Lecture 9 Flashcards
What is the point of cellular respiration?
Complete oxidation of glucose to convert energy into ATP
What are the phases of cellular respiration?
1.Glycolysis 2.Transition reaction 3.Krebs Cycle 4.Oxidationphosphorylation
What happens during Glycolysis?
The transition of Glucose to Pyruvate
What’s the first step of Glycolysis?
Hexokinase phosphorylases glucose using one ATP
What’s the third step of Glycolysis?
PFK phosphorylates the result of step 2 using one ATP. It is the main regulatory step
What’s a Kinase?
An enzyme that phosphorylates
What does the Energy Payoff Phase of Glycolysis do? How many times do these set of reactions happen?
Produces 4 ATP and 2 NADH per glucose. These reactins happen twice for each of the 3C compounds made in thelast 5 reactions. Pyruvate it the product of these reactions (2 for 1 glucose)
What does the Energy Payoff Phase of Glycolysis do? How many times do these set of reactions happen?
Produces 4 ATP and 2 NADH per glucose. These reactions happen twice for each of the 3C compounds made in the last 5 reactions. Pyruvate it the product of these reactions (2 for 1 glucose)
What is the transition reaction?
Pyruvate crosses the mitochondria membranes to reach the matrix, becoming Acetyl-CoA which has 2 carbons. CO2 is released and a NADH is produced.
What happens in the Krebs Cycle?
Glucose is completely oxidized. Acetyl-CoA (2C) enters and is added to oxoacetate (4C) to produce 6C citrate 2 NAD+ and 2 H+ oxidize 2 Cs in the citrate to produce 2 CO2. This leaves behind a 4C compound. GDP and Pi enter and come out a GTP which SLPs to become ATP. After this a FAD+ and 2H+ take an electron from the 4C and produce FADH2, NAD+ and H+ also steal an electron from 4C to produce NADH. Oxoacetate is left and goes on to continue the cycle. This has to happen twice per glucose
What is SLP?
Substrate Level Phosphorylation. When energy for ATP synthesis comes from the dephosphorization of a substrate
What happens in the ETC?
A series of redox reactions to create a H+ pump. O2 is used as a TEA to remove the electron from the chain. This leaves water as a waste
What is a TEA?
A terminal electron acceptor. It is a good electron acceptor
What happens inn oxidativephosphorylation? How many ATP are produced?
an ATP synthase is powerd by the H+ gradient produces from redox reactions. H+ flow into the matrix through an ATP synthase that is in the opposite orientation of ATP syntahse in Photosynthesis. 28 ATP are produced
What happens inn oxidative phosphorylation? How many ATP are produced?
an ATP synthase is powered by the H+ gradient produces from redox reactions. H+ flow into the matrix through an ATP synthase that is in the opposite orientation of ATP synthase in Photosynthesis. 28 ATP are produced
