AP Photosynthesis

AP Photosynthesis

by Lauren Ayers

Multiple Choice

In which of the following organisms did the process of photosynthesis most likely originate?

• land plants

• prokaryotes

• fungi

• unicellular aquatic eukaryotes

​4.5 BYA Earth Formed

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​3.4 BYA Prokaryotic

Chemoautotrophs

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​2.7 BYA Cyanobacteria

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​2.4 BYA Evidence of atmospheric oxygen

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​1.2 BYA Red and brown algae

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​.75 BYA Green algae

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​.475 BYA Land Plants

Multiple Choice

Which of the following statements correctly describes a distinction between autotrophs and heterotrophs?

• Only heterotrophs perform cellular respiration.

• Only heterotrophs have mitochondria.

• Only autotrophs can produce organic molecules from CO2 and other inorganic materials.

• Only autotrophs require oxygen to produce organic molecules.

Multiple Choice

Which of the following statements best describes the relationship between photosynthesis and cellular respiration?

• Cellular respiration runs the biochemical pathways of photosynthesis in reverse.

• Photosynthesis stores energy in complex organic molecules; cellular respiration releases energy from complex organic molecules.

• Photosynthesis occurs only in plants; cellular respiration occurs only in animals.

• Photosynthesis is catabolic; cellular respiration is anabolic.

Multiple Choice

How are cellular respiration and photosynthesis related, in terms of energy?

• The energy captured in photosynthesis is used to power cellular respiration.
• The energy transformed in cellular respiration is used to power photosynthesis.
• Photosynthesis and respiration perform the same task in terms of energy transformation
• Energy is not involved in either photosynthesis or cellular respiration.

​Plants are Primary Producers

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​Each mesophyll cell contains approximately 100 chloroplasts

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Multiple Select

What is this reaction showing? (select 2 correct)

• production of carbon dioxide

• production of oxygen gas

• production of sugar

• production of water

Multiple Choice

Where do the light reactions happen?

• mitochondria membrane
• thylakoid membrane
• stroma
• central vacuole

Multiple Choice

What is the main purpose of the light dependent reactions?

• To provide the energy for the calvin cycle
• To capture energy and make sugar
• To reflect green light
• To make sugars

Multiple Select

What two energy molecules are made by the light reaction? Select both answers.

• NADPH

• glucose

• ATP

• oxygen gas

Multiple Choice

Main products of the Calvin Cycle

• Oxygen, NADP+, ADP

• Glucose, CO2, ADP

• ADP, NADP+, Glucose

• ATP, NADPH, Oxygen

Multiple Choice

Which of the following is NOT a product of the light reactions?

• Oxygen

• NADPH

• ATP

• Glucose (Sugar)

Multiple Choice

The Calvin Cycle occurs in the

• Thylakoid

• Grana

• Inner membrane of chloroplast

• Stroma

Multiple Choice

What molecule absorbs sunlight for photosynthesis?

• chloroplast
• thylakoid
• grana
• chlorophyll

Multiple Choice

What is one function of the other pigments  besides chlorophyll, in the chloroplast?

• to block damaging wavelengths of light
• to absorb different wavelengths than the chloroplasts
• to provide different colors to the leaves
• to transfer energy to a separate photosystem beside the one using chlorophyll a and b.

Multiple Choice

Plants with the largest amount of which pigment will be best suited for growing conditions where light has a green hue.

• Chlorophyll A
• Chlorophyll B
• Carotenoids
• A combination of all 3

Multiple Choice

Green plants reflect ________ light.

• Red
• Green
• All
• Red and Violet

Multiple Choice

Plants use the following reactants for the light reaction

• Water and CO2

• Water and NADPH

• Water and NADP+

• NADPH and ATP

Multiple Choice

The NADP+ is

• oxidized during the light reaction

• reduced during the light reaction

• oxidized during the Calvin cycle

• reduced during the Calvin cycle

Multiple Choice

What is the function of NADP+?

• It absorbs light
• It is an electron carrier
• It is a light-reflecting pigment
• It acts as long-term energy storage

Multiple Choice

Which of the following is NOT a product of the light reactions?

• ATP
• NADPH
• Oxygen
• Glucose

Multiple Choice

What supplies the electrons that are lost in PS I?

• the electrons from PS II
• water
• glucose
• oxygen

Multiple Choice

The H+ concentration gradient is used to 

• make NADPH
• split a water molecule
• generate ATP
• form water

Multiple Choice

Rubisco is important in which step of photosynthesis

• energizing the electrons in chlorophyll

• carbon fixation when CO2 is connected to RUBP during calvin cycle

• regeneration phase as RUBP is made during calvin cycle

• reduction of the carbon chain during the calvin cycle

Multiple Choice

Where does the carbon come from that is used to form glucose?

• The soil
• CO₂ in the air
• From other carbohydrates
• Calvin Cycle

Multiple Choice

Where do the dark reactions (Calvin cycle) take place?

• thylakoid membrane

• lumen

• stroma

Multiple Choice

Which of the following molecules is not needed for the Calvin Cycle?

• CO₂
• ATP
• NADPH
• H₂O

Multiple Choice

Where does the Calvin cycle take place?

• stroma of the chloroplast
• thylakoid membrane
• outer membrane of the chloroplast
• interior of the thylakoid membrane

Multiple Choice

What is the primary function of the Calvin cycle?

• regenerate ATP for use in the light reactions of photosynthesis
• produce carbon dioxide for use in the light reactions of photosynthesis
• produce oxygen by oxidizing water
• produce simple sugars from carbon dioxide

Multiple Choice

Researchers discovered that carbon fixation in spinach leaves utilizes 45,000 molecules of ATP and 30,000 molecules of NADPH in an hour. The deficit in ATP required for carbon fixation is most directly made up for by which of the following processes?

• substrate level phosphorylation

• mitochondrial electron flow

• cyclic electron flow

• linear electron flow