BB451 Exam 1 questions with verified
solutions graded A+
The Citric Acid Cycle. It is also known as the... - correct answer ✔✔1. Tricarboxylic
Acid Cycle (TCA) - the 1 st intermediate, citrate, has 3 carboxyl groups
2.Krebs Cycle (because Hans Krebs was the first to describe it)
The CAC: 8-reaction cyclic pathway: _? carbons enter as ___? and _? carbons
leave as ___? - correct answer ✔✔1. 2
2. acetyl CoA
3. 2
4. CO2
Where do reactions take place for eukaryotes? - correct answer ✔✔mitochondria
Where do reactions take place for prokaryotes? - correct answer ✔✔cytosol
O2 is not directly used in CAC rxns but it is indirectly required to regenerate what?
- correct answer ✔✔electron carriers
the molecule entering the cycle is acetyl-CoA, which can be obtained from? -
correct answer ✔✔1. Pyruvate
2. B-oxidation of fatty acids
, 3. Ketone bodies
4. Amino acid metabolism
Outer membrane of mitochondria is ____ to small molecules - correct answer
✔✔permeable
The inner membrane is ____________ to ions and polar molecules but has
transport systems for specific substrates - correct answer ✔✔1. impermeable
The electron carriers are ____ and _____ - correct answer ✔✔NAD+ and FAD
What is Acetyle CoA made from? - correct answer ✔✔Pyruvate.
electrons entering Electron Transport System at the level of NADH pump enough
protons to make __ ATP; electrons entering at the level of FADH2 pump enough
protons to make __ ATP - correct answer ✔✔1. 2.5
2. 1.5
What is the total ATP produced in the citric acid cycle? - correct answer ✔✔7.5
ATP (from NADHx3) + 1.5 ATP (from FADH2x1) + 2.5 ATP (from NADH from
pyruvate DH step) = 11.5 ATP.
What is the source of pyruvate? - correct answer ✔✔Glycolysis
________ is a high energy carrier - correct answer ✔✔Coenzyme A
solutions graded A+
The Citric Acid Cycle. It is also known as the... - correct answer ✔✔1. Tricarboxylic
Acid Cycle (TCA) - the 1 st intermediate, citrate, has 3 carboxyl groups
2.Krebs Cycle (because Hans Krebs was the first to describe it)
The CAC: 8-reaction cyclic pathway: _? carbons enter as ___? and _? carbons
leave as ___? - correct answer ✔✔1. 2
2. acetyl CoA
3. 2
4. CO2
Where do reactions take place for eukaryotes? - correct answer ✔✔mitochondria
Where do reactions take place for prokaryotes? - correct answer ✔✔cytosol
O2 is not directly used in CAC rxns but it is indirectly required to regenerate what?
- correct answer ✔✔electron carriers
the molecule entering the cycle is acetyl-CoA, which can be obtained from? -
correct answer ✔✔1. Pyruvate
2. B-oxidation of fatty acids
, 3. Ketone bodies
4. Amino acid metabolism
Outer membrane of mitochondria is ____ to small molecules - correct answer
✔✔permeable
The inner membrane is ____________ to ions and polar molecules but has
transport systems for specific substrates - correct answer ✔✔1. impermeable
The electron carriers are ____ and _____ - correct answer ✔✔NAD+ and FAD
What is Acetyle CoA made from? - correct answer ✔✔Pyruvate.
electrons entering Electron Transport System at the level of NADH pump enough
protons to make __ ATP; electrons entering at the level of FADH2 pump enough
protons to make __ ATP - correct answer ✔✔1. 2.5
2. 1.5
What is the total ATP produced in the citric acid cycle? - correct answer ✔✔7.5
ATP (from NADHx3) + 1.5 ATP (from FADH2x1) + 2.5 ATP (from NADH from
pyruvate DH step) = 11.5 ATP.
What is the source of pyruvate? - correct answer ✔✔Glycolysis
________ is a high energy carrier - correct answer ✔✔Coenzyme A
