To identify the species that is not a B-vitamin-containing coenzyme required in the common metabolic pathway. Concept introduction: Common metabolic pathway is the total sum of metabolic reactions that occur in stage third and fourth of the biochemical process or it is defined as the total sum of reactions that occur in the citric acid cycle and electron transport chain and oxidative phosphorylation. These stages are included in the common metabolic pathway because the reactions in these stages are the same for different kinds of food. The citric acid cycle is the third stage of the biochemical energy production process. The cycle includes the reactions in which the acetyl part of acetyl CoA is oxidized and leads to the formation of carbon dioxide and CoA-SH . Electron transport chain is a sequence of biochemical reactions in which electrons and hydrogen atoms from the citric acid cycle are transferred to various intermediate carriers and finally reacts with molecular oxygen to form a water molecule. The B-vitamins consist of a group of vitamins that are water soluble and acts as precursors for enzyme cofactors.

Question

A molecule shows peaks at 1379, 1327, 1249, 739 cm-1. Draw a diagram of the energy levels for such a molecule. Draw arrows for the possible transitions that could occur for the molecule. In the diagram imagine exciting an electron, what are its various options for getting back to the ground state? What process would promote radiation less decay? What do you expect for the lifetime of an electron in the T1 state? Why is phosphorescence emission weak in most substances? What could you do to a sample to enhance the likelihood that phosphorescence would occur over radiationless decay?

Answer 1

Question

Chapter 23.12, Problem 2QQ

Interpretation Introduction

Interpretation: To identify the species that is not a B-vitamin-containing coenzyme required in the common metabolic pathway.

Concept introduction: Common metabolic pathway is the total sum of metabolic reactions that occur in stage third and fourth of the biochemical process or it is defined as the total sum of reactions that occur in the citric acid cycle and electron transport chain and oxidative phosphorylation.

These stages are included in the common metabolic pathway because the reactions in these stages are the same for different kinds of food.

The citric acid cycle is the third stage of the biochemical energy production process. The cycle includes the reactions in which the acetyl part of acetyl CoA is oxidized and leads to the formation of carbon dioxide and CoA-SH.

Electron transport chain is a sequence of biochemical reactions in which electrons and hydrogen atoms from the citric acid cycle are transferred to various intermediate carriers and finally reacts with molecular oxygen to form a water molecule.

The B-vitamins consist of a group of vitamins that are water soluble and acts as precursors for enzyme cofactors.

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