Photosynthesis (OS8)

In autotrophic bacteria, where is chlorophyll located?

• in chloroplast membranes
• in chloroplast stroma
• in the ribosomes
• in the nucleoid
• in the infolded plasma membrane

If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), a later analysis will show that all of the following molecules produced by the algae contain 18O except

• 3-phosphoglycerate.
• glyceraldehyde 3-phosphate (G3P).
• glucose.
• ribulose bisphosphate (RuBP).
• O2.

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?

• CO2 and glucose
• H2O and O2
• ADP, Pi, and NADP+
• electrons and H+
• ATP and NADPH

Where does the Calvin cycle take place?

• stroma of the chloroplast
• thylakoid membrane
• cytoplasm surrounding the chloroplast
• interior of the thylakoid (thylakoid space)
• outer membrane of the chloroplast

In any ecosystem, terrestrial or aquatic, which of the following are always necessary?

• autotrophs and heterotrophs
• producers and primary consumers
• photosynthesizers
• autotrophs
• green plants

When oxygen is released as a result of photosynthesis, it is a direct by-product of

• reducing NADP+.
• splitting water molecules.
• chemiosmosis.
• the electron transfer system of photosystem I.
• the electron transfer system of photosystem II.

A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are being absorbed by this pigment?

• red and yellow
• blue and violet
• green and yellow
• blue, green, and red
• green, blue, and yellow

In the thylakoid membranes, what is the main role of the pigment molecules in a light-harvesting complex?

• split water and release oxygen to the reaction-center chlorophyll
• transfer light energy to the reaction-center chlorophyll
• synthesize ATP from ADP and Pi
• transfer electrons to ferredoxin and then NADPH
• concentrate photons within the stroma

Which of the following events occurs in the light reactions of photosynthesis?

• NADP is produced.
• NADPH is reduced to NADP+.
• Carbon dioxide is incorporated into PGA.
• ATP is phosphorylated to yield ADP.
• Light is absorbed and funneled to reaction-center chlorophyll a.

Which statement describes the functioning of photosystem II?

• Light energy excites electrons in the thylakoid membrane electron transport chain.
• Photons are passed along to a reaction-center chlorophyll.
• The P680 chlorophyll donates a pair of protons to NADP+, which is thus converted to NADPH.
• The electron vacancies in P680+ are filled by electrons derived from water.
• The splitting of water yields molecular carbon dioxide as a by-product.