Which of the following evidence indicates that the oxygen released during photosynthesis is derived from water?
- AIn photosynthesis,the isotope $(O^{18})$ oxygen is provided in the form of $H_2O$,which releases $O_2$.
- BIn the absence of $CO_2$,if potassium ferricyanide or other reducing agents are provided,isolated chloroplasts in water will release $O_2$.
- CPhotosynthetic bacteria use $H_2S$ and $CO_2$ to produce carbohydrates,water,and sulfur.
- DAll of the above
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Read the following four statements ($a, b, c,$ and $d$) carefully and select the option that includes both correct statements.
$(A)$ The $Z$-scheme of light reaction occurs only in the presence of $PSI$.
$(B)$ Only $PSI$ is functional in cyclic photophosphorylation.
$(C)$ Cyclic photophosphorylation results in the synthesis of $ATP$ and $NADPH_2$.
$(D)$ Stroma lamellae lack both $PS-II$ and $NADP$ reductase $(FNR)$.
$(A)$ The $Z$-scheme of light reaction occurs only in the presence of $PSI$.
$(B)$ Only $PSI$ is functional in cyclic photophosphorylation.
$(C)$ Cyclic photophosphorylation results in the synthesis of $ATP$ and $NADPH_2$.
$(D)$ Stroma lamellae lack both $PS-II$ and $NADP$ reductase $(FNR)$.
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View SolutionExplain the information about the discovery of $C_3$ and $C_4$ pathways.
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View SolutionWhat is the unique process which has supported life on this planet?
Medium
View SolutionWhich of the following statements with regard to photosynthesis is/are correct?
$I$. In $C_{4}$-plants,the primary $CO_{2}$ acceptor is $PEP$.
$II$. In the photosynthetic process,$PS-II$ absorbs energy at or just below $680 \;nm$.
$III$. The pigment that is present in the Pigment System-$I$ is $P680$.
$I$. In $C_{4}$-plants,the primary $CO_{2}$ acceptor is $PEP$.
$II$. In the photosynthetic process,$PS-II$ absorbs energy at or just below $680 \;nm$.
$III$. The pigment that is present in the Pigment System-$I$ is $P680$.
Medium
View SolutionWater is
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