Respiration in Plants
Respiration:
The process which helps in releasing of energy from cells of the body is respiration. It
is a
catabolic process.
Glycolysis:
Glycolysis is the metabolic process that serves as the foundation for both aerobic and
anaerobic
cellular respiration. In glycolysis, glucose is converted into pyruvate. Glucose is a six-
membered
ring molecule found in the blood and is usually a result of the breakdown of
carbohydrates into
sugars.
Aerobic Respiration:
The breakdown of glucose in cells in the presence of oxygen is called aerobic
respiration.
Here is the word equation for aerobic respiration. Energy is put in brackets because it
not a
substance:
glucose + oxygen → carbon dioxide + water (+ energy)
Example: C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP (energy currency of cell)
ATP (Adenosine triphosphate) undergoes hydrolysis to give adenosine diphosphate
(ADP),
inorganic phosphorus, and energy.
One mole of glucose yields 38 molecules of ATP on complete oxidation.
Breakdown of glucose occurs in 2 major events which are controlled by enzymes.
Kreb’s cycle or Citric acid cycle:
It is a series of chemical reactions used by all aerobic organisms to release stored
energy through
the oxidation of acetyl-CoA derived from carbohydrates, fats and proteins into carbon
dioxide and
chemical energy in the form of adenosine triphosphate, (ATP.) In addition, the cycle
provides precursors of certain amino acids as well as the reducing agent NADH that is
used in
numerous other biochemical reactions.
pyruvate → CO2 + 6H2O + energy
Anaerobic Respiration:
The breakdown of glucose in the absence of oxygen is called anaerobic respiration.
Sometimes, glucose undergoes incomplete oxidation to form ethanol and carbon
dioxide and a
lesser amount of energy is released. This is anaerobic respiration or fermentation. It
may occur
temporarily in plants and in our muscle cells when oxygen is not available. Some
bacteria and
fungi always show anaerobic respiration.
Respiration:
The process which helps in releasing of energy from cells of the body is respiration. It
is a
catabolic process.
Glycolysis:
Glycolysis is the metabolic process that serves as the foundation for both aerobic and
anaerobic
cellular respiration. In glycolysis, glucose is converted into pyruvate. Glucose is a six-
membered
ring molecule found in the blood and is usually a result of the breakdown of
carbohydrates into
sugars.
Aerobic Respiration:
The breakdown of glucose in cells in the presence of oxygen is called aerobic
respiration.
Here is the word equation for aerobic respiration. Energy is put in brackets because it
not a
substance:
glucose + oxygen → carbon dioxide + water (+ energy)
Example: C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP (energy currency of cell)
ATP (Adenosine triphosphate) undergoes hydrolysis to give adenosine diphosphate
(ADP),
inorganic phosphorus, and energy.
One mole of glucose yields 38 molecules of ATP on complete oxidation.
Breakdown of glucose occurs in 2 major events which are controlled by enzymes.
Kreb’s cycle or Citric acid cycle:
It is a series of chemical reactions used by all aerobic organisms to release stored
energy through
the oxidation of acetyl-CoA derived from carbohydrates, fats and proteins into carbon
dioxide and
chemical energy in the form of adenosine triphosphate, (ATP.) In addition, the cycle
provides precursors of certain amino acids as well as the reducing agent NADH that is
used in
numerous other biochemical reactions.
pyruvate → CO2 + 6H2O + energy
Anaerobic Respiration:
The breakdown of glucose in the absence of oxygen is called anaerobic respiration.
Sometimes, glucose undergoes incomplete oxidation to form ethanol and carbon
dioxide and a
lesser amount of energy is released. This is anaerobic respiration or fermentation. It
may occur
temporarily in plants and in our muscle cells when oxygen is not available. Some
bacteria and
fungi always show anaerobic respiration.
