Microbiology: Glycolosis, Kreb's Cycle (Citric Acid Cycle)
NAD+ and NADH
In the Citric Acid cycle, what is reduced?
where does the Krebs cycle occur in the cell?
matrix
glycolosis output:
output: 2 acetyl CoA 2 NADH 2 CoA 2 CO2
pre- kreb output
output: 2 acetyl CoA 2 NADH 2 CoA 2 CO2
how many ATP are formed from each original pyruvate molecule in each "turn" of the Krebs cycle?
1
how many carbons does acetyl-CoA have?
2
how many ATP molecule are formed by the whole process of glycolysis?
4
Is the Krebs Cycle the first, second, or third cycle of AEROBIC respiration?
Second
Which stage of cellular respiration is the Krebs Cycle?
Second
where did the carbon molecules given off in the Krebs cycle come from?
pyruvic acid, glucose
how many molecule are there at the beginning of glycolysis?
1
how many ATP are formed from each original glucose molecule?
2
how many ATP does it "cost" to rearrange the glucose molecule at the start of glycolysis?
2
how many ATP molecule are "lost" in the whole process?
2
how many molecules are there at the end?
2
what is the net yield in energy for 1 glucose molecule? how many ATP?
2
how many NADH and FADH are formed from each original pyruvate molecule in each "turn" of the krebs cycle?
4
how many co2 molecules are given off during the Krebs cycle?
4
how may carbons are there at the beginning of glycolysis?
6
how many NADH and FADH are formed from the original glucose molecule?
8
The Krebs Cycle serves as what?
A central metabolic pathway for generating building blocks for the cell.
when NAD+ become NADH, and FAD become FADH they are acting as electron acceptors. ETC takes all the electron acceptors from both glycolysis and the krebs cycle and converts them to.....
ATP
Why is the Krebs Cycle also known as the citric acid cycle?
Because citric acid is the very first product generated by this sequence of chemical conversions, and it is also regenerated at the end of the cycle.
The metabolic pathway of the citric acid cycle chemically converts what to what?
Carbohydrates, fats, and proteins into carbon dioxide, and converts water into serviceable energy.
Within the Krebs cycle, energy in the form of ATP is usually derived from the breakdown of what sugar?
Glucose
The matrix of the mitochondrion
In eukaryotic cells, the citric acid cycle occurs where?
Acetate (in the form of Acetyl- CoA) and water
In the Citric Acid cycle, what is consumed?
Faster
Is glucose consumption in an anaerobic environment faster or slower the glucose consumption under aerobic conditions?
What is the final product at the end of the Krebs Cycle?
Oxaloacetic acid
Krebs Cycle starts with what, which was what Cellular Respiration ended with?
Pyruvate
Aerobic
The Krebs cycle is a key component of the metabolic pathway by which all _______ organisms generate energy.
TCA stands for what?
Tricarboxylic Acid Cycle
It is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidization of acetate derived from carbohydrates, fats and proteins into carbon dioxide.
What is the Citric Acid Cycle?
Where does citric acid come from?
When Acetyl-CoA enters the Krebs cycle it combines with a four-carbon acid called oxaloacetic acid. The combination forms the six-carbon acid called citric acid.
where in the cell does glycolysis occur?
cytoplasm
facilitated diffusion
electron transport chain uses ....... to push the electrons to the matrix
carbons always come from....
glucose
what molecule does glycolysis start with?
glucose
NAD+ become NADH during glycolysis. What does this imply is happening to the original glucose molecule?
glucose is oxidized
pyruvate is the first molecule in the Krebs cycle, where does it come from?
glucose, glycolysis
the intermembrane has a ........ concentration of hydrogens
high
krebs cycle
input: 2 acetyl CoA (2 carbon compound) 2 (4 carbon compounds) 2 ADP 2 FAD 2 NAD+
glycolosis input
input: 2 pyruvic acids 2 CoA 2 NAD+
pre kreb input
input: 2 pyruvic acids 2 CoA 2 NAD+
krebs cycle
intermediate: 2 (6 carbon compounds) 2 (5 carbon compounds) 2 (4 carbon compounds)
krebs cycle
output: 4 CO2 2 ATP 2 FADH 6 NADH 2 (4 carbon compounds)
what is the name of the (2) compounds produced in glycolysis?
pyruvic acid
how many carbons are there at the end in each pyruvate compound?
3
what is given off during the first two steps of the Krebs cycle?
carbon dioxide, nadh