Topic 3.8: Photosynthesis Flashcards Preview

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Flashcards in Topic 3.8: Photosynthesis Deck (13):
1

What does all life need?

energy

2

How do heterotrophs get and use their energy?

get their energy from “eating others”; consumers or other organisms; consume organic molecules; making energy & organic molecules from ingesting organic molecules; glucose+oxygen yields carbon dioxide+water+energy; C6H12O6+6O2 yields 6CO2+6H2O+ATP
 

3

How do autotrops get and use their energy?(6)

get their energy from “self”; get their energy form sunlight or chemicals; use light energy to synthesize organic molecules; making energy & organic molecules from light energy; carbon dioxide+water+energy yields glucose+oxygen; 6CO2+6H2O+light energy yields C6H12O6 + 6O2

4

What is the purpose of the leaves?

to collect sunlight

5

What is the purpose of the stomates?

to collect carbon dioxide for gas exchange

6

What is the purpose of the roots?(2)

uptake of water; uptake of nutrients

7

What are the parts of the chloroplast?(4)

double membrane; stroma; thylakoid sacs; grana stacks

8

What is the importance of chlorophyll and the electron transport chain in the thylakoid membrane?

There is a build up of H+ (proton) gradient within the thylakoid sac

9

What are th best and worst wavelengths for chlorophyll a?(2)

absorbs red and blue light the best; reflects green so it is least absorbant

10

What do galvometers measure?

galvometers measure light transmittance

11

What does the light reactions do?

convert solar energy to chemical energy(ATP)
 

12

What does the calvin cycle/light independent reaction do?

uses chemical energy (NADPH & ATP) to reduce CO2 to build C6H12O6 (sugars)
 

13

What is light intensity?

varies inversely with the square of the distance (farther away, less intense)
 

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