In the chloroplast, the stroma lamellae lack the ...
1. PS I & NADP reductase
2. PS II & PS I
3. NADP reductase enzyme & PS I
4. NADP reductase & PS II
Answers
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Electrons are not passed to NADP reductase; no NADPH2 is formed. Stroma lamellae lack PS II as well as NADP reductase enzyme while grana lamellae have both PS I and PS II.
Top answer
Z scheme of light reaction is noncyclic flow of an electron from PSII through quinone, cyt b6 f complex and plastocyanin to NADPH via PSI;it includes ...
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Statement :
(A) Z scheme of light reaction takes place in presence of PS-I only.
(B) Only PS-I is functional in cyclic photophosphorylaiton.
(C) Cyclic photophosphorylation results into synthesis of ATP and NADPH
.
(D) Stroma lamellae lack PS-II as well as NADP.
ANSWER
Z scheme of light reaction is noncyclic flow of an electron from PSII through quinone, cyt b
f complex and plastocyanin to NADPH via PSI;it includes both PSI and PSII. In cyclic photophosphorylation, electrons are passed from P700 of PS-I via electron transfer chain to back to P700 with the formation of ATP. It does not include PS II. Electrons are not passed to NADP reductase; no NADPH
is formed. Stroma lamellae lack PS II as well as NADP reductase enzyme while grana lamellae have both PS I and PS II. Thus, the correct answer is option B.
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