topic 9 Flashcards
what kind of tasks do cells perform that require energy from outside sources (4)?
- synthesis of macromolecules
- active transport
- movement
- reproduction
what are catabolic pathways?
production of energy (ATP) by breaking down organic compounds (cellular respiration)
what are anabolic pathways?
consumption of energy for synthesis of organic compounds (photosynthesis)
what are the two major cellular catabolic processes?
- cellular respiration (aerobic)
- fermentation (anaerobic)
what process takes place in chloroplasts?
photosynthesis (light and dark reactions)
what process takes place in mitochondria?
2 out of 3 stages of cellular respiration
where does glycolysis take place?
in the cytosol
where does Krebs cycle (citric acid cycle) take place?
in the mitochondrial matrix
where does oxidative phosphorylation take place?
in the inner mitochondrial membrane
catabolic pathways yield energy due to ____?
the transfer of electrons (redox reactions)
in which step of cellular respiration does most ATP get produced (90%)?
oxidative phosphorylation
what are the components of the mitochondria?
- outer membrane
- inner membrane
- matrix
- intermembrane space
what does the outer membrane of the mitochondria contain?
porins
what occurs in the inner membrane of mitochondria?
cristae formation (contains ETC complexes, ATP synthase)
what does the mitochondrial matrix contain?
it contains mitochondrial DNA and free ribosomes
