Exam 2 - Photosynthesis

Question 1

What to processes does photosynthesis consist of?

Answer 1

The light reaction and Calvin cycle

Question 2

Where does the Calvin cycle occur?

Answer 2

In the stroma

Question 3

Where does the light reactions process occur?

Answer 3

In the proteins in the thylakoid membrane.

Question 4

What are the reactants of photosynthesis?

Answer 4

Light, CO2, and H2O

Question 5

What are the products of photosynthesis

Answer 5

Oxygen and sugar

Question 6

Define Pigment

Answer 6

A molecule that absorbs a portion of visible light

Question 7

Is black a pigment?

Answer 7

Yes, it is absorbing all colors of light

Question 8

Is why a pigment?

Answer 8

No, it is not absorbing any light

Question 9

Chlorophyll

Answer 9

A pigment that absorbs blue and red light

Question 10

Define photosystem

Answer 10

A cluster of 2 to 300 chlorophyll molecules

Question 11

Define Reaction center

Answer 11

The central chlorophyll in the photosystem.

Question 12

Define photosystem II

Answer 12

It uses energy from light to split H20 into H+, oxygen, and electrons

Question 13

Define photosystem I

Answer 13

Uses energy from light to boost electrons up to a higher energy level

Question 14

Out of photosystem one and photosystem two, which one is involved in Cyclic electron flow

Answer 14

Photosystem one

Question 15

Out of photosystem one and photosystem two, which one is involved in non-cyclic electron flow?

Answer 15

Both photosystem one in photosystem two

Question 16

Non-Cyclic Electron Flow: Step 1

Answer 16

Photosystem two breaks down water

Question 17

Non-Cyclic Electron Flow: Step 2

Answer 17

Takes electrons from broken down water and passes them on to the electron transport chain.

Question 18

Non-Cyclic Electron Flow: Step 3

Answer 18

Electrons are passed down and lose energy through the transport chain and eventually reach photosystem one

Question 19

Non-Cyclic Electron Flow: Step 4

Answer 19

Once electrons reach for someone, they use energy from light to boost them up to a higher energy

Question 20

Non-Cyclic Electron Flow: Step

Answer 20

Electrons that are boosted up to a higher Energy level are attached to NADP+ to make NADPH

Question 21

Difference between Cyclic and Non-Cyclic electron flow cycles?

Answer 21

Once electrons are boosted to a higher energy level, they are sent back to transport chain to produce ATP

Question 22

Where does the CO to die is entering the Calvin cycle come from?

Answer 22

The atmosphere

Question 23

Where is Rubisco found in the Calvin cycle?

Answer 23

In the plant cell

Question 24

What is Rubisco’s role in the Calvin cycle

Answer 24

Rubisco rearranges the 3 5-carbon molecules into 5 3-carbon

Question 25

Where does sucrose synthesis occur?

Answer 25

In the cytoplasm

Question 26

How many total carbons are there in the Calvin cycle?

Answer 26

There are 15 to begin with and you want 15 at the end. Three are put in from the atmosphere and three are lost to synthetic sucrose for 1G3P module

Question 27

How many times would we need to run the Calvin cycle to produce one molecule of sucrose

Answer 27

Since sucrose is a 12 carbon. Molecule, then we would need to run the carbon cycle four times

Question 28

The Calvin cycle is also known as what

Answer 28

Carbon fixation

Question 29

What does Rubisco do?

Answer 29

Rubisco takes 3 CO2 and uses 3 RUDP to make 6 PGA.

Question 30

Is Rubisco efficient or in efficient?

Answer 30

in efficient

Question 31

How many reactions per second can RuBisCO do?

Answer 31

Three

Question 32

Does oxygen help or hurt RuBisCO?

Answer 32

It hurts it. RuBisCO is inhibited by 02

Question 33

Does the ruBisco have a high or low affinity for CO2?

Answer 33

It has a low affinity.

Question 34

What is the most common enzyme in the biosphere?

Answer 34

RuBisCO

Question 35

How do plants compensate for how slow RuBisCO is?

Answer 35

They produce a lot of RuBisCO.

Question 36

Definition of fixed Carbon.

Answer 36

Fix carbon is carbon that is useful/usable for biorganoc life