Chapter 8 Photosynthesis Study Guide

Accessory pigments within chloroplasts are responsible for

absorbing photons of different wavelengths of light and passing that energy to P680 or P700

Rubisco is the enzyme that

adds CO2 to RuBP in the carbon fixation stage

The disaccharide sucrose is the form of carbohydrate transported throughout a plant body. How many turns of the Calvin cycle does it take to produce one molecule of sucrose?

12

Chloroplasts could make carbohydrate in the dark if provided with

ATP, NADPH, and CO2

Photosynthesis is a redox process in which

CO2 is reduced and water is oxidized

Which of the following processes or structures is mismatched with its location? a) light reactions--grana b) electron transport chain--thylakoid membrane c) Calvin cycle--stroma d) ATP synthase--double membrane surrounding chloroplast e) splitting water--thylakoid space

D

Which of the following statements is false? a) When isolated chlorophyll molecules absorb photons, their electrons fall back to ground state, giving off heat and light b) Accessory pigments and photorespiration may contribute to photorespiration, protecting plants from the detrimental effects of intense light c) In linear electron flow in the light reactions, the electron transport chain pumps H+ across a membrane, creating a proton-motive force used in ATP synthesis d) In both photosynthetic prokaryotes and eukaryotes, ATP synthases catalyze the production of ATP within the cytosol of the cell e) In sulfur bacteria, H2S is the hydrogen (and thus electron) source for photosynthesis

D

Which of the following parts of an illuminated plant cell would you expect to have the lowest pH? a) nucleus b) cytosol c) chloroplast d) stroma of chloroplast e) thylakoid space

E

Which of the following substances is/are the final electron acceptors for the electron transport chains in the light reactions of photosynthesis and in cellular respiration? a) O2 in both b) CO2 in both c) H2O in the light reactions, and O2 in respiration d) NADP+ in the light reactions, and NAD+ or FAD in respiration e) NADP+ in the light reactions, and O2 in respiration

E

Chemiosmotic synthesis of ATP occurs during

both respiration and phososynthesis

A difference between electron transport in photosynthesis and respiration is that in photosynthesis

light provides the energy to push electrons to the top of the electron chain, rather than energy from the oxidation of food molecules

Oxidation of NADP+ occurs during

neigher respiration nor photosyntheis

In green plants, most of the ATP for synthesis of proteins, cytoplasmic streaming, and other cellular activities comes directly from

oxidative phosphorylation

Reduction of CO2 occurs during

photosynthesis

In photosynthesis, the splitting of water

provides electrons that reduce NADP+ to NADPH

Reduction of NAD+ occurs during

respiration

Reduction of oxygen occurs during

respiration

A spectrophotometer can be used to measure

the absorption spectrum of a substance

Both NADPH and ATP from the light reactions are needed

to reduce 3-phosphoglycerate to G3P