Proteins and Nutrition Worksheet

Explain why enzymes are important proteins in the body and give an example of a process they might regulate.

• Enzymes are proteins that regulate many body processes, such as digestion.

• Enzymes store energy for the body to use later.

• Enzymes are the main source of vitamins in the body.

• Enzymes help transport oxygen in the blood.

If a person’s diet lacks foods that provide all 9 essential amino acids, what type of protein are they most likely consuming?

• Complete protein

• Incomplete protein

• Animal protein

• Enzyme protein

Why is it recommended to eat a wide variety of foods throughout the day to obtain complete proteins?

• Because all foods contain all essential amino acids

• Because plant sources alone provide all essential amino acids

• Because combining different foods can supply all essential amino acids the body needs

• Because animal sources are not nutritious

How do amino acids contribute to the maintenance of healthy skin, hair, and nails?

• By providing vitamins directly.

• By maintaining healthy skin, hair, and nails.

• By storing fat in the body.

• By increasing blood sugar levels.

Leucine helps your body make protein and growth hormones. Which of the following is NOT a function of leucine?

• Helps grow and repair muscle tissue

• Heals wounds

• Regulates blood sugar levels

• Makes hemoglobin

Explain how the roles of histidine and isoleucine differ in the body, based on their functions described.

• Histidine is mainly involved in immune function and neurotransmitter production, while isoleucine is involved in muscle metabolism and energy regulation.

• Both are only involved in muscle growth.

• Isoleucine is responsible for sleep, while histidine regulates blood sugar.

• Histidine helps make hemoglobin, while isoleucine helps with digestion.

What is the main function of tryptophan in the body?

• Helps with muscle growth

• Maintains correct nitrogen balance and helps make serotonin

• Provides structure to connective tissue

• Forms blood clots

Explain how threonine contributes to both the immune system and fat metabolism. Use evidence from the information provided.

• Threonine helps form serotonin, which regulates mood and appetite.

• Threonine provides structure to skin and helps form blood clots, which are unrelated to the immune system or fat metabolism.

• Threonine plays an important role in fat metabolism and immune function, as well as forming proteins that support these processes.

• Threonine is only involved in muscle growth and energy production.

Which of the following is a nonessential amino acid?

• Alanine

• Lysine

• Methionine

• Threonine

Which of the following pairs are both nonessential amino acids?

• Alanine and Glutamine

• Lysine and Methionine

• Valine and Leucine

• Threonine and Isoleucine