Photosynthesis Process
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Questions and Answers

What is the primary function of pigments in the thylakoid membrane during photosynthesis?

  • To absorb light energy and generate ATP and NADPH (correct)
  • To synthesize proteins
  • To release oxygen as a byproduct
  • To convert CO2 into glucose

Which type of nutrition is characteristic of organisms that produce their own food through photosynthesis?

  • Heterotrophic nutrition
  • Saprotrophic nutrition
  • Autotrophic nutrition (correct)
  • Parasitic nutrition

What is the primary source of energy for heterotrophic organisms?

  • Chemical energy from other organisms (correct)
  • Kinetic energy from movement
  • Thermal energy from the environment
  • Light energy from the sun

During which stage of photosynthesis is CO2 converted into glucose?

<p>Light-independent reactions (D)</p> Signup and view all the answers

What is the byproduct of photosynthesis that is essential for aerobic respiration?

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

Which mode of nutrition involves the breakdown of dead organic matter?

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

What is the overall equation for photosynthesis?

<p>6 CO2 + 12 H2O + light energy → C6H12O6 + 6 O2 + 6 H2O (A)</p> Signup and view all the answers

Which type of organism obtains energy and nutrients by consuming other organisms or organic matter?

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

What is the product of photosynthesis that is used by heterotrophic organisms for energy and organic compounds?

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

Study Notes

Photosynthesis

Definition

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy from the sun into chemical energy in the form of glucose.

Overall Equation

6 CO2 + 6 H2O + light energy → C6H12O6 (glucose) + 6 O2

Importance

Photosynthesis is essential for life on Earth, providing:

  • Oxygen for aerobic respiration
  • Glucose for energy and organic compounds
  • Food for heterotrophic organisms

Steps

  1. Light-dependent reactions: Light energy is absorbed by pigments (chlorophyll, others) in the thylakoid membrane, generating ATP and NADPH.
  2. Light-independent reactions (Calvin cycle): ATP and NADPH are used to convert CO2 into glucose.

Nutrition

Definition

Nutrition is the process by which organisms obtain energy and nutrients from their environment.

Types of Nutrition

  1. Autotrophic nutrition: Organisms produce their own food through photosynthesis (plants, algae).
  2. Heterotrophic nutrition: Organisms obtain energy and nutrients by consuming other organisms or organic matter (animals, fungi, bacteria).

Modes of Nutrition

  1. Holozoic nutrition: Organisms ingest solid or liquid food particles (animals).
  2. Saprotrophic nutrition: Organisms obtain nutrients by breaking down dead organic matter (fungi, bacteria).
  3. Parasitic nutrition: Organisms obtain nutrients from another living organism (parasites).

Importance

Nutrition is essential for:

  • Energy production
  • Growth and development
  • Maintenance of cellular processes

Photosynthesis

  • Converts light energy from the sun into chemical energy in the form of glucose
  • Occurs in green plants, algae, and some bacteria
  • Overall equation: 6 CO2 + 6 H2O + light energy → C6H12O6 (glucose) + 6 O2
  • Essential for life on Earth, providing oxygen for aerobic respiration, glucose for energy and organic compounds, and food for heterotrophic organisms

Steps of Photosynthesis

  • Light-dependent reactions: Light energy is absorbed by pigments (chlorophyll, others) in the thylakoid membrane, generating ATP and NADPH
  • Light-independent reactions (Calvin cycle): ATP and NADPH are used to convert CO2 into glucose

Nutrition

  • Process by which organisms obtain energy and nutrients from their environment
  • Types:
    • Autotrophic nutrition: Organisms produce their own food through photosynthesis (plants, algae)
    • Heterotrophic nutrition: Organisms obtain energy and nutrients by consuming other organisms or organic matter (animals, fungi, bacteria)

Modes of Nutrition

  • Holozoic nutrition: Organisms ingest solid or liquid food particles (animals)
  • Saprotrophic nutrition: Organisms obtain nutrients by breaking down dead organic matter (fungi, bacteria)
  • Parasitic nutrition: Organisms obtain nutrients from another living organism (parasites)

Importance of Nutrition

  • Essential for energy production, growth and development, and maintenance of cellular processes

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Description

Explore the process of photosynthesis, where plants convert light energy into chemical energy, and learn about its importance in supporting life on Earth.

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