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Electron transport system - class-XI

Description: Electron transport system
Number of Questions: 15
Created by:
Tags: photosynthesis botany biology photosynthesis in higher plants
Attempted 0/14 Correct 0 Score 0

Which statement is correct for given reaction for photosynthesis?
$2H _2A+CO _2\overset{light}{\rightarrow}2A+CH _2O+H _2O$.

  1. H donor is oxidisable substrate

  2. $O _2$ evolve from $H _2O$ if reducible compound is $H _2O$

  3. Glucose gain its oxygen from $H _2O$

  4. $(1)$ & $(3)$ both


Correct Option: A

Find out correct simplified equation of photosynthesis

  1. $\displaystyle CO _2 + 2H _2O \displaystyle

    \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } C _5H _{10}O _4 + H _2O + O _2 \uparrow$

  2. $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } (CH _{2}O) _n + H _2O + O _2 \uparrow$

  3. $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } (CH _{2}O) _n + O _2 \uparrow$

  4. $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } C _3H _{6}O _3 + CO _2 + O _2 \uparrow$

  5. $\displaystyle CO _2 + 2H _2O \overset { light \, energy }{ \underset { chlorophyll }{ \longrightarrow } } C _6H _{12}O _6 + O _2 \uparrow$


Correct Option: B

What is the common between photosynthesis and respiration

  1. cytochrome

  2. Light

  3. $H _{2}O$

  4. Temperature


Correct Option: A
Explanation:

Cytochromes-Hence protein serving as electron carries in respiration photosynthesis and other oxidative reactions.

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

  1. a alone is correct

  2. b alone is correct

  3. c alone is correct

  4. d alone is correct

  5. b and c are correct.


Correct Option: B

A genetically dwarf plant can be converted into a tall plant by the use of 

  1. Kinetin

  2. $GA _{3}$

  3. IAA/X-rays

  4. 2, 4-D


Correct Option: B
Explanation:

GA is sprayed on these single gene dwarf plants, genetic dwarfism is overcome and plants become long e.g., maize, pea.

The source of oxygen evolved during photosynthesis is

  1. $H _2O$

  2. $C _6 H _{12} O _6$

  3. $CO _2$

  4. $n(CH _2O)$.


Correct Option: A
Explanation:
In the light reaction, the splitting of water occurs. The protons and oxygen formed by splitting of water are released within the lumen of the thylakoid. The oxygen produced is released as one of the net products of photosynthesis.
So, the correct option is 'H$ _2$O' 

Photolysis of water is a result of action of?

  1. Mg and Cl

  2. N, Cu and Mg

  3. Ca and Mg

  4. Ca, Mn and Cl


Correct Option: A

A copper containing protein linking electron transfer between PS II and PS I is?

  1. Cytochrome $a3$

  2. Cytochrome b

  3. Plastocyanin

  4. Plastoquinone


Correct Option: A

During light reaction, as electrons move through photosystems, protons are transported across the membrane. This happens because of __________________.

  1. 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

  2. The primary acceptor of $e^-$ transfers only its $e^-$ to $e^-$ carrier.

  3. The primary acceptor of $e^-$ transfers only its $H^+$ to the nearest carrier.

  4. NADP - reductase is present in grana


Correct Option: A

What does ionosphere shell consist of?

  1. Electrons

  2. Neutrons

  3. Protons

  4. atom


Correct Option: A
Electron Transport System (ETS) is located in mitochondrial
  1. Outer membrane

  2. Inter membrane space

  3. Inner membrane

  4. Matrix


Correct Option: C
Explanation:

An electron transport system (ETS) or electron transport chain (ETC) is a series of coenzymes and cytochromes that take part in the passage of electrons from one carrier to another and to its ultimate acceptor. The various components of ETS are arranged in five kinds of complexes, arranged in a definite sequence in the inner mitochondrial membrane.

So the correct option is C.

Cyclic photophosphorylation takes place in the thylakoid which lacks:

  1. Electron transport system

  2. Enzyme FNR(ferredoxin NADP reductase )

  3. Lumen

  4. Photosystem with absorption peak $700nm$


Correct Option: A
Explanation:

Cyclic Photophosphorylation is the process, in which systems (like prokaryotes), just accomplishes the ADP to ATP for immediate energy for the cells. This type of photophosphorylation usually occurs in the thylakoid membrane. So the correct option is ' Electron transport system'.

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?

  1. $4, 2, 1, 3$

  2. $4, 2, 3, 1$

  3. $2, 4, 1, 3$

  4. $2, 4, 3, 1$


Correct Option: A
Which range of wavelength (in nm) is called photosynthetically active radiation (PAR)? 
  1. 100-390

  2. 390-430

  3. 400-700

  4. 760-10,000


Correct Option: C
Explanation:

Sunlight or solar radiations reaching the earth have wavelength between 300 nm (in the ultra volt rang) to 2600 nm (in the infa-red range). Part of the spectrum used in photosynthesis has a wavelength between 400-700 nm, it is called as photo synthetically active radiation (PAR). 

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