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Which of the following is NOT a digestive enzyme?
lipase
catalase
carbohydrase
protease
What is digestion?
the breaking down of large molecules into smaller ones that can be absorbed by the body
What does bile do?
neutralises stomach acid
how is the small intestine adapted for its function?
it has villi and microvilli that increase surface area, so more nutrients can be absorbed
what do enzymes do?
speed up chemical reactions
proteins are broken down into ...
amino acids
what is the part of an enzyme that a substrate binds to called?
active site
If a plant has yellowing leaves, which nutrient is it deficient in?
nitrogen
potassium
magnesium
water
If a plant has stunted growth, which nutrient is it deficient in?
magneisum
phosphate
nitrogen
water
which food test is benedict's solution used in?
protein
starch
sugars
lipids (fats)
kwashiorkor is a disease that causes children to have stunted growth, which nutrient are they deficient in?
protein
describe what happens when the amylase enzyme is added to starch
breaks starch down into glucose
what is a control variable?
the thing you keep the same
why are control variables used in experiments?
so you can compare results
why are scientific models useful?
they help us visualise unseen/hard to imagine processes, and can help to describe them
what does the lock and key hypothesis show us?
how enzymes and substrates bind together
