Wize AP Biology Textbook > Energy & Metabolism
Overview of Metabolism
Popular Courses
Find My Course
0:00 / 0:00
Overview of Metabolism
Metabolism is the collection of all chemical reactions that take place inside the cell.
- Anabolism refers to the metabolic pathways that synthesize complex molecules from simpler ones, using up energy. Example: making glucose from photosynthesis; proteins from amino acids.
- Catabolism refers to the metabolic pathways that break down complex molecules to simpler ones, releasing energy. Example: cellular respiration (breaking down glucose).
0:00 / 0:00
Nutrients Required by Cells
Cells require several nutrients in order to engage in catabolic and anabolic processes.
- Major bioelements (C, N, P, S, O, H)
- Minor bioelements (Fe, Ca, Mg, Zn, etc.)
- Vitamins
- Electrons
- Energy
Metabolic Classification
Organisms are grouped on the basis of their sources of energy, electrons, and carbon.
Practice: Organism Classifications
Describe the energy, electron and carbon source of the following organisms
a) Photoorganoheterotroph:
Energy source is (sunlight/ preformed molecules) .
Electron donor is (organic/ inorganic) compound.
Carbon source is (organic/ inorganic) compound.
b) Chemolithoheterotroph:
Energy source is (sunlight/ preformed molecules) .
Electron donor is (organic/ inorganic) compound.
Carbon source is (organic/ inorganic) compound.
Practice: Anabolism
Define anabolism:
Practice: Major Bioelements
Which one of the following is not a MAJOR bioelement?