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Questions and Answers
Heterotrophs can synthesize their own food through photosynthesis.
Heterotrophs can synthesize their own food through photosynthesis.
False (B)
Photosynthesis involves the conversion of inorganic compounds into organic compounds using sunlight.
Photosynthesis involves the conversion of inorganic compounds into organic compounds using sunlight.
True (A)
The light-independent reactions of photosynthesis occur in the thylakoid membrane of chloroplasts.
The light-independent reactions of photosynthesis occur in the thylakoid membrane of chloroplasts.
False (B)
Carotenoids are primarily responsible for absorbing water during photosynthesis.
Carotenoids are primarily responsible for absorbing water during photosynthesis.
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During the light-dependent reactions, water is split into oxygen, protons (H+), and electrons, which are essential for creating energy compounds like ATP and NADPH.
During the light-dependent reactions, water is split into oxygen, protons (H+), and electrons, which are essential for creating energy compounds like ATP and NADPH.
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Study Notes
Biology 8 Overview
- The theme for this course emphasizes the 5 C's: competence, character, commitment, collaboration, and creativity
- Students will develop these through academic rigor, a growth mindset, and grit
Unit 2: Life Processes of Living Things - Photosynthesis
- Photosynthesis is a Greek word meaning "putting together with light"
- Involves plants, algae, and some bacteria using sunlight to create organic compounds (sugars) from inorganic compounds (carbon dioxide and water)
- It's a vital biological process that provides oxygen and consumes carbon dioxide
Modes of Nutrition
- Autotrophs: These organisms like green plants produce their own food through photosynthesis
- Heterotrophs: These organisms like animals depend on autotrophs for their food
- Saprotrophs: These organisms like decomposers obtain their nutrients by breaking down dead organic matter
Photosynthesis
- The general formula for photosynthesis is 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O
- This process involves the use of light energy and pigments like chlorophyll and carotenoids to convert carbon dioxide and water into sugar
- Accessory pigments extend the absorption range and protect cells
Chloroplasts
- Chloroplasts are the organelles in plants where photosynthesis occurs
- Sunlight is absorbed and used with water and carbon dioxide to create food
Light Reaction
- Light-dependent reactions take place in the thylakoid membranes
- Water is broken down into oxygen, releasing hydrogen ions (H+)
- Energy from sunlight is used to make ATP and NADPH
- Essential for the next stage
Dark Reaction (Calvin Cycle)
- Light-independent, also known as the Calvin cycle, occurring in the stroma
- ATP and NADPH created in the light reactions provide the chemical energy needed to convert CO2 into carbohydrates
- Thus, crucial for creating sugar for the plant's growth
Respiration, Energy, and Carbon Cycle
- Respiration is the process of extracting energy from organic compounds, like sugars, by breaking them down
- The general formula for respiration is C6H12O6 + O2 → 6CO2 + ATP
- Energy flows in a linear fashion through the ecosystem
- Carbon cycles between the atmosphere, plants, and animals, driven by processes like respiration and combustion
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Description
This quiz covers the essential processes of photosynthesis, exploring how autotrophs, heterotrophs, and saprotrophs interact within ecosystems. Learn about the importance of photosynthesis, including its role in oxygen production and carbon dioxide consumption. Prepare to demonstrate your understanding of life processes in this engaging quiz.
