(A) In purple bacteria,photosynthesis utilizes infrared light with wavelengths longer than $700\, nm$ (typically around $800-900\, nm$).These bacteria

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(A) In purple bacteria,photosynthesis utilizes infrared light with wavelengths longer than $700\, nm$ (typically around $800-900\, nm$).These bacteria contain bacteriochlorophyll as the primary pigment.The reaction centre in these purple bacteria is known as $B-890$,which absorbs light at this specific wavelength.Therefore,both the Assertion and the Reason are correct,and the Reason correctly explains why these bacteria can utilize wavelengths longer than $700\, nm$.

Class 11 Biology Photosynthesis in Higher Plants Mix Examples- Photosynthesis in Higher Plants

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Assertion: Bacterial photosynthesis occurs by utilizing wavelength longer than $700\, nm$.
Reason: Here reaction centre is $B-890$.

AIIMS 2002 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

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Photosynthesis in Higher Plants

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Mix Examples- Photosynthesis in Higher Plants

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Choose the incorrect sentences for chloroplast.
$(1)$ The chloroplast membranous system consists of grana and the fluid stroma.
$(2)$ Pigments are present in the stroma.
$(3)$ In the stroma,enzymatic reactions incorporate $CO_2$ into the plant,leading to the synthesis of sugar.
$(4)$ Light is not required for the formation of sugar in the stroma.

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The energy of a mole of light quanta is $72 \ kcal$ in the blue region at $400 \ nm$ and $41 \ kcal$ in the red region at $700 \ nm$. How much light energy would be required under standard conditions to make $1 \ mole$ of glucose costing $686 \ kcal$?

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$A -$ Productivity of $C_3$ plants is higher than $C_4$ plants.
$R -$ Photorespiration occurs in $C_3$ plants.

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Name the two important enzymes of $C_3$ and $C_4$ pathways, respectively. What important role do they play in fixing $CO_2$?

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In which of the following cell organelles do both photo-chemical and thermo-chemical reactions occur?

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Assertion: Bacterial photosynthesis occurs by utilizing wavelength longer than $700\, nm$.Reason: Here reaction centre is $B-890$.

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The energy of a mole of light quanta is $72 \ kcal$ in the blue region at $400 \ nm$ and $41 \ kcal$ in the red region at $700 \ nm$. How much light energy would be required under standard conditions to make $1 \ mole$ of glucose costing $686 \ kcal$?

$A -$ Productivity of $C_3$ plants is higher than $C_4$ plants.$R -$ Photorespiration occurs in $C_3$ plants.

Name the two important enzymes of $C_3$ and $C_4$ pathways, respectively. What important role do they play in fixing $CO_2$?

In which of the following cell organelles do both photo-chemical and thermo-chemical reactions occur?

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Assertion: Bacterial photosynthesis occurs by utilizing wavelength longer than $700\, nm$.
Reason: Here reaction centre is $B-890$.

$A -$ Productivity of $C_3$ plants is higher than $C_4$ plants.
$R -$ Photorespiration occurs in $C_3$ plants.