Chapter 8 - Photosynthesis

Question 1

What is the balanced chemical equation for photosynthesis?

Answer 1

6 CO2 + 6 H2O → C6H12O6 + 6 O2
Carbon dioxide plus water yields Glucose plus Oxygen

Question 2

True or False: Photosynthesis occurs in all living organisms.

Answer 2

False

Question 3

Fill in the blank: Photosynthesis primarily takes place in the ______ of plant cells.

Answer 3

chloroplasts

Question 4

What are the main reactants of photosynthesis?

Answer 4

Carbon dioxide (CO2) and water (H2O)

Question 5

What is produced as a result of photosynthesis?

Answer 5

Glucose (C6H12O6) and oxygen (O2)

Question 6

Which pigment is essential for photosynthesis?

Answer 6

Chlorophyll

Question 7

Multiple Choice: Which of the following is NOT a product of photosynthesis? A) Glucose B) Oxygen C) Carbon Dioxide

Answer 7

C) Carbon Dioxide

Question 8

What is the role of sunlight in photosynthesis?

Answer 8

It provides the energy required for the reaction.

Question 9

What type of process is photosynthesis: anabolic or catabolic?

Answer 9

Anabolic

Question 10

True or False: Photosynthesis releases carbon dioxide into the atmosphere.

Answer 10

False

Question 11

What is the significance of photosynthesis in the ecosystem?

Answer 11

It produces oxygen and organic compounds for other organisms.

Question 12

Fill in the blank: The overall process of photosynthesis can be summarized as the conversion of ______ energy into chemical energy.

Answer 12

light

Question 13

What are the two main stages of photosynthesis?

Answer 13

Light-dependent reactions and the Calvin cycle

Question 14

Multiple Choice: Which molecule captures light energy during photosynthesis? A) ATP B) NADPH C) Chlorophyll

Answer 14

C) Chlorophyll

Question 15

What is the main carbohydrate produced during photosynthesis?

Answer 15

Glucose

Question 16

True or False: Photosynthesis occurs only during the day.

Answer 16

True

Question 17

What gas do plants take in during photosynthesis?

Answer 17

Carbon dioxide (CO2)

Question 18

What is the formula for glucose?

Answer 18

C6H12O6

Question 19

Fill in the blank: Photosynthesis is crucial for the ______ chain in terrestrial ecosystems.

Answer 19

food

Question 20

What do the light-dependent reactions produce?

Answer 20

ATP and NADPH

Question 21

What is the role of water in photosynthesis?

Answer 21

It provides electrons and protons and is split to release oxygen.

Question 22

Multiple Choice: Which of the following is a byproduct of photosynthesis? A) Nitrogen B) Oxygen C) Methane

Answer 22

B) Oxygen

Question 23

How does photosynthesis help in reducing climate change?

Answer 23

It absorbs carbon dioxide from the atmosphere.

Question 24

True or False: All plants perform photosynthesis.

Answer 24

False

Question 25

What is the Calvin cycle's primary function?

Answer 25

To convert carbon dioxide into glucose.

Question 26

Which product would be radioactive if you began the reactions with radioactive oxygen in the water? Does this reaction occur during the light-dependent or independent stages of photosynthesis? What part of the chloroplast does this reaction occur in?

Answer 26

* Oxygen * Light-dependent stage * Thylakoid

Question 27

Which product would be radioactive if you began the reaction with radeioactive carbon in the carbon dioxide? Does this reaction occur during the light dependent of light independent stages of photosynthesis? What part of the chloroplast does this reaction occur in?

Answer 27

Glucose Light-independent stage Stoma

Question 28

What are four other things required for photosynthesis, other than water and carbon dioxide?

Answer 28

Sunlight, Chlorophyll ATP NADPH

Question 29

Define photosynthesis.

Answer 29

Capture light energy - run the photosynthesis reaction - convert that light energy into chemical energy (glucose)

Question 30

How do we get carbon dioxide into plants?

Answer 30

Leave, specifically stomata, open up and take in carbon dioxide

Question 31

How do we get water into plants?

Answer 31

Through the roots

Question 32

What is the plant's light energy?

Answer 32

the Sun

Question 33

What captures the sun into the plant?

Answer 33

The pigments (chlorophyll) located in chloroplasts and pigments in thylakoids (grana) - capture light energy

Question 34

What products do we end up with after photosynthesis?

Answer 34

Glucose and oxygen as a byproduct

Question 35

What are the parts of the Chloroplast? KNOW THIS

Answer 35

Stroma (light independent reactions) Thylakoids - (light dependent reactions)

Question 36

What is the key component - the pigment chlorophyll which absorbs light energy for photosynthesis?

Answer 36

Thylakoids

Question 37

Light consists of __________ which are pure energy and can only interact with pigments.

Answer 37

Photons

Question 38

The most important pigment in a plant.

Answer 38

Chlorophyll

Question 39

What is light?

Answer 39

Protons carry the light energy

Question 40

How does light interact with matter?

Answer 40

Pigments - they tranfer that energy to electrons

Question 41

How does a photosystem work?

Answer 41

1. Pigments interact with light energy. 2. They then transfer that light energy to electrons 3. then move electrons to the Electron Transport Chain 4. Electron Transport Chain is where we pull energy fro electrons and make ATP

Question 42

List the REACTANTS and PRODUCTS for the light-independent reactions.

Answer 42

1. carbon source (carbon dioxide) 2. ATP 3. NADPH 4. Calvin Cycle 5. results - glucose

Question 43

Explain the sequence of steps for the light-independent reaction.

Answer 43

1. Need ATP, NADPH, Carbon dioxide, enzyme rubisco 2. Run the Calvin Cycle 3. Build glucose molecule

Question 44

What is photorespiration?

Answer 44

Where the enzyme RuBisCO accidentally binds to oxygen instead of carbon dioxide Leads to release of carbon dioxide and a loss of fixed carbon Essentially UNDOES photosynthesis

Question 45

What process will UNDO photosynthesis?

Answer 45

Photorespiration

Question 46

Explain how C4 plants prevent photorespiration.

Answer 46

Prevents by putting its chloroplasts into different sets of cells.

Question 47

What is another way besides C4 plants to prevent photorespiration?

Answer 47

CAM plants

Question 48

Explain how CAM plants prevent photorespiration.

Answer 48

The same way as C4, but instead of having extra chloroplasts they split processes between night and day, separate rubisco.