Unit 3 Topic 2 | Photosynthesis and Cellular Respiration

Multiple Choice

What is the main process that takes place in the chloroplasts of plants?

• Respiration

• Photosynthesis

• Fermentation

• Digestion

Multiple Choice

Fill in the blank: The chemical equation for photosynthesis is CO2 + H2O + Sun's energy -> ______ + O2.

• C6H12O6

• C2H5OH

• C12H22O11

• CH4

Multiple Choice

Which of the following is a product of photosynthesis?

• Carbon dioxide

• Water

• Oxygen

• Nitrogen

Multiple Choice

What are the two main sets of reactions in photosynthesis?

• Light-Dependent and Light-Independent Reactions

• Light-Dependent and Dark Reactions

• Light-Independent and Dark Reactions

• Light and Dark Reactions

Multiple Choice

Which molecules are generated during the light-dependent reactions?

• A) ATP & NADPH

• B) G3P & Oxygen

• C) Glucose & Water

• D) Carbon Dioxide & Water

Multiple Choice

Light-dependent reactions release ___ as a by-product.

• Oxygen

• Carbon Dioxide

• Glucose

• Water

Multiple Choice

The light-independent reactions transform high-energy molecules into ____, which is used to create glucose.

• A) ATP

• B) NADPH

• C) G3P

• D) Oxygen

Multiple Choice

What is the purpose of light-independent reactions in photosynthesis?

• To generate ATP & NADPH

• To release oxygen

• To transform high-energy molecules into G3P

• To absorb sunlight.

Multiple Choice

Where do light-dependent reactions occur?

• Stroma of chloroplasts

• Inside thylakoids & across thylakoid membrane within chloroplasts

• Mitochondria

• Cytoplasm

Multiple Choice

Which of the following is a product of light-dependent reactions?

• G3P (glucose)

• CO2

• ATP

• RuBP

Multiple Choice

In light-independent reactions, the energy of ATP and the reducing power of ______ are used to reduce carbon dioxide and make glucose.

• NADPH

• O2

• H2O

• Chlorophyll

Multiple Choice

What are the requirements for light-dependent reactions?

• ATP, NADPH

• Sunlight, H2O, chlorophyll

• CO2, RuBP

• G3P, O2

Multiple Choice

The light-independent reactions occur in the ______ of chloroplasts.

• Thylakoids

• Stroma

• Mitochondria

• Cytoplasm

Multiple Choice

What is the first step of photosynthesis?

• Light-independent reactions

• Light-dependent reactions

• Calvin cycle

• Glycolysis

Multiple Choice

Which of the following reactions require energy from the sun?

• A) Light-dependent reactions

• B) Light-independent reactions

• C) Dark reactions

• D) Glycolysis

Multiple Choice

The reactions that characterize the light-dependent reactions can be broken into two categories: those involving a membrane protein called ______ and those involving a membrane protein called photosystem I (PSI).

• photosystem II (PSII)

• ATP synthase

• chlorophyll

• NADPH

Multiple Choice

What process does PSII use to produce ATP?

• Photosynthesis

• Chemiosmosis

• Glycolysis

• Fermentation

Multiple Choice

The activities of PSI are used to generate a compound called ______.

• ATP

• Glucose

• NADPH

• Oxygen

Multiple Choice

What molecule in Photosystem II becomes excited when struck by light energy?

• Water

• Oxygen

• Chlorophyll

• ATP

Multiple Choice

In the electron transport chain, what is released into the thylakoid with each transfer of the electron?

• Oxygen

• Energy

• Water

• ATP

Multiple Choice

During photolysis, what is released and what builds up in the thylakoid?

• Oxygen is released, and hydrogen ions build up.

• Hydrogen ions are released, and oxygen builds up.

• Water is released, and ATP builds up.

• ATP is released, and water builds up.

Multiple Choice

The process of pushing hydrogen into the stroma by the energy released by the ETC is known as ________.

• A) Photolysis

• B) Chemiosmosis

• C) ATP synthesis

• D) Photosynthesis

Multiple Choice

What molecule is used to reduce ADP to ATP in the stroma?

• Oxygen

• Hydrogen ions

• Water

• Chlorophyll

Multiple Choice

What happens to the electron in Photosystem I during Step 6?

• It is excited and leaves PSI

• It is absorbed by PSII

• It remains in PSI

• It is converted to ATP.

Multiple Choice

In Step 7, the electron from PSI is received by an electron carrier in the stroma, which releases hydrogen to reduce _______ to NADPH.

• NADP+

• ATP

• ADP

• Oxygen

Multiple Choice

What is the main product of the light-dependent reactions that will be used for light-independent reactions?

• Oxygen

• NADPH

• Glucose

• Water

Multiple Choice

During the light-dependent reactions, what replaces the electron that leaves PSI?

