High School
SAT
ACT
University
MCAT
LSAT
DAT
Wize AP Biology Textbook > Cellular Respiration

Overview of Cellular Respiration

Calvin Cycle [Carbon Fixation] [detailed]Previous Section
Redox ReactionsNext Section
Popular Courses
Find My Course
0:00 / 0:00

Overview of Cellular Respiration

Cellular respiration is a set of catabolic reactions that allows organisms to convert biochemical energy from nutrients into ATP. Aerobic (meaning, in the presence of oxygen) cellular respiration can be broken down into 4 stages:
  1. Glycolysis
  2. Pyruvate processing / oxidation
  3. Citric acid cycle / Kreb’s cycle / tricarboxylic acid (TCA) cycle
  4. Electron transport chain (ETC) and ATP synthesis


PAGE BREAK

Molecules that can store energy

  1. ATP - energy carried via a phosphate group
  2. NADH or NADPH - energy carried via electrons and hydrogen
  3. FADH2 - energy carried via electrons and hydrogen

There are two types of cellular respiration: aerobic respiration (requires oxygen; redox reaction) and anaerobic respiration (does not require oxygen).