Worksheet on Enzymes for Year 7 Students: What Are Enzymes? True or False: Enzymes Are Biological Catalysts That Speed up Chemical Reactions. Enzymes Are Specific in Their Action. What Does This Mean? What is the Substance That an Enzyme Acts Upon Called? Which Factors Can Affect the Activity of Enzymes? True or False: Enzymes Are Permanently Changed or Used up During a Chemical Reaction. What Happens to an Enzyme's Activity When the Temperature is Too High? What is the Optimum PH Range for Most Enzymes in the Human Body? What is Denaturation of an Enzyme? Give an Example of an Enzyme and Its Corresponding Substrate in the Human Body. Explain Why Enzymes Are Important for Digestion in the Human Body. How Can Enzymes Be Used in Industries or Everyday Life? What Are Some Common Sources of Enzymes? True or False: Enzymes Can Only Work Under Specific Conditions and Are Not Affected by External Factors. What is the Lock and Key Model of Enzyme Action? What is the Induced Fit Model of Enzyme Action? What is the Name of the Enzyme That Breaks Down Starch Into Glucose in the Mouth? What is the Name of the Enzyme That Breaks Down Proteins Into Amino Acids in the Stomach? What is the Name of the Enzyme That Breaks Down Fats Into Fatty Acids and Glycerol in the Small Intestine? What is the Name of the Enzyme That Converts Glucose Into Energy in the Cells?

Sure! Here's a worksheet about enzymes for year 7 students:

1. What are enzymes?

a) Proteins b) Carbohydrates c) Lipids d) Nucleic acids

1. True or False: Enzymes are biological catalysts that speed up chemical reactions in living organisms.

1. Enzymes are specific in their action. What does this mean?

a) They can only work on one type of substrate. b) They can work on any type of substrate. c) They can work on both substrates and products. d) They can work on any type of molecule.

1. What is the substance that an enzyme acts upon called?

a) Catalyst b) Substrate c) Product d) Inhibitor

1. Which of the following factors can affect the activity of enzymes?

a) Temperature b) pH c) Substrate concentration d) All of the above

1. True or False: Enzymes are permanently changed or used up during a chemical reaction.

1. What happens to an enzyme's activity when the temperature is too high?

a) It increases b) It decreases c) It remains the same d) It stops completely

1. What is the optimum pH range for most enzymes in the human body?

a) pH 1-3 b) pH 4-6 c) pH 7-9 d) pH 10-12

1. What is denaturation of an enzyme?

a) The process of an enzyme becoming inactive due to high temperature or extreme pH. b) The process of an enzyme becoming more active due to low temperature or neutral pH. c) The process of an enzyme changing its shape to fit the substrate. d) The process of an enzyme breaking down the substrate into products.

1. Give an example of an enzyme and its corresponding substrate in the human body.

1. Explain why enzymes are important for digestion in the human body.

1. How can enzymes be used in industries or everyday life?

1. What are some common sources of enzymes?

1. True or False: Enzymes can only work under specific conditions and are not affected by external factors.

1. What is the lock and key model of enzyme action?

1. What is the induced fit model of enzyme action?

1. What is the name of the enzyme that breaks down starch into glucose in the mouth?

1. What is the name of the enzyme that breaks down proteins into amino acids in the stomach?

1. What is the name of the enzyme that breaks down fats into fatty acids and glycerol in the small intestine?

1. What is the name of the enzyme that converts glucose into energy in the cells?

Feel free to modify or add more questions to suit your needs.