Unit 3 Concept 4

Question 1

Photosynthesis

Answer 1

The overall process by which sunlight, water, and carbon dioxide are chemically converted into chemical energy stored in glucose.

Question 2

Grana

Answer 2

Pancake-like stacks of thylakoid membrane.

Question 3

Stroma

Answer 3

Fluid-like substance that fills the space between the grana.

Question 4

Chlorophyll

Answer 4

is a pigment that can absorb sunlight.

Question 5

Photosystems

Answer 5

A biochemical mechanism in plants by which chlorophyll absorbs light energy for photosynthesis.

Question 6

Electron carriers

Answer 6

Molecules that cary electrons in order to pass on their energy.

Question 7

Chemosynthesis

Answer 7

Process of an organism making its own food using chemicals instead of sunlight like in photosynthesis.

Question 8

Stomata

Answer 8

Pores on underside of leaf.

Question 9

Photorespiration

Answer 9

Adds oxygen to the Calvin Cycle instead of carbon dioxide.

Question 10

Summarize where all energy on Earth comes from and the overall processes it goes through to be in a usable form of ATP for consumers like us

Answer 10

All energy comes from the sun and the process it goes through to be in a usable form of ATP is that it goes through photosynthesis to create energy for us.

Question 11

Write and interpret the chemical formula for photosynthesis. Label the reactants and products.

Answer 11

The formula for photosynthesis is 6CO2 + 6H2O -> C6H12O6 + 6O2. The reactants are ingredients like CO2 and H2O and products are results like glucose and oxygen.

Question 12

Explain why plants are green.

Answer 12

Plants are green because of the presence of the pigment chlorophyll and it absorbs every color except green which is why it appears green to us.

Question 13

Describe the significant events of the light-dependent reaction (ETC). Include which reactants and products are involved. Highlight what will be released as a product and what will move on to the second stage. Be sure to include where the process occurs in the chloroplast.

Answer 13

The reactants and products of the light-dependent reactions are the sun as the reactants and the products are water molecules splitting, oxygen being released as a waste product and the ATP and NADPH are charged by sun. This all happens in the grana or more specificly the thylakoid membrane.

Question 14

Describe the significant events of the light-independent reaction (Calvin cycle). Include which reactants and products are involved. Highlight what will be released as a product and what will move on to continue in the cycle. Be sure to include where the process occurs in the chloroplast.

Answer 14

The reactants and products of the light-independent reaction are the use of energy-carrying molecules to make sugar and the product is the production of three carbon sugars from CO2 and H from water. The energy being carried get released as it is being transformed to another system and this occurs in the Stroma.

Question 15

Explain the alternate pathways some plants, like cacti and corn, will take to access energy.

Answer 15

Cacti open the stomata at night and close during day to get energy while corn partially close the stomata during the hottest parts of the day.

Question 16

Describe three factors that affect the rate of photosynthesis.

Answer 16

The three factors that affect the rate of photosynthesis is by light intensity, amount of CO2, and the temperature. Light intensity excites electrons causing them to move faster, CO2 allows more ingredients to work with, and temperature accelerates the chemical reaction when the temperature increases.