2.4: Photosynthesis

Question 1

______, by definition, use photons (light) instead of chemical substrates, such as glucose, as an energy source to derive ATP.

Answer 1

Phototrophs

Question 2

Phototrophs use what instead of chemical substrates?

Answer 2

Phototrophs, by definition, use photons (light) instead of chemical substrates, such as glucose, as an energy source to derive ATP.

Question 3

______ is the process of capturing sunlight and converting it into the usable energy sources ATP and NADPH.

Answer 3

Photosynthesis

Question 4

What is Photosynthesis?

Answer 4

Photosynthesis, the process of capturing sunlight and converting it into the usable energy sources ATP and NADPH.

Question 5

Where does Photosynthesis occur?

Answer 5

The Chloroplasts

Question 6

______ are double membrane-enclosed organelles specific to algae and plants and house the photosynthetic pigment chlorophyll

Answer 6

Chloroplasts

Question 7

What is a Chloroplast?

Answer 7

Chloroplasts are double membrane-enclosed organelles specific to algae and plants and house the photosynthetic pigment chlorophyll

Question 8

Were is the photosynthetic pigment chlorophyll housed?

Answer 8

Chloroplast

Question 9

Chloroplast houses a photosynthetic pigment called ______.

Answer 9

Chlorophyll

Question 10

True or False: Animal cells do not contain chloroplasts.

Answer 10

True

Question 11

Photosynthesis is a two-step process that can be broken into light and dark reactions, ___1___, the light reaction and ___2___, the dark reaction.

Answer 11

1. Photophosphorylation
2. The Calvin Cycle

Question 12

The first step in Photosynthesis is ___1___ also referred to as the ___2___.

Answer 12

1. Photophosphorylation
2. The Light Reaction

Question 13

What is the first step in Photosynthesis?

Answer 13

Photophosphorylation (The Light Reaction)

Question 14

The second step in Photosynthesis is ___1___ also referred to as the ___2___.

Answer 14

1. The Calvin Cycle
2. The Dark Reaction

Question 15

What is the second step in Photosynthesis?

Answer 15

The Calvin Cycle (The Dark Reaction)

Question 16

______, is the process of converting light energy into chemical energy to be used by the cell in the forms of ATP and NADPH.

Answer 16

Photophosphorylation, also known as the light reaction

Question 17

Photophosphorylation, also known as the light reaction, is the process of converting light energy into …….

Answer 17

……chemical energy to be used by the cell in the forms of ATP and NADPH.

Question 18

True or False: In the Photophosphorylation Process the presence of light is not always required.

Answer 18

False. The presence of light is ABSOLUTELY required

Question 19

The Photophosphorylation process/reactions always occur in the ______.

Answer 19

membrane

Question 20

______, involves the ability of a microorganism to use the ATP and NADPH generated in the light reaction to convert carbon dioxide (CO2) and water (H2O) into organic carbon compounds and useful carbohydrates, a process referred to as carbon fixation.

Answer 20

The Calvin cycle, also referred to as the dark reaction

Question 21

The Calvin cycle, also referred to as the dark reaction, involves the ability of a microorganism to use the ATP and NADPH generated in the light reaction to convert ___1___and ___2___into organic carbon compounds and useful carbohydrates, a process referred to as ___3___.

Answer 21

1. carbon dioxide (CO2)
2. water (H2O)
3. carbon fixation

Question 22

The primary function of the Calvin cycle is to produce the ___1___, which, through a series of steps, eventually leads to the generation of ___2___.

Answer 22

1. three-carbon compound glyceraldehyde 3-phosphate (G3P)
2. glucose

Question 23

What is the primary function of the Calvin cycle?

Answer 23

The primary function of the Calvin cycle is to produce the three-carbon compound glyceraldehyde 3-phosphate (G3P), which, through a series of steps, eventually leads to the generation of glucose.

Question 24

During he Calvin Cycle ___1___ and ___1___ are reverted back to ___2___ and ___2___, which are reused during the light cycle.

Answer 24

1. NADPH and ATP
2. NADP and ADP

Question 25

True or False: The end products of the Calvin cycle supply the molecules required during the light reactions, just as the end products of the light reactions enable the dark reactions to occur. Thus, the light and dark reactions are a cooperative system where each reaction is dependent upon the other.

Answer 25

True

Question 26

In order for sufficient resupply, the Calvin cycle requires ______ turns (or repetitions) to generate one molecule of glucose.

Answer 26

6

Question 27

An incomplete brief summary of the total reaction following six turns is shown below. Finish it:
6 CO2 + 18 ATP + 12 NADPH + 12 H20 →

Answer 27

C6H12O6 + 18 ADP + 12 NADP+

Question 28

An incomplete brief summary of the total reaction following six turns is shown below. Finish it:
→ C6H12O6 + 18 ADP + 12 NADP+

Answer 28

6 CO2 + 18 ATP + 12 NADPH + 12 H20