Cell respiration

Question 1

Cellular respiration?

Answer 1

One of the most important metabolic reactions. Organic molecules, taken in as food, broken down in cells to release energy for the cells activities.

Question 2

Cell respiration formula?

Answer 2

C6H12O6 + 6O2 ~> 6Co2 + 6H2O + ATP
In words:
sugar + oxygen ~> carbon dioxide + water + usable energy

Question 3

Energy release?

Answer 3

60% is heat - used for keeping body warm - most useless
Other 40% is used to form ATP adenosine triphosphate

Question 4

ATP how it work what is it?

Answer 4

Phosphate joins ADP adenosine diphosphate
energy stored between the bond of the second and third phosphate group
- Snapping third phosphate releases energy
-forms ADP
-Need more ATP in cell it will have more mitochondria

Question 5

Glycolysis?

Answer 5

1st stage of breakdoen of glucose
1 glucose molecule is broken down into 2 pyruvate/pyruvic acid
requires no oxygen releases energy to convert 2 ADP molecules to 2 ATP Enzymes for this reaction are in the cytosol, therefore Glycolysis occurs in the cytosol

Question 6

Anaerobic respiration?

Answer 6

the 2 pyruvate produced in glycosis is converted into 2 lactic acid if theres no oxygen

Question 7

What’s Anaerobic respiration for and what happens with lactic acid?

Answer 7

Important in:
Vigorous physical activity
produces lactic acid
What happens to lactic acid:
taken by the blood to the liver combines with oxygen to make more glycose
requires oxygen
creates an oxygen debt (recovery oxygen - heavy breathing)

Question 8

Aerobic respiration?

Answer 8

The pyruvic acid is complety broken down and now requires oxygen
Occurs in the mitochondria
Enzymes for the reaction are attached to the inner membrane - cristae

Question 9

Intermediary step of cellular respiration?

Answer 9

2 pyruvate to enter the next pathway it converts into 2 acetyl coenzyme A (acytl CoA)
CoA Co2 molecule is released

Question 10

Citric acid cycle/ Krebs cycle?

Answer 10

2nd step
the acetyl CoA enters the Kreb cycle
the carbon atoms in the CoA are released in Co2 For every 2 molecule of acetyl CoA that enters the cycle 2 molecule of ATP is produced

Question 11

Electron transport chain/system?

Answer 11

Electrons are passed between molecules resulting in oxygen forming water
up to 34 molecules of ATP are formed (less can be formed)

Question 12

How many ATP created in cellular respiration?

Answer 12

Up to 38.