1)Which of the following is NOT a product of the Citric Acid Cycle? Citric acid
ID: 215953 • Letter: 1
Question
1)Which of the following is NOT a product of the Citric Acid Cycle?
Citric acid
CO2
NADH
FADH2
All of the above are products
3)In prokaryotes, where does glycolysis occur?
Cytoplasm
Rough ER
Mitochondria
Plasma membrane
4)Which of the following is/are products of the net reactions of glycolysis?
ADP
NAD+
Pyruvate
All of the above
5)In order for any endergonic reaction to proceed, energy must be provided by a coupled exergonic reaction. There is virtually always more energy released by the exergonic reaction than is consumed by the endergonic reaction. The energy left over is ________.
Released as heat
Converted to potential energy
Coupled to reduction of a coenzyme
Nothing – it disappears
2)Shown below is a skeleton of the Citric Acid Cycle with some of the by-products shown. Each reaction is numbered, and the number of carbons contained in each intermediate are indicated (e.g. 6C for 6 carbons). In addition to step 8, in which two steps are NADH produced?
1 and 3
2 and 7
2 and 5
3 and 4
Citric acid
CO2
NADH
FADH2
All of the above are products
Explanation / Answer
1. The answer is- all of the above are products.
In citric acid cycle all CO2, NADH and FADH2 are produced.
3. The answer is- Cytoplasm
In prokaryotes glycolysis takes place in the cytosol.
4. The answer is- pyruvate
Glycolysis breaks glucose into pyruvic acid and generates ATP and NADH.
5. The answer is- released as heat.
In a chemical reaction not all energy is utilized there are some energy always releases as heat energy. Rest of the energy can be used and we call it free energy.
2. The answer is- 3 and 4.
In Krebs cycle NADH is produced in 3, 4 and 8th steps.
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