Proteins and Enzymes

Multiple Choice

Which of the following are examples of proteins in the human body?

• Muscle, pepsin, insulin

• Glucose, starch, cellulose

• Cholesterol, phospholipid, triglyceride

• DNA, RNA, ATP

Multiple Choice

Which elements are found in all amino acids?

• Carbon, Hydrogen, Oxygen, Nitrogen

• Carbon, Hydrogen, Oxygen, Phosphorus

• Carbon, Hydrogen, Nitrogen, Calcium

• Carbon, Oxygen, Sulfur, Phosphorus

Multiple Choice

Which element is NOT found in all amino acids?

• Carbon

• Oxygen

• Nitrogen

• Phosphorus

Multiple Choice

What are proteins made of?

• Amino acids

• Nucleotides

• Fatty acids

• Monosaccharides

Multiple Select

Which of the following are functions that proteins can perform in the body?

• Transporting molecules through membranes

• Carrying oxygen through the blood

• Sending signals through the body

• Storing genetic information

Multiple Choice

Which of the following best describes the main function of proteins in living organisms?

• They provide energy for cellular processes.

• They store genetic information.

• They help build and repair tissues.

• They transport oxygen in the blood.

How are enzymes like fast passes at an amusement park?

How are enzymes like coupons?

Multiple Choice

How do enzymes speed up chemical reactions?

• By increasing the temperature

• By lowering the activation energy

• By increasing the amount of reactants

• By changing the products

Amylase and Starch Lab

​Observation

Amylase is an enzyme found in saliva that breaks down starch which is a carbohydrate. Iodine is an element that detects the presence of starch. If starch is present, the mixture turns dark blue or black

​Question

​What is the optimal temperature for the enzyme Amylase to break down starch?

​Background

​Carbohydrates such as bread or potatoes which contain starch seem to begin dissolving as soon as you put them in your mouth

Open Ended

What is your hypothesis?

• 3 Beakers

• 6 Test Tubes

• Prepared Amylase Solution

• Prepared Starch Solution

• Iodine Solution

• Wells

Materials

Methods

1. Label 3 Test Tubes The letter S for starch and the Temperature in degrees celsius

2. Label 3 Test Tubes with the Letter A for Amylase and the Temperature in degrees celsius

3. add a drop of iodine to each well

4. Add 5ml of amylase solution to the 3 labeled tubes

5. Add 5ml of starch solution to 3 tubes

6. Let each solution sit in the temperature baths for 5 minutes

7. Add the amylase solution to the starch solution

8. Mix thoroughly, then add the new mixture to each well with iodine, time for every 30 seconds each time you add to an iodine well

9. Record the results in the data table

Analysis/​Conclusion

Did your hypothesis match your results?
Why or why not?
What factors might have impacted the results of the experiment?

Open Ended

What is your conclusion?

How are enzymes like weekly discounts at select merchants?

Multiple Choice

What is the main role of enzymes in cells?

• Speeding up chemical reactions

• Providing structural support

• Transporting oxygen

• Storing energy

Multiple Choice

Which of the following best describes a chemical reaction?

• A substance reacts and changes in some way.

• A substance is mixed but does not change.

• A substance is heated but remains the same.

• A substance is dissolved in water.

Multiple Select

Which statements about enzymes are correct?

• Enzymes are proteins made by cells.

• Enzymes speed up chemical reactions.

• Enzymes can only break down molecules, not build them.

• Enzymes are found in every cell.

Multiple Select

Which of the following are functions of proteins in the body?

• Storage

• Regulatory

• Movement

• Photosynthesis

Multiple Select

Which of the following statements about enzyme substrates and active sites are correct?

• Substrates bind to the enzyme's active site

• The enzyme is changed permanently after the reaction

• The enzyme directs the reaction after binding the substrate

• Products are released after the reaction

Multiple Select

Which of the following statements about enzymes is/are correct?

• Enzymes are proteins that speed up chemical reactions.

• Enzymes are found in every cell.

• Enzymes slow down chemical reactions inside the cell.

• Enzymes are only found in animal cells.

Multiple Choice

What is one of the main functions of enzymes in cells?

• To break apart or digest large molecules

• To store genetic information

• To transport oxygen

• To provide structural support

Multiple Select

Which of the following statements about enzymes are correct?

• Enzymes can digest large molecules into smaller pieces.

• Enzymes can synthesize large molecules from smaller pieces.

• Enzymes are found only in animal cells.

• Enzymes are a type of protein.

Multiple Choice

What is the energy required to start a chemical reaction called?

• Activation energy

• Potential energy

• Kinetic energy

• Thermal energy

Multiple Choice

Which of the following best describes the main learning goal of this lesson?

• To explain the structure and function of proteins

• To memorize the names of amino acids

• To compare carbohydrates and lipids

• To draw the structure of DNA