Chapter 8 Bio

Equation for photosynthesis Which best represents the overall equation for photosynthesis? 12 H2O + Light energy → C6H12O6 + 6 O2 + 6 CO2 + 6 H2O 6 CO2 + 12 H2O + Light energy → C6H12O6 + 6 O2 + 6 H2O C6H12O6 + 6 O2 + 12 H2O + Light energy → 6 CO2 + 12 H2O 6 CO2 + 12 H2O + Light energy → C6H12O6 + 6 O2 6 CO2 + Light energy → C6H12O6 + 6 O2 + 6 H2O

which types of organisms carry out cellular respiration? Is it heterotrophs, autotrophs,or both?

Can the Calvin cycle occur in the dark?

Photosynthesis Takes in CO2 Converts H2O to O2 found only in photoautotrophs produces organic molecules

cellular respiration

Autotrophs use the_____ to make organic molecules. A) NADPH B) organic molecules C)light reactions D)Energy E)NADH F) Electrons G) Calvin Cycle H)o2 I) Plant pigments J)ATP

o2 Is produced in the____ A) NADPH B) organic molecules C)light reactions D)Energy E)NADH F) Electrons G) Calvin Cycle H)o2 I) Plant pigments J)ATP

The light reactions involve a series of____ conversions A) NADPH B) organic molecules C)light reactions D)Energy E)NADH F) Electrons G) Calvin Cycle H)o2 I) Plant pigments J)ATP

An electron carrier called_____ drives the Calvin cycle. A) NADPH B) organic molecules C)light reactions D)Energy E)NADH F) Electrons G) Calvin Cycle H)o2 I) Plant pigments J)ATP

H2o provides___ for light reactions. A) NADPH B) organic molecules C)light reactions D)Energy E)NADH F) Electrons G) Calvin Cycle H)o2 I) Plant pigments J)ATP

Role of plant pigments in photosynthesis Which best explains the role of plant pigments in photosynthesis? Convert heat to electricity Provide electrons Absorb light energy Produce photon energy Reduce NADP

Which has a higher energy,gamma rays or radio waves?

what type of reaction am I?ATP is a product NADPH is a product Oxidation of water

Calvin cycle ATP is consumed Reduction by NADPH Reduction of carbon compounds

Example of carbon fixation Which best represents an example of carbon fixation? The oxidation of NADPH to form NADP. The reduction of carbohydrates by NADPH. The regeneration of RuBP. The conversion of 1,3-BPG into G3P. The incorporation of CO2 into organic molecules.

Role of rubisco in the Calvin cycle What is the role of rubisco in the Calvin cycle? The production of O2 from CO2. The conversion of G3P into glucose. The formation of G3P. The regeneration of RuBP. As a catalyst to add CO2 onto RuBP.

what type of plant am I? sensitive to photorespiration Produces 3-phosphoglycerate

C4 plants

found in desert plants makes crassulacean acid

Photosynthesis uses____ to produce ATP,NADPH,and O2. A)light reactions B)light energy C)chlorophyll D)Calvin cycle E)carbon fixation

_____captures the light energy for photosynthesis A)light reactions B)light energy C)chlorophyll D)Calvin cycle E)carbon fixation

ATP and NADPH drive the _____ A)light reactions B)light energy C)chlorophyll D)Calvin cycle E)carbon fixation

The calvin cycle performs___ during photosynthesis. A)light reactions B)light energy C)chlorophyll D)Calvin cycle E)carbon fixation

Water is converted to oxygen and releases electrons in the____ A)light reactions B)light energy C)chlorophyll D)Calvin cycle E)carbon fixation

Effect of atrazine on photosynthesis Atrazine is an herbicide that competes with Q (plastoquinone) for the electrons that are released from Photosystem II after it is struck by light. Which of the following products of the light reaction would atrazine prevent from forming? ATP NADPH ATP and oxygen ATP and NADPH NADPH and oxygen

Effect of paraquat on photosynthesis Paraquat is an herbicide that competes with FD (Ferredoxin) for the electrons that are released from Photosystem I after it is struck by light. Which of the following products of the light reaction would paraquat prevent from forming? NADPH ATP and oxygen ATP NADPH and oxygen NADPH and ATP

The electrons excited by sunlight are replaced by electrons from... A mutation in plant photosystem I allows it to accept electrons from photosystem II but prevents the electrons from being excited by sunlight. The likely effect on the plant from this mutation is more ATP and less NADPH is produced. more ATP and more NADPH is produced. less ATP and less NADPH is produced. less ATP and more NADPH is produced.

