable for a person who cannot secrete enough bile?
What are the names of the products formed by action of lipase on small fat droplets?
What is the name of the product formed by action of maltase on maltose?
What is the name of the product formed by action of protease on polypeptides or smaller protein molecules?
Name the enzyme that acts on starch.
What colour will starch turn brown iodine solution into?
Which of the following is a physical digestion?
Bile emulsifies fats into smaller fat droplets.
Glucose formed by maltase in the small intestine.
Protease breaks down the proteins.
Salivary amylase mixes with starch in the mouth.