Ch 4: Importance of photosynthesis

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Questions and Answers

What is one of the paramount contributions of photosynthesis mentioned in the text?

  • Decreasing oxygen levels
  • Maintaining balance of atmospheric gases (correct)
  • Producing water
  • Reducing vegetation

What do green plants and photosynthetic organisms mainly convert atmospheric carbon dioxide (CO2) into?

  • Glucose (correct)
  • Water
  • Carbon monoxide
  • Oxygen

What is released as a byproduct during the process of photosynthesis?

  • Carbon monoxide
  • Methane
  • Nitrogen
  • Oxygen (correct)

Which essential resource for aerobic respiration is released into the atmosphere during photosynthesis?

<p>Oxygen (B)</p> Signup and view all the answers

What role does the oxygen released during photosynthesis play in sustaining ecosystems?

<p>Sustains aerobic respiration in organisms (C)</p> Signup and view all the answers

What does photosynthesis serve as the primary source of in the atmosphere?

<p>Oxygen (O2) (B)</p> Signup and view all the answers

How does photosynthesis help in mitigating the potential role of carbon dioxide (CO2) in climate change?

<p>By converting CO2 into organic compounds like glucose (A)</p> Signup and view all the answers

What is a key role of photosynthesis in shaping the Earth's atmosphere as mentioned in the text?

<p>Maintaining balance of atmospheric gases (D)</p> Signup and view all the answers

What is oxygen released during photosynthesis used for?

<p>For aerobic respiration in organisms (B)</p> Signup and view all the answers

What is the primary purpose of photosynthesis in sustaining life on Earth?

<p>Producing glucose as a source of chemical energy (C)</p> Signup and view all the answers

Which process would be disrupted if photosynthesis were to cease?

<p>Cellular respiration (A)</p> Signup and view all the answers

What is the role of chlorophyll pigments in photosynthesis?

<p>Convert solar energy into chemical energy (A)</p> Signup and view all the answers

Besides glucose production, what other critical function does photosynthesis serve?

<p>Synthesizing vital organic molecules for cellular activities (A)</p> Signup and view all the answers

What purpose does stored glucose in the form of starch serve for plants?

<p>Serving as an energy reservoir for growth and survival (D)</p> Signup and view all the answers

Which part of plants is primarily responsible for the conversion of radiant energy in photosynthesis?

<p>Chloroplasts (B)</p> Signup and view all the answers

What trophic level primarily benefits from photosynthesis in the ecosystem?

<p>Primary consumers (C)</p> Signup and view all the answers

Which statement best describes the relationship between photosynthesis and cellular metabolism?

<p>Photosynthesis breaks down glucose in cellular respiration (B)</p> Signup and view all the answers

What is the function of organic compounds synthesized through photosynthesis?

<p>Providing structural components for cells (D)</p> Signup and view all the answers

What is the pivotal role of photosynthesis in shaping the Earth's atmosphere?

<p>Maintaining balance of atmospheric gases such as CO2 and O2 (C)</p> Signup and view all the answers

Which crucial function does the oxygen released during photosynthesis serve?

<p>Fueling aerobic respiration in organisms (B)</p> Signup and view all the answers

What primary role does photosynthesis play in sustaining terrestrial and aquatic ecosystems?

<p>Regulating CO2 levels and providing oxygen for respiration (D)</p> Signup and view all the answers

How does photosynthesis contribute to maintaining the delicate balance of atmospheric gases?

<p>By absorbing excess CO2 and producing oxygen (A)</p> Signup and view all the answers

In what way does photosynthesis impact climate change and global warming?

<p>Mitigating CO2 levels that contribute to climate change (B)</p> Signup and view all the answers

What is a significant environmental implication of photosynthesis?

<p>Supporting diverse ecosystems through oxygen production (D)</p> Signup and view all the answers

Which statement accurately describes the relationship between photosynthesis and aerobic respiration?

<p>Photosynthesis provides glucose for respiration and oxygen produced (D)</p> Signup and view all the answers

How does photosynthesis directly contribute to the survival of various organisms?

