BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 8.2, Problem 2CC
Summary Introduction
To determine: The events by which the photoexcited electron becomes stable.
Introduction: The
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(g) The figure given below represents an
experiment to demonstrate a particular
aspect of photosynthesis. The alphabet 'A'
represents a certain condition inside the
flask.
2
КОН
(i) What is the aim of the experiment ?
(ii) Identify the special condition inside the
flask.
(iii) Name an alternative chemical that can be
used instead of KOH.
(iv) In what manner do the leaves 1 and 2
differ at the end of the starch test ?
Photosynthesis is defined as the chemical process, wherein carbon dioxide in the presence of water and radiant energy gets converted to glucose (chemical energy), giving out oxygen as byproducts. In the equation, the combining reactants and resulting products are expressed along with their respective numbers of molecules. Putting this in a simplified formula, the following equation represents this process.
CO2 + H2O + Light energy → C6H12O6 + O2
Considering this equation, how plant lovers (plantitos and plantitas) able to cultivate their plants?
If a photosynthetic organism is illuminated in a closed, sealed environment,
it is observed that the CO, and O, levels in the surrounding atmosphere
reach a constant ratio.
(a) Suggest an explanation.
(b) What factor would you think primarily determines the value of this
ratio?
Chapter 8 Solutions
BIOLOGY
Ch. 8.1 - Core Skill: Modeling The goal of this modeling...Ch. 8.1 - Prob. 2CSCh. 8.1 - Can the Calvin cycle occur in the dark?Ch. 8.2 - Prob. 1CCCh. 8.2 - Prob. 2CCCh. 8.2 - Prob. 3CCCh. 8.2 - Prob. 4CCCh. 8.2 - Why does cyclic photophosphorylation provide an...Ch. 8.2 - Prob. 6CCCh. 8.3 - Prob. 1CC
Ch. 8.4 - Prob. 1CCCh. 8.4 - Prob. 1EQCh. 8.4 - Prob. 2EQCh. 8.4 - Prob. 3EQCh. 8.5 - Prob. 1CCCh. 8.5 - Prob. 2CCCh. 8 - The water necessary for photosynthesis a. is split...Ch. 8 - In PSII, P68o differs from the pigment molecules...Ch. 8 - Prob. 3TYCh. 8 - Prob. 4TYCh. 8 - Prob. 5TYCh. 8 - Prob. 6TYCh. 8 - Prob. 7TYCh. 8 - Prob. 8TYCh. 8 - Prob. 9TYCh. 8 - Prob. 10TYCh. 8 - Prob. 1CQCh. 8 - Prob. 2CQCh. 8 - Prob. 3CQCh. 8 - Discuss the advantages and disadvantages of being...Ch. 8 - Biotechnologists are trying to genetically modify...
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- Given an equal amount of photons, what is the order of increasing effectiveness of blue, red, green, and white light (combination of the three main wavelengths) on photosynthetic activity?arrow_forward(a) Distinguish between photodissociation and photoionization.(b) Use the energy requirements of these two processesto explain why photodissociation of oxygen is moreimportant than photoionization of oxygen at altitudesbelow about 90 km.arrow_forwardThe law of conservation of matter states that no matter on earth can be created or destroyed. Using the following equation: 6H2O + 6CO2 + Sunlight—> C6H12O6 + 6O2, explain how the process of photosynthesis is an example of this.arrow_forward
- List four products of the light reactions.arrow_forward1. A) For the schematic of a chloroplast shown in the image attached, match the major input and output molecules of photosynthesis to the letters shown. Molecules: CO2, H2O, O2, sugar A: B: C: D: B) In the image attached, the light reactions are shown to take place in the thylakoid. Where specifically do these reactions take place? C) Where does the Calvin cycle take place?arrow_forwardWhat fraction of the energy of 700-nm light absorbed by photosystem I is trapped as high-energy electrons?arrow_forward
- What fraction of the energy of 700- nm light absorbed by photosystem I is trapped as highenergy electrons?arrow_forwardTo assess photosynthesis, we relied heavily on a spectrophotometer to measure the color intensity of DCPIP in our solution. We set the spectrophotometer at wavelengths in the visible spectrum. What is the approximate wavelength range (in nm) for the visible spectrum? For example, the ultraviolet spectrum wavelength range is approximately 10-400 nmarrow_forward1) If we put a photosynthetic organism in a closed, sealed environment and shine a light on it, we observe that the CO2 and O2 levels in the container reach constant levels. a) Explain why this would occur. b) What factor/value would you expect to be the primary determinant of this value?arrow_forward
- Shown below are absorption spectra for four pigment molecules. Which of these pigments are responsible for giving carrots their orange color? A) A B) B C) C D) Darrow_forwardThe photosynthetic process, used by the chloroplasts of green plants and green algae, is best represented by which of the following balanced equations? C6H12O6 + 6O2 + 6H2O g 6CO2 + 12H2O C6H12O6 + C6H12O6 g C12H22O11 + H2O 6CO2 + 12H2O g C6H12O6 + 6O2 + 6H2O C12H22O11 + H2O g C6H12O6 + C6H12O6 6CO2 + 12H2S g C6H12O6 + 6S2 + 6H2Oarrow_forwardFirefly luciferase is the enzyme that allows fireflies to illuminate their abdomens. Because this light generation is an ATP-requiring reaction, firefly luciferase can be used to test for the presence of ATP. In this way, luciferase can test for the presence of life. The coupled reactions are luciferin+O2 ⇌ oxyluciferin+light ATP ⇌ AMP+PPi, ΔGo=−31.6 kJ/mol If the overall ΔGo of the coupled reaction is -8.70 kJ/mol, what is the equilibrium constant, K, of the first reaction at 27oC?arrow_forward
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