Lecture 10 - How Does The Cell Release Energy From Food Flashcards
What is ATP involved in?
- Energy transfer (what we’re interested in)
- RNA synthesis
- Neurotransmission
ATP + H2O = ? What process is this?
- ADP + Energy
- Exergonic
- Happens via hydrolysis
How is coupling often achieved?
- Through the transfer of a phosphate
- Forms a phosphorylated intermediate
ATP forms a __________ intermediate. This ________ the shape of the molecule which ________ the _______ ________ of molecules.
- Phosphorylated
- Changes
- Allows
- Active Transport
ATP forms a __________ intermediate. This ________ the shape of the molecule which allows _______ ________ to occur.
- Phosphorylated
- Changes
- Molecular movement
How much ATP do we use per day?
- Nearly our body weight
How is ATP regenerated?
- From ADP + P
How do cells get energy out of food (glucose)?
- Fermentation
- Aerobic Respiration
- Some prokaryotes use oxygen
What is fermentation?
- Catabolism (break down of glucose) without oxygen
What is aerobic respiration?
- Catabolism with oxygen
What is oxidation?
Electron loss
What is reduction? (Reduction of +’ve charge)
Electron gain
Redox reductions may also involve movement of electrons within a molecule. True or False?
Truth
Where does the energy required for work come from?
- Redox reactions
- Energy required to pull electrons away from positive Carbon nucleus
- That energy is harvested by transferring the electrons to O2
- The cell performs this oxidation in a series of controlled steps
What does a dehydrogenase enzyme do?
- Removes two hydrogen atoms from glucose
- & Transfers the two electrons + 1 H+ to NAD+ to form NADH
