Unit 3 - Class 6

Question 1

Two photsytems connected by an electron transport chain generate NADPH and ATP

long us whiteboard as tool*

this one will take longest time to study out of flash cards*

Answer 1

1. photosystem 2 absorbes a photon of light
2. An electron is energized and accepted by the primary accepter
3. Water is split and the 2e- produced used to replace missing electrons in
   PS 2
4. High energy electron passed down from ETC replaces lost electron of PS1and H+ ions pumped into Tylakoid space
5. PS 1 absorbes photon, an electron is energized accepted by primary accepter passed on to small ETC
6. High energy electrons passed to NADP+ reducing it to NADH

Question 2

Two photosystems connected by an electron transport chain generate ATP and NADH PT 2

another long one might need whiteboard or paper to answer *

Answer 2

1. PS 2 uses light energy to move an electron from water to ETC
2. ETC pumps H+ ions into the tylakoid space to make
3. PS 1 uses light energy to move an electron from the ETC to NAD+
   reduces to NADH
4. High H+ concentration in tylakoid space powers ATP synthase makes ATP by process of Chesmiosmosis

Question 3

Light Reactions converting light energy into chemical energy (NADPH and ATP)

third and last long one*

Answer 3

• light energy absorbed by two photosystems drives the flow of electrons from water to NADPH
• ETC helps to produce the concentration gradient of H+ and in the tylakoid space which drives H+ through ATP synthase producing ATP
• beucse initial energy input is light , the chemiosmtic production of ATP is called phosphorylation

Question 4

Calvin Cycle reactions are…

Answer 4

Light independent reactions

Question 5

Calvin cycle has…

Answer 5

atmospheric CO2

Question 6

Calvin Cyle uses …

Answer 6

ATP and NADPH to produce energy-rich G3P (3 carbon sugar)

Question 7

Plant cell uses…

Answer 7

G3P to make Glucose, dicarssiride sucrose, cellulose, and other organic molecules

Question 8

Calvin Cycle Stage one (carbon fixation)

Answer 8

3 molecules CO2 (1C) combine with 3 molecules of RuBP (5C) to form 6 (3C) molecules

Question 9

Calvin Cycle Stage two (reduction)

Answer 9

the 6 (3c) molecules are reduced to 6 high-energy molecules of G3P

Question 10

Calvin Cycle Stage 3 (relaese of a molecule of G3P)

Answer 10

5 G3P (3C) remain in the cycle
1G3P (3C) is removed from the cycle

Question 11

Calvin Cycle Stage 4 (Regenration of RuBP)

Answer 11

5 molecules of G3P (3C) are converted back to 3 molecules of RuBP (5C) to restart the cycle

Question 12

What is a photosystem and where is it located in the chloroplast?

Answer 12

are functional units for photosynthesis and are found in the tylakoid membranes in the chloroplasts

Question 13

What is the main purpose of the Calvin cycle?

Answer 13

to produce simple sugars for the plant that can be transformed into Glucose for the plant.