Questions and Answers
Why are plants classified as producers?
Plants are classified as producers because they fix inorganic carbon into organic molecules.
Which of the following statements about the relationship between photosynthesis and cellular respiration is correct?
Which of the following events occurs in the light reactions of photosynthesis?
Which of the following molecules are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
Signup and view all the answers
Which of the following statements correctly summarizes a redox reaction that occurs in photosynthesis?
Signup and view all the answers
In photosynthetic cells, which reactions are responsible for the synthesis of ATP by chemiosmosis?
Signup and view all the answers
Where is the electron transport chain associated with photophosphorylation located in plant cells?
Signup and view all the answers
In mitochondria, the electron transport chain pumps protons from the matrix into the intermembrane space. In what direction are protons pumped by the electron transport chain in chloroplasts?
Signup and view all the answers
In chemiosmosis in mitochondria, protons flow from the intermembrane space into the matrix. In what direction do protons flow during chemiosmosis in chloroplasts?
Signup and view all the answers
Which of the following statements correctly describes an activity directly associated with photosystem I?
Signup and view all the answers
Which of the following statements correctly describes a reaction associated with photosystem II?
Signup and view all the answers
What is the basic role of CO2 in photosynthesis?
Signup and view all the answers
Select the correct statement about the Calvin cycle.
Signup and view all the answers
Select the correct molecule that is the main product of the Calvin cycle.
Signup and view all the answers
Where does the Calvin cycle take place?
Signup and view all the answers
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
Signup and view all the answers
Which of the following reactions produces the oxygen released by photosynthesis?
Signup and view all the answers
Select the most accurate statement describing the basic function of the light reactions of photosynthesis.
Signup and view all the answers
Which of the following metabolic processes consume(s) CO2?
Signup and view all the answers
Study Notes
Plants as Producers
- Plants convert inorganic carbon into organic molecules, classifying them as producers.
Photosynthesis vs Cellular Respiration
- Photosynthesis is an anabolic process that builds molecules, while cellular respiration is catabolic, breaking down molecules.
Light Reactions of Photosynthesis
- Light absorption occurs, transferring energy to reaction-center chlorophyll during the light reactions.
- Key products of light reactions, ATP and NADPH, are utilized in the subsequent Calvin cycle.
Redox Reactions in Photosynthesis
- In photosynthesis, carbon dioxide (CO2) is reduced to form glucose.
ATP Synthesis
- ATP synthesis via chemiosmosis occurs in both photosynthesis and cellular respiration processes.
Electron Transport Chain Location
- In plant cells, the electron transport chain related to photophosphorylation is found in the thylakoid membranes of the chloroplasts.
Proton Pumping Direction
- In chloroplasts, protons are pumped from the stroma to the thylakoid space, contrasting with mitochondria where protons are pumped into the intermembrane space.
Chemiosmosis Proton Flow
- During chemiosmosis in chloroplasts, protons flow from the thylakoid space into the stroma.
Photosystem I
- Photosystem I functions by receiving electrons from the electron transport chain associated with the thylakoid membranes.
Photosystem II Function
- In photosystem II, electrons released from P680 chlorophyll are replaced by those derived from water, enabling continuous photosynthesis.
Role of CO2
- Carbon dioxide’s primary role in photosynthesis is to get fixed and incorporated into organic molecules.
Calvin Cycle Phases
- The Calvin cycle consists of three phases: carbon fixation, reduction, and regeneration of RuBP (ribulose bisphosphate).
Main Product of the Calvin Cycle
- The principal product generated in the Calvin cycle is G3P (glyceraldehyde-3-phosphate).
Location of the Calvin Cycle
- The Calvin cycle occurs in the stroma of chloroplasts.
Relationship Between Light Reactions and Calvin Cycle
- Light reactions supply ATP and NADPH to the Calvin cycle, while products from the Calvin cycle, ADP, Pi, and NADP+, are returned to the light reactions.
Oxygen Production in Photosynthesis
- Oxygen released during photosynthesis originates from the splitting of water molecules.
Function of Light Reactions
- The light reactions convert solar energy into chemical energy, setting the stage for the anabolic processes in photosynthesis.
CO2 Consumption
- The Calvin cycle is the primary metabolic process that consumes carbon dioxide.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge with these flashcards covering Chapters 7 and 8 of biology. Explore concepts like plant classification, photosynthesis, and cellular respiration. Perfect for quick reviews and enhancing your understanding of essential biological processes.
