5. 1 Biological catalysts

Question 1

alimentary canal

Answer 1

the part of the digestive system through which food passes as it moves from the mouth to the anus

Question 2

catalyst

Answer 2

a substance that increases the rate of a chemical reaction and is not changed by the reaction

Question 3

enzymes

Answer 3

proteins that are involved in all metabolic reactions, where they function as biological catalysts

Question 4

amylase

Answer 4

an enzyme that catalyses the breakdown of starch to maltose

Question 5

protease

Answer 5

an enzyme that catalyses the breakdown of protein to amino acids

Question 6

catalase

Answer 6

an enzyme that catalyses the breakdown of hydrogen peroxide to water and oxygen

Question 7

carbohydrase

Answer 7

enzymes that breakdown carbohydrate

Question 8

lipases

Answer 8

enzymes that break down lipids (fats and oils)

Question 9

maltase

Answer 9

an enzyme that breaks down sucrose

Question 10

sucrase

Answer 10

an enzyme the breaks down sucrose

Question 11

substrate

Answer 11

the substance that an enzyme causes to react

Question 12

active site

Answer 12

the part of an enzyme molecule to which the substrate temporarily binds

Question 13

complementary

Answer 13

with a perfect mirror - image shape

Question 14

product

Answer 14

the new substance formed by a chemical reaction

Question 15

enzyme-substrate complex

Answer 15

the short-lived structure formed as the substance binds temporarily to the active site of an enzyme

Question 16

specificity

Answer 16

of enzymes, only able to act on a particular (SPECIFIC) substrate