Photosynthetic pigments are clustered together to form photosystems Photosynthetic pigments are found in the plasma membrane of a plant cell. True False

Plastoquinone is the primary electron acceptor for electrons leaving Plastoquinone is the primary electron acceptor for electrons leaving photosystem II. True False

The Calvin Cycle takes place in the ________ of chloroplasts. matrix stroma thylakoid membrane inner membrane outer membrane

The Calvin Cycle uses ________, which are products of the light reactions of photosynthesis. CO2 and H2O RuBP and O2 ADP and NADH ATP and NADPH 3-phosphoglycerate and glucose

Predict what would happen to the Calvin cycle if RuBP was a 4-carbon molecule able to accept a single CO2 molecule. The Calvin cycle would require more ATP and NADPH to produce the same amount of glucose. The Calvin cycle would require less ATP and NADPH to produce the same amount of glucose. The Calvin cycle would require the same amount of ATP and NADPH to produce the same amount of glucose. The Calvin cycle would be unaffected.

How many times must the Calvin cycle turn to produce 10 glucose molecules? 10 120 20 30 60

Number of times the Calvin cycle turns to produce... How many turns of the Calvin cycle are needed to produce 30 molecules of glyceraldehyde-3-phosphate? 90 30 180 120 60

The water necessary for photosynthesis A. Is split into h2 and o2 b. Is directly involved in the synthesis f carbohydrates C. Provides the electrons to replace lost electrons in photosystem ll. d. provides h+ needed to synthesize G3P e. does non of the above

The reaction center oigment differs from the other pigment molecules of the light-harvesting complex in that a. the reaction center pigment carotenoid. b.the reaction center pigment absorbs light energy and transfes that engery to other molecules without the transfer of electrons c. the reaction center pigment does not transfer excited electrons to the primary electron acceptor e. the reaction center acts as an ATP synthase to produce ATP

the cyclic electron flow that occurs via photosystem l produces a.NADPH b. oxygen c.ATP D. all of the above E. a and c only

during noncyclic electron flow, the high-energy electron from P680 a. eventually moves to NADP+ b. becomes incorporated in water molecules c.is pumped into the thylakoid space to drive ATP production d. provides the energy necessary to split water molecules. e.falls back to the low-energy state in photosystem ll

During the first phase of the Calvin cycle, carbon dioxide is incorporated into ribulose bisphospahate (RuBP) by a. oxaloacetate b.rubisco c.RuBP d.quinone e.G3P

The NADPH produced durin the light reactions is necessary for a the carbon fixation phase, which incorporates carbon dioxide into an organic molecule of the calvin cycle b. the reduction phase,which produces carbohydrates in the calvin cycle c. the regeneration of RuBP of the calvin cycle d. all of the above e. a and b only

the majority of the G3P produced during the reduction and carbohydrate production pase is used to produce a.glucose b.ATP c.RuBP to continue the cycle.rubisco d.rubisco e.all of the above

Photorespiration a.is a process where plants use sunlight to make ATP b.b.is an inefficient way plants can produce organic molecules and in the process uses 02 and release CO2 c.is a process that plants use to convert light energy to NADPH d.occurs in the thykoid lumen e.is the normal process of carbohydrate production in cool moist enviroments.

Photorespiration is avoided in C4 plants because a. these plants separate the formation of a four-carbon molecule from the rest of the Calvin cycle in different cells. b. these plants carry out only anaerobic respiration c, the enzyme PEP functions to maintain high CO2 concentrations in the bundle-sheath cells. d. all of the above e.a and c only

Plants commonly found in hot and dry environments that carry out carbon fixtation at night are a.oak trees b.c3 plants c. CAM plants d.all of the above e. A and b only