Proteins and Their Functions

What are proteins made up of?

• Amino acids

• Fatty acids

• Carbohydrates

• Nucleic acids

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How many different amino acids are commonly found in proteins?

• 10

• 15

• 20

• 25

What determines the shape of a protein?

• The order and properties of amino acids

• The size of the protein

• The temperature of the environment

• The pH level

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What is the primary structure of a protein?

• The sequence of amino acids

• The overall shape of the protein

• The function of the protein

• The number of polypeptide chains

Which type of protein speeds up chemical reactions in cells?

• Structural proteins

• Connective proteins

• Enzymes

• Antibodies

What is the function of antibodies?

• To help cells keep their shape

• To make up muscle tissues

• To transport items in and out of cells

• To target pathogens for destruction

What is the role of hemoglobin in human red blood cells?

• To bind with oxygen

• To speed up chemical reactions

• To defend against pathogens

• To store energy

How many levels of structure can a protein have?

• 1

• 2

• 3

• 4

Which amino acids must be consumed in foods?

• All of them

• Half of them

• One-third of them

• Nine of them

What happens to dietary proteins during digestion?

• They are broken down into amino acids

• They are converted into carbohydrates

• They are stored as fat

• They are eliminated from the body