Question

Proteins can provide energy when there is short supply of?
A) Vitamins
B) Water and Roughage
C) Carbohydrates and Fats
D) Minerals

Answer 1

Explanation:

) carbohydrates

Carbohydrates are a source of energy. Carbohydrates are converted into energy by combining with oxygen obtained by respiration. The byproducts are water and carbon dioxide

Answer 2

Protein can provide energy when there is a short supply of Carbohydrates and Fats

• The main source of energy for the body is carbohydrates.
• Carbohydrates on digestion is converted into glucose.
• This Glucose is metabolized in the mitochondria of the cell by a process known as glycolysis to produce 38 molecules of ATP.
• If sufficient glucose or glycogen(the stored form of carbohydrate in the liver) is not present, Lipids or fats are metabolized to form free fatty acids. These fatty acids undergo Beta- oxidation to form acetyl CoA
• Acetyl CoA enters the Krebs cycle in the mitochondria of cells to produce 14 molecules of ATP.
• During extreme starvation when these two sources of energy are not present in the body, Protein can be used to supply energy.
• Amino acids are converted to pyruvate or Acetyl CoA to form glucose and eventually provide energy.
• This process is known as gluconeogenesis
• Vitamins, minerals, and roughage do not provide energy to the body.

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