Proteins and Enzymes
Presentation
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Science
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9th - 12th Grade
•
Practice Problem
•
Medium
+10
Standards-aligned
Chelsea Briggs
Used 6+ times
FREE Resource
35 Slides • 25 Questions
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5
Fill in the Blanks
Proteins are made of long chains of
6
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
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8
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
9
Multiple Choice
Which element is NOT found in all amino acids?
Carbon
Oxygen
Nitrogen
Phosphorus
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11
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13
Multiple Choice
What are proteins made of?
Amino acids
Nucleotides
Fatty acids
Monosaccharides
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Fill in the Blanks
The bond that holds amino acids together in a protein is called a
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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
19
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.
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Fill in the Blanks
Protein synthesis takes place at the
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Fill in the Blanks
The enzyme that helps digest lactose is called
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34
Fill in the Blanks
The energy required to start a chemical reaction is called
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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
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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
What is the optimal temperature for the enzyme Amylase to break down starch?
Carbohydrates such as bread or potatoes which contain starch seem to begin dissolving as soon as you put them in your mouth
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Open Ended
What is your hypothesis?
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3 Beakers
6 Test Tubes
Prepared Amylase Solution
Prepared Starch Solution
Iodine Solution
Wells
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Methods
Label 3 Test Tubes The letter S for starch and the Temperature in degrees celsius
Label 3 Test Tubes with the Letter A for Amylase and the Temperature in degrees celsius
add a drop of iodine to each well
Add 5ml of amylase solution to the 3 labeled tubes
Add 5ml of starch solution to 3 tubes
Let each solution sit in the temperature baths for 5 minutes
Add the amylase solution to the starch solution
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
Record the results in the data table
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Analysis/Conclusion
Did your hypothesis match your results?
Why or why not?
What factors might have impacted the results of the experiment?
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Open Ended
What is your conclusion?
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Multiple Choice
What is the main role of enzymes in cells?
Speeding up chemical reactions
Providing structural support
Transporting oxygen
Storing energy
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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.
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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.
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Multiple Select
Which of the following are functions of proteins in the body?
Storage
Regulatory
Movement
Photosynthesis
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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
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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.
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Fill in the Blanks
A chemical reaction occurs when a substance reacts and
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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
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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.
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Multiple Choice
What is the energy required to start a chemical reaction called?
Activation energy
Potential energy
Kinetic energy
Thermal energy
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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
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