BIOLOGY 12TH ED (LL) W/ CONNECT
BIOLOGY 12TH ED (LL) W/ CONNECT
12th Edition
ISBN: 9781264898091
Author: Raven
Publisher: MCG
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Chapter 8, Problem 1DA
Summary Introduction

To suggest:  A hypothesis that would explainthe given observation.

Introduction: The plant is a multicellular organism in the kingdom Plantae. It uses photosynthesis to make its own food. Photosynthesis is a process by which green plants and certain other organisms transform light energy into chemical energy. The process of photosynthesis takes place in two sequential stages, which include light-dependent reactions and light-independent reactions.

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Blackman measured photosynthesis rates under differing intensities of light, carbon dioxide, and temperatures. Blackman found that increasing light intensity above 2000 foot-candles does not lead to any further increase in the rate of photosynthesis.

The light energy is used to generate adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate hydrogen (NADPH) that can then be used to reduce carbon dioxide. The chlorophyll molecules absorb the photons of light energy. Thus, increasing light intensity increase photosynthesis, but it will saturate when all chlorophyll molecules are in use.

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When discussing why the rate of photosynthesis did not increase at higher light intensities, the investigator mentioned the possibility that high light intensities could damage chlorophyll, which would result in a decrease in oxygen production. Which of the following accurately explains the role of chlorophyll in oxygen production during photosynthesis and why damage to chlorophyll would results in lower oxygen production? Select one or more: a. Chlorophyll participates in carbon fixation during the Calvin Cycle.  During this process, oxygen molecules are formed. b. Chlorophyll captures energy from sunlight and releases high energy electrons that enter the electron transport chain in the Calvin Cycle.  During this process, oxygen molecules are formed. c. Chlorophyll participates in carbon fixation during the light reactions.  During this process, oxygen molecules are formed. d. Chlorophyll captures energy from sunlight and releases high energy electrons that enter the electron…
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