Unit 3 - Class 4

Question 1

Draw label and describe structure of Leaf and Cloroplast

Answer 1

S.G. - 4

Question 2

I can draw, label, describe two stages photosynthesis showing link between ATP and NADPH

Answer 2

S.G. -4

Question 3

How do ATP and NADH link the two stages of Photosynthesis

Answer 3

Products of one stage - reactants of next

Question 4

How does cell use ATP for energy? 1.

Answer 4

Two Covalent bonds broken - Phosphate bond + water broken into H - OH freely available in solution (energy absorbed)

Question 5

How does a cell use ATP for energy? 2.

Answer 5

Two bonds created (energy release)

free phosphate - covalently bonded to OH

other phosphate covalently bonded to H

Covalently - (sharing of electrons - forming electron pairs)

Question 6

How does a cell use ATP for energy? 3.

Answer 6

Product molecules = less potential energy then reactant molecules

Question 7

Photosynthesis fuels the biosphere

Biosphere is…

Answer 7

TRUE

Bioshphere - region above and below earths surface where life exists

Question 8

Autotrophs

Answer 8

Organisms making their own food

Question 9

Autograph type 1 - Photoautotrophs

Answer 9

use light as energy source (plants Algae, photosynthetic bacteria)

Question 10

Autograph type 2 - Chemoautogrophs

Answer 10

use chemicles as energy source ( some bacteria )

Question 11

Heterotrophs

Answer 11

Organisms consuming other plants (animals, decompse organic material)

Question 12

What plant structures are involved in photosynthesis? (1)

stromata

Answer 12

Stromata - tiny pores in the leaf - allow CO2 to enter and O2 to exit

Question 13

Plant Structures involved in photsynthesis?

Veins , Mesophyll

Answer 13

Veins - transport water absorbed by roots

Mesophyll - cells inside leaf - have chlorplast

Question 14

Plant structures involved in photosynthesis? (2)

chlorphyll

Answer 14

Chlorphyll - green pigment inside tylakoid (absorbes light energy)

Question 15

Structure of Chloroplast 1

organelle , stroma

Answer 15

organelle enclosed by outer and inner membrane

Stroma - inner compartment filled with thick fluid

Question 16

Structure of Chloroplast 2

Tylakoids, Granum, Tylakoid space

Answer 16

Tylakoids - membrane sacs in stroma

Granum - stack of tylakoids

Thylakoid spcae - iside part of tylakoids

Question 17

Structure of Chloroplast 3

chlrophyll , tylakoid sacs

Answer 17

Chlorophyll - inside thylakoid membrane

Thylakoid sacs - connected together

Question 18

Explain the balanced equation of Photosynthesis?

Answer 18

autotrophic organisms use light energy to make sugar + O2 gas from CO2 and H2O

Question 19

Photo means…
Synthesis means…

Answer 19

light
to synthesize sugar

Question 20

Phtosynthesis is a…

redox purpose

Redox Reactions

Answer 20

Redox Process

transfer energy

paired chemical reactions that transfer H or electrons

Question 21

Phtosynthesis Equation

My way rember 1 , 2, 3,4,

Answer 21

6 CO2 + 6 H2O —– C6H12O6 + O2

1 2 3 4

Question 22

Photosynthesis equation in reduction + oxidation

1 to 3 2 to 4

Answer 22

1-3 becomes reduced by gaining electrons

2-4 becomes oxidized by loosing elections

Question 23

Two stages of Photosynthesis satge 1

Answer 23

Light Reactions - which convert light energy to chemical energy (ATP and NADH)

occers in tylakoids

Question 24

Two Stages of photosynthesis stage 2

Answer 24

Calvin Cycle - ATP and NADH made from light reactions provides energy to make sugar from CO2

occers in stroma