Photosynthesis in Higher Plants- Quiz 7

Where is the possible site for cyclic photophosphorylation?

• In PSII

• In Stroma

• In granal thylakoids / lamellae

• In stromal lamellae

Stromal lamellae lack –

• PSII

• PSI

• NADP reductase

• a and c

Photophosphorylation in a chloroplast is most similar to which of the following mitochondrial reactions?

• Oxidative phosphorylation

• Substrate level phosphorylation

• Hydrolysis

• None

Which statement about photosynthesis is false?

• In green plants PSI and PSII are required for the synthesis of NADPH + H⁺

• Photosynthesis is a redox process; H2O is oxidised, CO₂ is reduced

• Photosynthesis is a physio-chemical process

• None

Biosynthetic phase of photosynthesis needs –

• ATP, NADPH₂, CO₂ and H₂O

• Only CO₂

• Only ATP + NADPH₂

• Only O₂

Immediately after light becomes unavailable biosynthetic processes –

• Stop immediately

• Remain continued for ever

• Stop and then starts

• Continue for some time and then stops

The enzyme ATPase couples the synthesis of ATP to –

• The diffusion of protons

• The reduction of NADP⁺

• The excitation of Chl.

• Carbon dioxide fixation

The enzyme rubisco is found in –

• Chloroplast

• mitochondria

• Cytoplasm

• Nucleus

During carbon dioxide fixation / Calvin Cycle, CO₂ combines with –

• NADPH₂

• Water

• Ribulose biphosphate

• 3PGAld

The energy to hydrolyse water comes from –

• Oxidised chlorophyll

• Reduced Chl

• The proton gradient

• ATP