Biochemistry
Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 19, Problem 1P
Interpretation Introduction

Interpretation:

The component that does not belong to the chloroplast should be chosen.

Concept introduction:

Chloroplasts produce food for the plants by conversion of the light energy to sugars which can be utilized by the plants. There are two membranes that contain and protect the inner parts of chloroplast, the inner and the outer membrane.

Expert Solution & Answer
Check Mark

Answer to Problem 1P

The correct answer is option (c) Cristae.

Explanation of Solution

Reason for the correct answer:

Option (c) Cristae. It is a fold in the inner membrane of a mitochondrion. The name is from the Latin for crest or plume, and it gives the inner membrane its characteristic wrinkled shape, providing a large amount of surface area for chemical reactions to occur.

Conclusion

Reason for incorrect answer:

Option (a) Thylakoid membrane: The thylakoid system is suspended in the stroma. The thylakoid system is a collection of membranous sacks called thylakoids. The chlorophyll is found in the thylakoids and is the sight for the process of light reactions of photosynthesis to happen. So, this is an incorrect option.

Option (b) Stromal lamellae: The inner membrane of the chloroplast forms a border to the stroma. It regulates passage of materials in and out of the chloroplast. In addition of regulation activity, the fatty acids, lipids and carotenoids are synthesized in the inner chloroplast membrane. So, this is an incorrect option.

Option (d) Granum: The thylakoids are arranged in stacks known as granum. Each granum contains around 10-20 thylakoids. So, this is an incorrect option.

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Photosyntheis related question (s): When protons move out of the thylakoid, are they moving up or down their concentration gradient? (From low to high concentration or from high to low concentration?)    What protein(s) facilitate the transport of protons out of the thylakoid?   We can write the formula for photosynthesis as follows: 6 H2O + 6 CO2 + light energy → C6H12O6 + 6 O2 How would you write a formula for the light reactions? Include ATP, ADP, NADP and NADPH as relevant? How would you write a formula for the Calvin cycle? Include ATP, ADP, NADP and NADPH as relevant.
Photosynthesis Purpose? Why does a plant need water? Why does a plant need CO2 Why does a plant produce O2?
chlorophyll-What wavelengths of light does it absorb?
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