In chemiosimosis in mitochondria, protons flow from the intermembrane space into the matrix, whearas in chemiosimosis in chloroplast, protons flow from __________

the thylakoid space to the stoma

the stoma to the thylakoid space

Which of the following events occurs in the light reactions of photosynthesis?

light is absorbed and funneled to chlorophyll a

carbon dioxide is fixed in organic molecules

What is the function of NADP+?

It is a light-reflecting pigment

It acts as long-term energy storage

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

to absorb different wavelengths than the chlorophyll

to block damaging wavelengths of light

to provide different colors to the leaves

to transfer energy to a separate photosystem beside the one using chlorophyll a and b.

Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?

The light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle returns ADP, ℗i, and NADP+ to the light reactions.

The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the Calvin cycle provides water and electrons to the light reactions.

The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP.

The light reactions provide the Calvin cycle with oxygen for carbon fixation, and the Calvin cycle provides the light reactions with sugars to produce ATP.

Rubisco is important in which step of photosynthesis

carbon fixation when CO2 is connected to RUBP during calvin cycle

energizing the electrons in chlorophyll

regeneration phase as RUBP is made during calvin cycle

reduction of the carbon chain during the calvin cycle

Why does photorespiration occur?

stomata are closed and CO2 levels are too low.

stomata are closed and O2 levels are too low.

stomata are open and too much water is leaving the plant

stomata are open and the plant receives too much CO2

The light reactions occur in the ________ and the dark reactions take place in the ________.

Chloroplast / thylakoid membrane

What is the primary function of the Calvin cycle?

produce simple sugars from carbon dioxide

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

Which of the following is the correct equation for PHOTOSYNTHESIS?

6CO 2 + 6H 2 O --> 6O 2 + C 6 H 12 O 6

6CO 2 + C 6 H 12 O 6 + 6H 2 O --> O 2

6O 2 + 6H 2 O --> 6CO 2 + C 6 H 12 O 6

C 6 H 12 O 6 + 6O 2 ---> 6H 2 O + 6CO 2

Which of the following is directly associated with Photosystem I?

receiving electrons from the thylakoid membrane ETC

harvesting light energy to make ATP

extraction of hydrogen electrons from the splitting of water

What does ATP synthase do?

Break down ATP in chemiosmosis.

Electrons become energized during photosynthesis when

they are struck with light energy

they are incorporated into oxygen

Since we're building a carbohydrate in the Calvin Cycle, is the process endergonic or exergonic and why?

Endergonic because carbohydrate production is anabolic.

Endergonic because carbohydrate production is catabolic

Exergonic because carbohydrate production is anabolic

Exergonic because carbohydrate production is catabolic

AP Biology Photosynthesis Review

Authored by Michelle Bibel

Biology

11th - 12th Grade

NGSS covered

Used 165+ times

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36 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin Cycle?

CO₂ and glucose

ATP and NADPH

ADP, P and NADP+

H₂Oand O₂

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Where does the Calvin cycle take place?

Stroma

thylakoid

thylakoid space

matrix

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When oxygen is released as a result of photosynthesis, it is a direct by-product of____

reducing NADP+

splitting water molecules

chemiosmosis

electron transfer in photosystem 1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main role of the pigment molecules in a light-harvesting complex in the thylakoid membranes?

split water and release oxygen to te reaction-center chloropyll

transfer light energy to the reaction-center chlorophyll

synthesize ATP

transfer electrons to NADPH

In what respect are the photosynthetic adaptations of C₄ plants and CAM plants similar?

an enzyme other than Rubisco carries out the first step in carbon fixation

both types of plants make most of their sugar in the dark

both types of plants make their sugar without the Calvin cycle

Stomata normally close during the day

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

T or F: The light reactions of photosynthesis suppley the calvin cyucle with ATP and NADPH

True

False

T or F: In photosynthetic cells, the electron transport chains are located in the thylakoid membranes and mitochondrial inener membranes.

True

False

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AP Biology Photosynthesis Review

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin Cycle?

Where does the Calvin cycle take place?

When oxygen is released as a result of photosynthesis, it is a direct by-product of____

What is the main role of the pigment molecules in a light-harvesting complex in the thylakoid membranes?

In what respect are the photosynthetic adaptations of C4 plants and CAM plants similar?

T or F: The light reactions of photosynthesis suppley the calvin cyucle with ATP and NADPH

T or F: In photosynthetic cells, the electron transport chains are located in the thylakoid membranes and mitochondrial inener membranes.

In chemiosimosis in mitochondria, protons flow from the intermembrane space into the matrix, whearas in chemiosimosis in chloroplast, protons flow from __________

Which of the following events occurs in the light reactions of photosynthesis?

The color of light least effective in driving photosynthesis is _________

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In what respect are the photosynthetic adaptations of C₄ plants and CAM plants similar?