• A new electron from water

• The original electron that left PSII

• An electron from NADPH

• An electron from ATP

Multiple Choice

What is the end result of the light-dependent reactions?

• Production of glucose

• Production of ATP and NADPH

• Release of oxygen

• Absorption of carbon dioxide

Multiple Choice

What is the role of PSII in the electron transport chain?

• It captures light energy and initiates electron transport.

• It synthesizes ATP.

• It transports electrons to PSI.

• It converts NADP+ to NADPH.

Multiple Choice

In the electron transport chain, ATP Synthase is responsible for ______.

• capturing light energy

• synthesizing ATP

• transporting electrons

• converting NADP+ to NADPH

Multiple Choice

Which of the following is located between PSII and PSI in the electron transport chain?

• A) ATP Synthase

• B) Electron Transport Chain

• C) NADP+

• D) Stroma

Multiple Choice

Which process in the light-dependent reactions of photosynthesis involves the splitting of water molecules?

• Photo-excitation

• Photolysis

• Chemiosmosis

• Reduction

Multiple Choice

In the light-dependent reactions, ATP is synthesized by the enzyme ________.

• A) PSII

• B) PSI

• C) ATP Synthase

• D) NADPH

Multiple Choice

What is the role of NADPH in the light-dependent reactions of photosynthesis?

• Electron carrier

• Water splitter

• Light absorber

• ATP producer

Multiple Choice

What are the molecules required in the stroma of the chloroplast to synthesize glucose?

• A) ATP and NADPH

• B) ADP and NADH

• C) ATP and NADH

• D) ADP and NADPH

Multiple Choice

The process of synthesizing glucose in the absence of light is known as the _______.

• Krebs Cycle

• Calvin Cycle

• Citric Acid Cycle

• Glycolysis

Multiple Choice

Which of the following is NOT a step in the light-independent reactions?

• A) Carbon dioxide fixation

• B) Activation & Reduction

• C) Replacement of RuBP

• D) Electron Transport Chain

Multiple Choice

How many molecules of ATP and NADPH are required for the light-independent reactions?

• 4

• 5

• 6

• 7

Multiple Choice

The light-independent reactions usually take place during the _______.

• night

• day

• evening

• morning

Multiple Choice

What is the first step of the Calvin Cycle?

• Activation & Reduction

• Carbon Fixation

• Replacement of RuBP

• Glucose Production

Multiple Choice

How many ATP molecules are required to produce one molecule of glucose?

• 12

• 18

• 24

• 30

Multiple Choice

Fill in the blank: The Calvin Cycle must repeat twice to produce one molecule of ______.

• A) ATP

• B) NADPH

• C) Glucose

• D) RuBP

Multiple Choice

Which enzyme is involved in the Carbon Fixation step of the Calvin Cycle?

• ATP synthase

• Rubisco

• NADPH oxidase

• Glucose isomerase

Multiple Choice

What are the products of the Activation & Reduction step in the Calvin Cycle?

• ATP and CO2

• NADPH and G3P

• RuBP and Glucose

• CO2 and G3P

Multiple Choice

What is required to initiate the carbon dioxide fixation cycle?

• 2 CO2 molecules

• 3 CO2 molecules

• 4 CO2 molecules

• 5 CO2 molecules

Multiple Choice

In the carbon dioxide fixation process, each CO2 binds to a molecule of ______ in the stroma with the help of an enzyme called rubisco.

• ATP

• NADPH

• RuBP

• G3P

Multiple Choice

What is the end result of the carbon dioxide fixation process?

• 4 molecules of 3-PGA

• 5 molecules of 3-PGA

• 6 molecules of 3-PGA

• 7 molecules of 3-PGA

Multiple Choice

During activation & reduction, each 3-PGA molecule binds to a molecule of ______.

• ATP

• NADPH

• RuBP

• G3P

Multiple Choice

How many G3P molecules are required to replace RuBP?

• 3

• 4

• 5

• 6

Multiple Choice

What is the main purpose of the light reactions in photosynthesis?

• To produce sugar

• To convert light energy into chemical energy

• To release carbon dioxide

• To absorb oxygen.

Multiple Choice

In the Calvin cycle, which molecule is fixed to produce sugar?

• Oxygen

• Water

• Carbon dioxide

• ATP

Multiple Choice

Fill in the blank: During photosynthesis, light energy is converted into chemical energy in the form of _______.

• A) ATP and NADPH

• B) Sugar and Oxygen

• C) Water and Carbon Dioxide

• D) ADP and Pi

Multiple Choice

Which of the following is a product of the light reactions in photosynthesis?

• Carbon dioxide

• Sugar

• Oxygen

• Water

Multiple Choice

Fill in the blank: The Calvin cycle uses ATP and NADPH to convert _______ into sugar.

• Oxygen

• Carbon dioxide

• Water

• Light