Biochemistry, The Molecular Basis of Life, 6th Edition
Biochemistry, The Molecular Basis of Life, 6th Edition
6th Edition
ISBN: 9780190259204
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 13, Problem 5Q
Summary Introduction

To review:

The role of the following during photosynthesis:

a. Plastocyanin

b. β-Carotene

c. Ferredoxin

d. Plastoquinone

e. Pheophytina

f. Lutein

Introduction:

Photosynthesis is the process of producing food in the form of sugar by green plants, cyanobacteri, and some Protists. It is a light-driven biochemical mechanism as it requiresenergy from sunlight to synthesize ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) in the form of energy. In this proces, sarbon dioxide is incorporated into organic molecule, glucose. This process takes place inside the photosystems (membrane-bound protein complex in chloroplast) in plants.

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An allosteric enzyme that follows the concerted model has an allosteric coefficient (T/R) of 300 in the absence of substrate. Suppose that a mutation reversed the ratio. Select the effects this mutation will have on the relationship between the rate of the reaction (V) and substrate concentration, [S]. ㅁㅁㅁ The enzyme would likely follow Michaelis-Menten kinetics. The plot of V versus [S] would be sigmoidal. The enzyme would mostly be in the T form. The plot of V versus [S] would be hyperbolic. The enzyme would be more active.
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Chapter 13 Solutions

Biochemistry, The Molecular Basis of Life, 6th Edition

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