Electron transport system - class-XI
Electron transport system
Questions
Which statement is correct for given reaction for photosynthesis?
$2H _2A+CO _2\overset{light}{\rightarrow}2A+CH _2O+H _2O$.
- H donor is oxidisable substrate
- $O _2$ evolve from $H _2O$ if reducible compound is $H _2O$
- Glucose gain its oxygen from $H _2O$
- $(1)$ & $(3)$ both
Find out correct simplified equation of photosynthesis
- $\displaystyle CO _2 + 2H _2O \displaystyle
\overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } C _5H _{10}O _4 + H _2O + O _2 \uparrow$ - $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } (CH _{2}O) _n + H _2O + O _2 \uparrow$
- $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } (CH _{2}O) _n + O _2 \uparrow$
- $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } C _3H _{6}O _3 + CO _2 + O _2 \uparrow$
- $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } C _6H _{12}O _6 + O _2 \uparrow$
What is the common between photosynthesis and respiration
- cytochrome
- Light
- $H _{2}O$
- Temperature
Splitting of water molecules during light reaction of photosynthesis is associated with
(a) PS I resulting in the release of $O _2$, protons and transfer of electrons to PS II (b) PS II resulting in release of $O _2$, protons and transfer of electrons to PS I (c) PS II resulting in release of $O _2$, protons and transfer of electrons to PS II (d) PS I resulting in the release of $O _2$, protons and transfer of electrons to PS I.
Of the above statements
- a alone is correct
- b alone is correct
- c alone is correct
- d alone is correct
- b and c are correct.
The source of oxygen evolved during photosynthesis is
- $H _2O$
- $C _6 H _{12} O _6$
- $CO _2$
- $n(CH _2O)$.
Photolysis of water is a result of action of?
- Mg and Cl
- N, Cu and Mg
- Ca and Mg
- Ca, Mn and Cl
A copper containing protein linking electron transfer between PS II and PS I is?
- Cytochrome $a3$
- Cytochrome b
- Plastocyanin
- Plastoquinone
During light reaction, as electrons move through photosystems, protons are transported across the membrane. This happens because of __________________.
- The primary acceptor of $e^-$(located towards the outer surface of the membrane) transfers its electron not to the $e^-$ carrier but to H carrier
- The primary acceptor of $e^-$ transfers only its $e^-$ to $e^-$ carrier.
- The primary acceptor of $e^-$ transfers only its $H^+$ to the nearest carrier.
- NADP - reductase is present in grana
- Outer membrane
- Inter membrane space
- Inner membrane
- Matrix
Cyclic photophosphorylation takes place in the thylakoid which lacks:
- Electron transport system
- Enzyme FNR(ferredoxin NADP reductase )
- Lumen
- Photosystem with absorption peak $700nm$
Consider the following events in the photochemical conversion of light energy into chemical energy by chlorophyll during photosynthesis.
a. Charge separation
b. Absorption of a quantum of energy
c. Ejection of electron
d. Transfer of light energy
The correct sequence of these events is?
- $4, 2, 1, 3$
- $4, 2, 3, 1$
- $2, 4, 1, 3$
- $2, 4, 3, 1$
- 100-390
- 390-430
- 400-700
- 760-10,000