Respiration

Question 1

What is a coenzyme

Answer 1

A molecule which aids the function of an enzyme by transferring a chemical group from one molecule to another.

Question 2

Why does glycolysis happen in the cytoplasm of cells

Answer 2

Because glucose cant cross the outer mitochondrial membrane, but pyruvate can.

Question 3

What is substrate level phosphorylation and when does it occur

Answer 3

In the krebs cycle and it is when a phosphate group is directly transferred from one molecule to another

Question 4

Chemiosmosis

Answer 4

The electrochemical gradient caused by the protons in the intermembrane space into the matrix via atp synthase. This ATP production of H+ across a membrane.

Question 5

What is a respiratory substrate

Answer 5

A biological molecule that can be broken down in respiration to release energy as ATP.

Glucose enters in glycolysis

Proteins and lipids enter in the krebs cycle

Question 6

Who has the highest energy level for a substrate

Answer 6

Lipids contain the most hydrogen atoms per unit of mass to make the most ATP in oxidative phosphorylation.

Question 7

What is RQ

Answer 7

Respiratory Quotient

CO2 RELEASED/O2 PRODUCED

lipids 0.7
proteins 0.9
carbohydrates 1

Question 8

Why do plants have a low RQ

Answer 8

The CO2 released in respiration is used in photosynthesis so its not measured

Question 9

Anabolic and catabolic reactions

Answer 9

anabolic= smaller molecules make larger molecules

catabolic=larger molecules hydrolyise to smaller molecules