Podcast
Questions and Answers
What are the end products of photosynthesis? (Select all that apply)
What are the end products of photosynthesis? (Select all that apply)
- Oxygen and carbohydrate (correct)
- Water and carbon dioxide
- Carbohydrate and water
- Water and oxygen
What organisms are capable of photosynthesis? (Select all that apply)
What organisms are capable of photosynthesis? (Select all that apply)
- Plants, algae, and some bacteria (correct)
- Plants and algae only
- Plants and some bacteria only
- Plants only
Which of these is NOT a major photosynthetic pigment in plants?
Which of these is NOT a major photosynthetic pigment in plants?
- Carotenoid pigments
- Chlorophyll a
- Chlorophyll c (correct)
- Chlorophyll b
_______ is a product of the Calvin Cycle that is used to form glucose phosphate, amino acids, or fatty acids.
_______ is a product of the Calvin Cycle that is used to form glucose phosphate, amino acids, or fatty acids.
The function of sunlight in photosynthesis is to:
The function of sunlight in photosynthesis is to:
G3P (glyceraldehyde 3 phosphate) is used by plants for all of the following EXCEPT the formation of
G3P (glyceraldehyde 3 phosphate) is used by plants for all of the following EXCEPT the formation of
The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.
The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.
Where do the carbon atoms in glucose come from?
Where do the carbon atoms in glucose come from?
Carbon dioxide and water can combine to form glucose, water, and oxygen. What is required for that process to occur?
Carbon dioxide and water can combine to form glucose, water, and oxygen. What is required for that process to occur?
Inside the chloroplast, where are organic molecules made?
Inside the chloroplast, where are organic molecules made?
The splitting of water and the generation of oxygen occur where?
The splitting of water and the generation of oxygen occur where?
In order to generate one glucose molecule, the Calvin cycle has to turn how many times?
In order to generate one glucose molecule, the Calvin cycle has to turn how many times?
At night, the Calvin cycle:
At night, the Calvin cycle:
In eukaryotes, photosynthesis takes place inside the ________.
In eukaryotes, photosynthesis takes place inside the ________.
Clusters of chlorophyll and accessory pigments are called ________.
Clusters of chlorophyll and accessory pigments are called ________.
In photosynthesis, carbon fixation occurs:
In photosynthesis, carbon fixation occurs:
Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the:
Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the:
Flattened sacs of internal membranes associated with photosynthesis are called:
Flattened sacs of internal membranes associated with photosynthesis are called:
For photosynthesis in green plants, the electron donor for the light-dependent reaction is:
For photosynthesis in green plants, the electron donor for the light-dependent reaction is:
Light consists of units of energy called
Light consists of units of energy called
Molecules that absorb light are called:
Molecules that absorb light are called:
In green plants, which photosystem absorbs photons to excite electrons in the reaction center?
In green plants, which photosystem absorbs photons to excite electrons in the reaction center?
The light-independent reactions of photosynthesis are those that:
The light-independent reactions of photosynthesis are those that:
The cyclic carbon fixation reactions are also known as the:
The cyclic carbon fixation reactions are also known as the:
In which part of the chloroplasts are the Calvin cycle enzymes located?
In which part of the chloroplasts are the Calvin cycle enzymes located?
What products of light reactions of photosynthesis are used in the Calvin cycle?
What products of light reactions of photosynthesis are used in the Calvin cycle?
Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?
Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?
Carotenoids are important to many plants because these pigments are able to:
Carotenoids are important to many plants because these pigments are able to:
What color of light is not strongly absorbed by chlorophyll?
What color of light is not strongly absorbed by chlorophyll?
In photosynthesis, ATP is made by
In photosynthesis, ATP is made by
Study Notes
Photosynthesis Overview
- Photosynthesis produces oxygen and carbohydrates, vital for sustaining life on Earth.
- Organisms capable of photosynthesis include plants, algae, and some bacteria.
Photosynthetic Pigments
- Major pigments: chlorophyll a and b, carotenoids.
- Chlorophyll c is not a primary pigment in plants.
- Carotenoids absorb wavelengths of light not captured by chlorophyll a and b.
Light Reactions
- Light energy from the sun excites electrons in chlorophyll, contributing to the energy conversion necessary for photosynthesis.
- Water is the electron donor in light-dependent reactions.
- Oxygen is generated from the splitting of water during the light-dependent reactions.
Calvin Cycle
- Glyceraldehyde-3-phosphate (G3P) is produced in the Calvin Cycle and is used for forming glucose, amino acids, and fatty acids, but not oxygen.
- The Calvin Cycle requires six turns to generate one glucose molecule.
- It can occur at night as long as ATP, carbon dioxide, and NADPH are available.
Chloroplast Structure
- Photosynthesis occurs in chloroplasts, specifically within the stroma where organic molecules are synthesized.
- Thylakoids are flattened membrane sacs where light reactions take place.
Carbon Fixation and Sugar Production
- Carbon dioxide is incorporated into sugars through the Calvin Cycle.
- Light energy from the sun is essential for the conversion of carbon dioxide and water into glucose and oxygen.
Energy and Chemical Processes
- ATP and NADPH produced in the light reactions drive the Calvin Cycle.
- Chemiosmosis is the process that generates ATP during photosynthesis.
Spectral Absorption
- Chlorophyll does not effectively absorb green light, which is why plants appear green.
- Light energy consists of photons, which are harnessed by pigments for photosynthesis.
Photosystems
- Photosystem I and II work together to absorb light and facilitate the light-dependent reactions.
- The light-independent reactions convert carbon dioxide into sugars, essential for plant metabolism.
Importance of Photosynthesis
- Most atmospheric oxygen is produced from water during photosynthesis.
- Oxygen released is derived from the photolysis of water in the light-dependent reactions.
Studying That Suits You
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Description
Test your knowledge on photosynthesis with these flashcards from Chapter 7. This quiz covers key concepts such as the products of photosynthesis and the organisms involved in the process. Perfect for students looking to reinforce their understanding of plant biology!