<p>By generating oxygen for cellular respiration (C)</p> Signup and view all the answers

What is one primary ecological implication of oxygen production through photosynthesis?

<p>Sustaining aerobic life and ecosystems (B)</p> Signup and view all the answers

What is the ultimate outcome of the conversion of radiant energy in photosynthesis?

<p>Synthesis of glucose (B)</p> Signup and view all the answers

What serves as the primary fuel for metabolic processes in plants?

<p>Glucose (A)</p> Signup and view all the answers

What is a critical function of photosynthesis in relation to cellular structures?

<p>Building proteins (D)</p> Signup and view all the answers

Which of the following would be severely impacted if stored glucose in the form of starch was unavailable for plants?

<p>Survival during scarcity (C)</p> Signup and view all the answers

What is the main function of the chlorophyll pigments in photosynthesis?

<p>Absorb solar radiation (A)</p> Signup and view all the answers

Which organism would be most directly impacted if carbon dioxide assimilation through photosynthesis ceased?

<p>Plants (B)</p> Signup and view all the answers

What would likely occur in the ecosystem if the conversion of radiant energy in photosynthesis was disrupted?

<p>Decline in glucose synthesis (A)</p> Signup and view all the answers

If photosynthesis played no role in the synthesis of organic compounds, which cellular function would be most affected?

<p>Genetic material synthesis (B)</p> Signup and view all the answers

What would be the immediate impact on organisms across trophic levels if photosynthesis no longer served as the foundation of the food web?

<p>Depletion of energy sources (A)</p> Signup and view all the answers

What is not a significant environmental implication of photosynthesis?

<p>Promoting anaerobic growth (B)</p> Signup and view all the answers

How does photosynthesis primarily contribute to the shaping of the Earth's atmosphere?

<p>Maintaining balance between CO2 and O2 (A)</p> Signup and view all the answers

In the context of oxygen production by photosynthesis, what common misconception should be avoided?

<p>Photosynthesis primarily reduces oxygen levels (D)</p> Signup and view all the answers

If photosynthesis ceases, which group of organisms would be most directly impacted?

<p>Plants (C)</p> Signup and view all the answers

What is not an immediate outcome if the conversion of radiant energy in photosynthesis is disrupted?

<p>Increased glucose synthesis (B)</p> Signup and view all the answers

What is a critical function of stored glucose in the form of starch for plants?

<p>Providing immediate energy (D)</p> Signup and view all the answers

Which trophic level primarily benefits from photosynthesis in the ecosystem?

<p>Producers (B)</p> Signup and view all the answers

What is a direct impact of photosynthesis on ecosystems?

<p>Supporting food chains (A)</p> Signup and view all the answers

How does oxygen released during photosynthesis contribute to ecosystem sustainability?

<p>Supporting aerobic respiration (D)</p> Signup and view all the answers

What is the primary function of stored glucose in the form of starch for plants?

<p>Facilitates growth, survival during scarcity, and reproductive success (C)</p> Signup and view all the answers

What is the pivotal role of chlorophyll pigments in photosynthesis?

<p>Absorbing solar radiation to initiate biochemical reactions (B)</p> Signup and view all the answers

Which trophic level benefits the most from the synthesis of organic compounds in photosynthesis?

<p>Primary consumers (C)</p> Signup and view all the answers

What is the essential product of the assimilation of atmospheric carbon dioxide by plants?

<p>Glucose (B)</p> Signup and view all the answers

How does photosynthesis contribute to ecological balance?

<p>By supporting the growth and reproduction of organisms (A)</p> Signup and view all the answers

What is the ultimate source of chemical energy for metabolic processes in plants?

<p>Glucose (D)</p> Signup and view all the answers

Which process would be severely hindered if radiant energy conversion in photosynthesis was impaired?

<p>Production of organic molecules (A)</p> Signup and view all the answers

What happens to the oxygen released during photosynthesis?

<p>It fuels cellular respiration in plants (B)</p> Signup and view all the answers

In the context of photosynthesis, why are proteins, lipids, and nucleic acids important?

<p>As essential organic compounds for cellular functions (A)</p> Signup and view all the answers

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