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Study Sheet for Honors Biology Chapter 7 Test
ANSWERS
#1
• Equation for photosynthesis
#1
CHLOROPLAST DIAGRAM
• A. Outer membrane• B. inner membrane• C. granum• D. thylakoid disk• E. stroma
#3
DIAGRAMS
• Leaf Cross Section
Answers
• A=cuticle• B=Upper epidermis• C=Vein• D=Phloem• E=xylem• F=Palisade layer• G=spongy layer• H=guard cell• I=stomata
What is the enzyme?
That is the most abundant in the world?• Amylase• Rubisco• ATP synthase• Peptidase
• ANSWER: rubisco
Leaf Structure and Function
• Gases enter – stoma• Xylem-tubes carrying
water roots, stem, leaves
• Phloem-food carrying tubes
• Cuticle-protective waxy outer layer
• Air space -area in spongy layer for gases
• Stoma-opening in leaf (usually lower)
• Guard cell -open and close to let gases in/out stoma
• Palisade layer – vertically, tightly packed cells with chloroplasts
Leaf Structure and Function
• Mesophyll = palisade layer + spongy layer
• Upper epidermis – transparent, thick cells to protect upper leaf
• Lower epidermis – transparent, thick cells to protect lower leaf
• Bundle sheath = cells around xylem and phloem, with chloroplasts
• Chloroplast = green organelles, site of photosynthesis
4. Chlorophyll a• Absorbs: blue-violet
and red• Reflects: green• Function: absorbs
photons of light and transfer that energy to e-
• When light hits it:• Resonates (flexible)
between double and single bonds + pass to P680 or P700
Where do you find chlorophyll a?
• In chloroplasts found in thylakoid disk membrane:– In palisade layer– In Spongy layer– In bundle sheath– In guard cells
Difference between xylem and phloem
• Xylem –carries water up the roots, stems, & leaves
• Phloem – carries food
Up and down the roots, stems, & leaves
5. Where are PSII and PSI?
• Found: in thylakoid disk of chloroplast• What do they produce?• PSII – high energy electron to ETC (Pq
first)• -H+ ions to collect in thylakoid lumen• -O2 to be released out stoma
• PSI –high energy e- passed to NADP+
5. Identify the Parts of the Photosystem
A B
C
D E F
G H
Identify the Parts of the Photosystem
Identify the letters
L
Identify the letters• A. PSII G. H+• B. H20 H. NADPH
• C. O2 I. Cytb6
• D. ETC J. Pq• F. NADP+ K. FNR L. Pc
L
Describe the processes at the red circles
Identify the numbers
• 1- light hit PS• 2- excited e- from P680 to primary e- acceptor• 3- water split• 4- excited e- down ETC to Pq to Ctyb6 to Pc• 5- P700 accepts e- from Pc• 6- e- to NADP+
reduced to NADPH L
#6 Photophosphorylation
•Uses sunlight to produce ATP
#6 Photophosphorylation
Cyclic Noncyclic (linear)
In Out
In Out
One light event(PSI, cytb6, Pc)
ADP ATP
2 light events(PSII, Pq, cytb6, Pc, & PSI)
Water Oxygen ADP ATPNADP+ NADPH
Photophosphorylation Chemiosmosisin photosynthesis in cellular respiration
• Uses sunlight• H+ are collected in
lumen of thylakoids• H+ formed from
splitting of water
• Starts with high energy glucose
• H+ form NADH and FADH2
• H+ passed through inner membrane of mitochondrion to intermembrane space
In both photophosphorylation and chemiosmosis in cellular respiration
• H+ pass through ATP synthase to turn it and ADP + P forms ATP
#8 Where does the oxygen come from that we breathe?
• Splitting of oxygen in LDR• (linear
photophosphorylation)
#9 What is the source of carbon for glucose?
Carbon dioxide
#10
• Carbon fixation is making an inorganic molecule (like carbon dioxide) into a useable organic molecule (like 3-PGA.
#10
• Carbon fixing occurs in the __• Calvin cycle• What happens there?• (When RuBP + RuBisCo +
CO2 to form 3 PGA)
#11 What two high energy molecules are made at the end of linear photophosphorylation?
•ATP
And NADPH
collected in the stroma
#12 Where made?
• G3P• Stroma• NADPH• Stroma• ATP • stroma
Where made?
• Oxygen• Lumen of thylakoid disk• RuBisCO• Stroma• e- excited by photons• Thylakoid disk membrane
Where made?
