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Home Q & A Board Science-Related Homework Help Health, Nutrition, and Food Sciences
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sarahnguyen sarahnguyen
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4 years ago
Food insecurity in poor countries is caused not by _____ but by _____.
 a. lack of available food on an international level; diminished local food supplies
  b. famine; lack of clean water
  c. political instability; lack of available food on an international level
  d. population growth; famine
  e. diminished local food supplies; natural disasters

Q. 2

Describe/summarize the four major stages of catabolism.

Q. 3

What percentage of people in poor countries do not have enough to eat?
 a. 12
  b. 14
  c. 16
  d. 18

Q. 4

Why would a bioterrorism agent that shut down the electron transport chain be of urgent concern for Homeland Security?

Q. 5

How many pounds of edible foods are lost per year by food retailers and producers, as estimated by the USDA?
 a. 96 million
  b. 110 million
  c. 96 billion
  d. 110 billion

Q. 6

Why might someone who eats a diet that contains inadequate amounts of niacin and riboflavin experience fatigue and feel tired?

Q. 7

Farmer McDonald allows volunteers from a local organization to collect any produce that gets left behind during harvest from his fields. These volunteers are participating in:
 a. gleaning.
  b. perishable food rescue.
  c. nonperishable food collection.
  d. backyard harvest.
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mariabbasmariabbas
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#1
Posts: 356
Rep: 7 0
4 years ago
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Answer to #1

a

Answer to #2

 Stage 1: complex molecules are broken down into their fundamental building blocks.
glycogenolysis  glycogen  glucose
proteolysis  protein  amino acids
lipolysis  triglycerides  fatty acids and glycerol molecules
 Stage 2: glucose, amino acids, fatty acids, and glycerol enter specific pathways in which each is converted into an intermediate product that can enter the citric acid cycle.
 Stage 3: intermediate products formed during Stage 2 enter the citric acid cycle and are broken down further to form carbon dioxide, releasing energy in the process. Much of the energy released during Stage 3 of metabolism is transferred to the coenzymes NAD+ and FAD, forming NADH + H+ and FADH2, respectively. In addition, small amounts of ATP are formed via substrate phosphorylation.
 Stage 4: begins when NADH + H+ and FADH2 enter the electron transport chain. The energy-yielding pathways of oxidative phosphorylation operate in nearly all cells to produce energy for cellular activities.

Answer to #3

c

Answer to #4

Oxidative phosphorylation accounts for approximately 90 of ATP production and involves a series of linked chemical reactions that make up the electron transport chain. If the body could not generate ATP via the electron transport chain, death would result.

Answer to #5

c

Answer to #6

Without sufficient niacin and riboflavin from the diet the body will not have the coenzymes essential to the operation of the electron transport chain, which produces about 90 of the body's ATP.

Answer to #7

a
This verified answer contains over 420 words.
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