Photosynthesis in Higher Plants-Biology Revision Notes

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1. OUR PRODUCTS
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2. QUESTIONS ANSWERS
Process in which light energy is converted into chemical | Physico-chemical
energy (organic compounds) is called process e.g
Photosynthesis
‘An experimental setup to show that CO; is essential for. | Mol's half leaf
photosynthesis is experiment

First ofall who demonstrate that sunlight is essential for
photosynthesis in plants

Jan Ingenhousz

Production of glucose takes place in green part of plant
is established by

JV. Sachs

A first action spectrum of photosynthesis was described
by

T.W.Engelmann

Name the algae which was used to describe action
spectrum of photosynthesis.

Cladophora

Who demonstrate that photosynthesis is alight
dependent reaction in which hydrogen from a suitable
oxidisable compound reduces carbon dioxide to
carbohydrate

2H,A + CO2— 2A + CH)0 + H,0

‘Also conclude , evolve during photosynthesis comes
from water not from carbon dioxide.

C.V. Niel

Name the pigment(s) which increases the absorption
range for photosynthesis

Chlorophylib,
xanthophylls and

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‘carotenoids

Where are the protons and O; , formed during splitting of | In lumen of thylakoid
water, likely to be released.

Synthesis of ATP from ADP and inorganic phosphate in | Photophosphorylation
presence of light is known as

Identify the A in the given figure of ight reaction ‘A= Electron transport
system
‘Write the requirements for chemiosmotic ATP synthesis | Membrane
Proton pump
Proton gradient
ATPase
Name of the place where accumulation of protons occur | Thylakoid lumen and
during chemiosmosis in chloroplast and mitochondria | intermembrane space of
respectively, mitochondria,
The phase that leads to synthesis of food (sugar) in Biosynthetic phase
photosynthesis is called.
The first stable product of Calvin cycle is 3PGA
The first stable product in pathway is DAA

How many Calvin cycles are required for formation of | 6 cycles,
one glucose ?

How many ATP and NADPH will be required to make | 18 ATP and 12 NADPH
‘one glucose through the Calvin pathway?

‘When in plant leaves, chloroplast containing bundie | Kranz anatomy (Ca
sheath cells surrounds vascular bundles in several Plants)
layers that anatomy is known as
Write the characteristics of Bundle sheath cells of C | Large number of
plants chloroplast Thick walls
impervious to gaseous
‘exchanges
no intercellular spaces
Give the example of c4 plants Sugarcane, Maize and
Sorghum

Write the enzyme which is present most abundantlyin | RuBisCO
the world

For which substrate RuBisCO shows greater affinity ? | COs
Name the products of photorespiration which are the | Phosphoglycerate and

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