• RuBP• Stroma• NADP+• stroma• Water split• Lumen of thylakoid
Color Reflected
• Xanthophyll• Yellow• Carotenoid• Orange• Lycopene• red• Chlor b• Yellow-green
• Rhdopsin• purple• Canthaxanthin• Orange-yellow
#14-15• PRODUCTS OF LIR (Calvin cycle)• ADP• NADP+• G3P (can join to form glucose)• PRODUCTS OF LDR (linear
photophosphorylation)• ATP• NADPH• OXYGEN
#16• What do excited e- cause to happen as
they pass through the Cytochrome-b6?
• Pull H+ ions across from thylakoid lumen across the thylakoid membrane to the stroma.
#17
• In the Calvin cycle what two molecules join with the enzyme RuBisCO?
•RuBP and CO2
#18 What are the two fates of excited chlorophyll?
• Pass energy to excite an e- that are passed to ETC (in thylakoid membrane) like to Pq
• Fluoresce and release
the energy (photon)as red
color (if no thylakoid)
#19
• How many CO2 molecules are needed to produce one glucose molecule?
• 6• 6 turns of Calvin cycle to make one
glucose
What are the final e- acceptors?
• Final electron acceptor in cellular respiration is oxygen
• Final electron acceptor in LDR is NADP+
• H+ ions power the ATP synthase to make ATP
#20 Strongest biological oxidizing agent
• P680
#21
• What makes guard cells open and close?
• If turgid – guard cells open• If flaccid – guard cells close
Note salt concentrations in the cells and the arrows showing
• Remember: hypo to hyper• Stoma Animation flacci
dturgid
#22 Calvin Cycle
• INPUT: 6 CO2 OUTPUT: 2 G3P
• 18 ATP 18 ADP + P• 12 NADPH 12 NADP+
What is…?
• Carbon Fixation?• ANSWER: changing of
unusable atmospheric CO2 into usable organic compounds (like glucose)
3 PGA
#23
• What is formed at the end of each phase of the Calvin cycle?
• Fixation• 3 PGA• Reduction• G3P• Regeneration• Recycle RuBP
#24
• In the LDR (PSII) water splits into:
• e-• H+• oxygen
#25 Which greenhouse gas has the most affect on global
warming?•CO2
UVinfrared
Greenhouse effect
• Protects earth from: UV rays• 3 Greenhouse gases: CO2 O2 H2O
• Increases in CO2 due: to burning fossil fuels
• Negative effects: melt glaciers, increased sea levels, change to extreme weather (more hurricanes, extreme weather)
#26
• The banning of CFC’s was done because of what problem?
• CFC’s were breaking down the ozone• This allowed UV light to enter the
atmosphere at dangerous levels
#34 CFC’s
CFC’s
• Chlorofluorocarbons• Were put in aerosols, refrigerants, and
styrofoam
• Products containing CFC’s were Banned by those signing the Montreal Protocol
Ozone Thinning Over Antarctica
• Icy molecules react withCFC’s more than other particles
#27
• Write a conclusion.
#28 What is photoprotection
• Carotenoids reflect orange
#29
• What does P680 and P700 mean?• These are the wavelengths that these
chlorophyll molecules absorb.
DIAGRAM
• A. PS II• B. ETC• C. PS I• D. thylakoid interior• E. ATP synthase• F. stromaF
680 700
#30
• PRODUCT FORMED:• From fixing of carbon dioxide• 3 PGA• At the end of PSI• NADPH• As a result of photophoshorylation• ATP
#30
• Formed in the regeneration phase of the Calvin cycle
• RuBP• Formed in the reduction phase of the
Calvin cycle• G3P• Formed from the surplus of G3P• RuBP
#30
• WHERE FOUND?• H+ high concentration = lumen• Excited e - = PSII and PSI• Water splitting = lumen• NADPH and ATP = stroma• ETC = thylakoid membrane
#30 Where do these take place?
• LDR takes place in • the thylakoid disks• LIR takes place in • the stroma
8. Where does each take place?
• LIR• LDR• Calvin cycle• ETC• Chemiosmosis• Splitting of water
• Stroma• Thylakoid disks• Stroma• Thylakoid membrane• Thylakoid interior through thylakoid
membrane to stroma• Thylakoid interior
Where do the H+ collect after they are split from water?
G
Where do the H+ collect after they are split from water?
D – thylakoid interior
H+ H+
H+ H+
G
Where is the ATP synthase located?
G
Where is the ATP synthase located?
E
G
Where would NADPH and ATP be found?
G
Where would NADPH and ATP be found?
G
G
(stroma)