Regulation and alernitives

Question 1

What is a metabolic rate

Answer 1

the amount of energy consumed at a given and a measurement of overall C.R. reaction

Question 2

What is Phosphofructokinase

Answer 2

• controls C.R.
• catalyzes step 3 of Glycolysis

Question 3

What nutrient most organism catabolize first for energy

Answer 3

carbs
- when needed protein, nucleic acids, and lipids are metabolized

Question 4

what happens to macromolecules after they are digested into components

Answer 4

• reassembled
• metabolized energy by feeding into glycolsis kreb cycle

Question 5

what is the break down of fats

Answer 5

• have more energy per gram than carbohydrates or proteins (~2x as much)
• fatty acid chains are oxidized and broken into smaller 2 carbon chains
• the 2 carbon chains are converted into acetyl CoA to enter the Kreb’s cycle

Question 6

what is the break down of protein

Answer 6

• must be converted into individual amino acids
• excess amino acids are converted by enzymes into intermediate products of glycolysis and Krebs cycle
• amino acids go through deamination (amino groups are removed)
  -nitrogenous wastes from the amino groups are released as wastes
  -new compounds enter glycolysis or Krebs

Question 7

What lipids catabolism

Answer 7

• Triglycerides are digested into glycerol and fatty acids
• Glycerol can be converted into glucose by gluconeogenesis or into DHAP
• Fatty Acids are transported to the matrix, undergo beta-oxidation (conversion into acetyl CoA…enters the Kreb cycle)

Question 8

what is protein catabolism

Answer 8

• PRO’s broken down into individual A.A.’s in the body.
• First stage of this is deamination (removal of amino group as ammonia NH3), a waste.
• The remaining parts of the A.A.’s are converted into components of glycolysis or Krebs cycle