Photosynthesis Concepts Quiz

Questions and Answers

What is the photosynthetic equation?

C6H12O6 --> 6H2O + 6CO2 + 6O2

C6H12O6 + 6O2 --> 6H2O + 6CO2

6H2O + 6CO2 --> C6H12O6 + 6O2 (correct)

6H2O + 6O2 --> C6H12O6 + 6CO2

Where does photosynthesis occur?

Chloroplast

What are the reactants of photosynthesis?

6H2O + 6CO2

What are the products of photosynthesis?

C6H12O6 + 6O2 Signup and view all the answers

Photosynthetic pigments absorb light energy.

True Signup and view all the answers

What are the two reactions of photosynthesis?

Both A and B Signup and view all the answers

What is required for the Light Dependent Reaction?

Light, Water, NADP+, ADP Signup and view all the answers

What is ATP?

Main energy source that cells use for most of their work Signup and view all the answers

What are the products of the Light Dependent Reaction?

ATP, NADPH, O2 Signup and view all the answers

Where do Light Dependent Reactions occur?

Thylakoid Membrane Signup and view all the answers

What is NADPH?

An electron carrier involved in photosynthesis. Signup and view all the answers

What is the Calvin Cycle?

The process that turns CO2, ATP, and NADPH into glucose. Signup and view all the answers

What are the parts of an ATP molecule?

Adenine, Ribose, Phosphate Signup and view all the answers

Chlorophyll reflects green light.

True Signup and view all the answers

What happens when a phosphate group is removed from ATP?

Energy is released. Signup and view all the answers

What does autotrophic mean?

An organism capable of synthesizing its own food. Signup and view all the answers

What is the role of chloroplasts?

Organelle that absorbs sunlight for photosynthesis. Signup and view all the answers

What is photosynthesis?

The process that converts light energy into chemical energy. Signup and view all the answers

What are heterotrophs?

Organisms that obtain food by consuming others. Signup and view all the answers

What is stroma?

The fluid surrounding the thylakoid membrane in chloroplasts. Signup and view all the answers

What are thylakoids?

Flattened sac-like membranes inside chloroplasts. Signup and view all the answers

What is chlorophyll?

A green pigment located in chloroplasts. Signup and view all the answers

What is the Light Dependent Reaction?

The first major stage in photosynthesis that converts solar energy to ATP and NADPH. Signup and view all the answers

What is the Light Independent Reaction?

The second major stage in photosynthesis involving fixation of CO2. Signup and view all the answers

What is the balanced equation for photosynthesis?

6CO2 + 6H2O → C6H12O6 + 6O2 Signup and view all the answers

What does H2O provide in photosynthesis?

H+ ions and electrons. Signup and view all the answers

What is CO2's role in photosynthesis?

A reactant of the Light Independent Reaction. Signup and view all the answers

What is a pigment?

A light absorbing molecule. Signup and view all the answers

What is ADP?

Adenosine diphosphate, remains when a phosphate group is removed from ATP. Signup and view all the answers

What is O2 in the context of photosynthesis?

Byproduct of the Light Dependent Reaction. Signup and view all the answers

What is the outer chloroplast membrane?

Outer covering of the organelle. Signup and view all the answers

What is granum?

A stack of thylakoids. Signup and view all the answers

Study Notes

Photosynthetic Equation

Photosynthesis follows the equation: 6H2O + 6CO2 → C6H12O6 + 6O2, indicating the conversion of water and carbon dioxide into glucose and oxygen.

Location of Photosynthesis

Occurs in chloroplasts, specialized organelles found in plant cells.

Reactants of Photosynthesis

Requires 6 water molecules (H2O) and 6 carbon dioxide molecules (CO2).

Products of Photosynthesis

Yields 1 glucose molecule (C6H12O6) and 6 oxygen molecules (O2).

Photosynthetic Pigments

Chemicals in chloroplast thylakoid membranes that absorb light energy; examples include chlorophyll a, chlorophyll b, and carotenoids.

Reactions of Photosynthesis

Comprises two main processes: Light Dependent Reaction (LDR) and Light Independent Reaction (Calvin Cycle).

Requirements for Light Dependent Reaction

Needs light, water, NADP+, and ADP to occur.

ATP (Adenosine Triphosphate)

Primary energy source for cellular activities; produced during photosynthesis.

Products of Light Dependent Reaction

Produces ATP (from ADP), NADPH (from NADP+), and O2 as byproduct.

Location of Light Dependent Reaction

Takes place in the thylakoid membrane of chloroplasts.

NADPH

An electron carrier formed during light reactions; crucial for reducing carbon dioxide in the Calvin Cycle.

Calvin Cycle

Converts carbon dioxide, ATP, and NADPH into glucose, ADP, and NADP+; also referred to as the Light Independent Reaction.

Parts of an ATP Molecule

Consists of adenine, ribose, and phosphate groups.

Chlorophyll's Color

Chlorophyll reflects green light, giving plants their green appearance.

ATP Energy Release

Energy is released when a phosphate group is removed from ATP, converting it to ADP.

Autotrophic Organisms

Capable of synthesizing their own food from inorganic substances using light or chemical energy (e.g., green plants, algae).

Chloroplast Function

Absorbs sunlight and converts it into chemical energy stored as glucose from carbon dioxide and water.

Definition of Photosynthesis

Process that transforms light energy into chemical energy stored in glucose; occurs in plants, algae, and select prokaryotes.

Heterotrophs

Organisms that obtain organic food by consuming other organisms or their derivatives.

Stroma

The fluid surrounding the thylakoids within chloroplasts, where the Light Independent Reactions occur.

Thylakoids

Membranous structures within chloroplasts that contain the components for converting light energy into chemical energy; organized into stacks called grana.

Chlorophyll

Green pigment found in chloroplast membranes of plants, algae, and certain prokaryotes, essential for capturing light energy.

Light Dependent Reaction

Initial stage of photosynthesis occurring in thylakoid membranes; converts solar energy into ATP and NADPH while releasing oxygen.

Light Independent Reaction

Second stage of photosynthesis; involves the fixation of CO2 and its reduction into carbohydrates.

Balanced Photosynthesis Equation

Represents photosynthesis as: 6CO2 + 6H2O → C6H12O6 + 6O2.

Water Role in Photosynthesis

Provides H+ ions and electrons required for NADP+ formation; the oxygen produced during photosynthesis originates from water molecules.

Carbon Dioxide Role

A reactant for the Light Independent Reaction, essential for plant photosynthesis.

Light Absorbing Molecule

Pigments, such as those in plants, that capture light energy necessary for photosynthesis.

ADP (Adenosine Diphosphate)

Formed when a phosphate group is removed from ATP, with potential energy that can be converted back to ATP.

Oxygen Production

Byproduct of the Light Dependent Reactions during photosynthesis.

Outer Chloroplast Membrane

Protective outer covering of chloroplasts.

Granum

A stack of thylakoids within the chloroplast, enhancing the efficiency of light absorption.

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Description

Test your knowledge on the essential concepts of photosynthesis with this quiz. From the photosynthetic equation to the role of chloroplasts, explore key terms and their definitions. Perfect for biology students studying plant processes.