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The majority of athletes can obtain an adequate amount of protein from eating a healthful diet.

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The enzymes that digest proteins in the small intestine are


A) proteases.
B) pepsins.
C) pepsinogens.
D) phosphofructokinases.

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A

The absorption of amino acids occurs in the


A) stomach.
B) small intestine.
C) large intestine.
D) muscle tissues.

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Which of the following is NOT a component of an amino acid molecule?


A) a central carbon
B) an amine group
C) an acid group
D) a fatty acid group

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Identify and describe the steps involved in protein synthesis.

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Protein synthesis is the process by whic...

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The positively charged electrolyte concentrated inside the cell is potassium,and the positively charged electrolyte concentrated outside the cell is


A) oxygen.
B) sodium.
C) hydrogen.
D) nitrogen.

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Conduction of nerve signals and contraction of muscles depends on the proper balance of


A) glucose.
B) electrolytes.
C) buffers.
D) nitrogen.

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Protein-energy malnutrition is seen only in developing countries.

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What dictates the structure of a protein molecule synthesized by the body?


A) the body's need for a protein
B) the DNA inside the nucleus of the cell
C) the number of essential amino acids available
D) the combination of proteins consumed in the diet

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B

To make a complete protein,complementary proteins must be eaten at the same meal.

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Consuming meat,poultry,and fish is necessary to build muscle and improve strength.

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In phenylketonuria (PKU) ,which amino acid becomes conditionally essential?


A) phenylalanine
B) tyrosine
C) alanine
D) cysteine

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As compared to the consumption of the same number of Calories in plant proteins,the production of beef releases more


A) water.
B) acid rain.
C) methane.
D) smog.

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Willa follows a vegan diet.Which of the following does she eat?


A) egg whites
B) plain yogurt
C) whole-grain bread dipped in olive oil
D) gluten-free pancakes with butter and honey

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Given the eight primary functions of protein in the body,explain why an individual consuming a diet deficient in protein is at increased risk for infection and for death from infectious disease.

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Proteins play a crucial role in the immune system, which is responsible for defending the body against infections. The eight primary functions of protein in the body include providing structure and support for cells, acting as enzymes to facilitate chemical reactions, transporting molecules throughout the body, regulating gene expression, and serving as antibodies to fight off pathogens. When an individual consumes a diet deficient in protein, their immune system may become compromised. This is because proteins are necessary for the production of antibodies, which are essential for recognizing and neutralizing harmful pathogens such as bacteria and viruses. Without an adequate supply of protein, the body may struggle to mount an effective immune response, making the individual more susceptible to infections. Furthermore, protein deficiency can also lead to a weakened physical state, making it harder for the body to fight off infections. This can increase the risk of developing severe complications from infectious diseases, and ultimately, increase the risk of death from these diseases. In summary, a diet deficient in protein can impair the immune system's ability to defend the body against infections, leading to an increased risk of infection and a higher likelihood of death from infectious diseases. Therefore, it is crucial for individuals to consume an adequate amount of protein to support their immune function and overall health.

The process of combining two incomplete proteins to make a complete protein is called


A) the protein-combining method.
B) amino acid sequencing method.
C) mutual supplementation.
D) protein harmonizing.

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Most of the proteins in the body are synthesized from


A) nine amino acids.
B) eleven amino acids.
C) twenty amino acids.
D) more than 300 amino acids.

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Which of the following processes involves both the synthesis of new proteins and the breakdown of existing proteins to amino acids?


A) transcription
B) translation
C) turnover
D) acidosis

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Which of the following is NOT a major function of protein in the human body?


A) maintaining fluid balance
B) providing energy to the blood cells and brain
C) growth and maintenance of new tissue
D) synthesis of hormones

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Which of the following plant-based foods provides the MOST complete protein?


A) spinach
B) soymilk
C) whole-wheat bread
D) pinto beans

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