U5L2 Photosynthesis

Question 1

What is photosynthesis?

Answer 1

The process that transforms light energy into chemical energy.

Question 2

What is the formula for photosynthesis?

Answer 2

6CO2 + 6H2O + light → C6H12O6 + 6O2

Question 3

What are the reactants and products of photosynthesis?

Answer 3

Reactants: light, water, and carbon dioxide

Products: oxygen and sugars

Question 4

What are the two stages in which photosynthesis happens?

Answer 4

There is a light-dependent stage and a light-independent stage

Question 5

Where does the light-dependent state occur?

Answer 5

In the thylakoid membrane

Question 6

Where does the light-independent stage occur?

Answer 6

In the stroma

Question 7

What are light-dependent reactions?

Answer 7

Processes that require light :D

Question 8

What are thylakoids?

Answer 8

They are the small, flat, sack-like structures inside chloroplasts. Thylakoids are staked into towers called grana.

Question 9

What is stroma?

Answer 9

The liquid surrounding the thylakoids.

Question 10

What is chlorophyll?

Answer 10

A green pigment which captures energy from the sun.

Question 11

What do thylakoids contain?

Answer 11

Chlorophyll

Question 12

Where do light-dependent reaction take place?

Answer 12

In the thylakoids membrane.

Question 13

What happens during the light-dependent reactions?

Answer 13

These reactions take light energy that is captured by chlorophyll and covert it into
chemical energy in the form of NADPH and ATP.

Question 14

What is and the first and second stage of photosynthesis?

Answer 14

1. Light-dependent reactions
2. Light dependent (Calvin cycle) reactions

Question 15

What happens during the light-independent reactions?

Answer 15

During the light-independent
reactions the plant takes the ATP and NADPH that it made during the light-dependent reaction and uses them to make stable carbohydrates that store the energy for a long time.

Question 16

The Calvin cycle has 3 stages. What happens in the 1sr stage?

Answer 16

In the first stage, leaves absorb CO2 though tiny holes called stroma. Before the CO2 can be used, it is attached to a sugar called RuBP. After the attachment, it changes to a new compound labeled 3 PGA.

Question 17

The Calvin cycle has 3 stages. What happens in the 2nd stage?

Answer 17

ATP and NADPH are used to convert the 3 PGA molecules into glyceraldehyde 3 phosphate, G3P.

Question 18

The Calvin cycle has 3 stages. What happens in the 3rd stage?

Answer 18

G3P molecules make glucose and
other compounds are recycled to regenerate the RuBP. The regeneration requires ATP and involves a complex network of reactions.

Question 19

Compare the light-dependent and light-independent reactions in photosynthesis.

Answer 19

Light-dependent reactions take the energy from light and water and convert them into free oxygen that diffuses out of the chloroplast and into the atmosphere, and chemical energy in the form of ATP and NADPH. Light-independent reactions take the carbon dioxide ( CO2 ), ATP and NADPH and use them to
create a stable sugar ( C6H12O6 ), which stores all the energy in its chemical bonds.

Question 20

What colors does white absorbs?

Answer 20

It rejects all wavelengths

Question 21

What colors does black absorb?

Answer 21

All the wavelengths (greedy bitch)

Question 22

What does chlorophyll do in plants?

Answer 22

It captures light

Question 23

What is carotene and what does it do to the human body?

Answer 23

It acts as an antioxidant in the human body, they prevent or slow damage to cells caused by the free radicals, which are waste produced by cells in response to environmental and other stressors, such as inflammation, pollution, UV exposure, and cigarette smoke.

Question 24

Why do leaves change in the fall?

Answer 24

n the fall, because of less daylight and cooler temperatures, leaves stop the photosynthesis process. Chlorophyll breaks down and the green color disappears. Yellow and red colors appear due to the different pigments in the leaves’ tissues.