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11th Biology Weekly Test - 3 ( Bio - Botany - Photosynthesis )

MABS Institution

11th Biology Weekly Test - 3 ( Bio - Botany - Photosynthesis )-Aug 2020

Time : 1.00 Hours

Part - A

Multiple Choice Question - Answer All Question

Dicarboxylic Acid pathway refers to

C₃ pathway
C₄ pathway
C₂ pathway
CAM

Which chlorophyll molecule does not have a phytol tail?

Chl- a
Chl-b
Chl- c
Chl -d

______________is the first stable product of C₃ cycle.

DHAP
PGA
Succinic acid
fumaric acid

Identify the wrong statement:
(i) Chloroplasts contain 80s Ribosomes
(ii) Chloroplasts contain DNA.
(iii) Stromal lamellae has only PSI.
(iv) 5-30 grana are found in thylakoids

i and iii only
all the four
ii only
i and iv only

The correct sequence of flow of electrons in the light reaction is

PS II, plastoquinone, cytochrome, PS I, ferredoxin
PS I, plastoquinone, cytochrome, PS II ferredoxin
PS II, ferredoxin, plastoquinone, cytochrome, PS I
PS I, plastoquinone, cytochrome, PS II ferredoxin

The photosynthetic pathway is represented in a schematic representation. Mark the correct option.

It represents cactus plants where A occurs in the mesophyll & B in the bundle sheath cells
It represents sugarcane plants where A occurs in the mesophyll & B in the bundle sheath cells
It represents pineapple plants where both A & B occur in the mesophyll cells
It represents maize plants where A & B are separated only temporarily

The red pigment found in roses is_____________

carotene
phycoerythrin
phycobilin
lycopene

The intermediate from kreb's cycle which is used for chlorophyll production is___________.

Fumaric acid
Isocitric acid
Succinic acid
oxaloacetic acid

Identify the wrong statement

Emerson conducted experiment in chlorella
He used monochromatic light
He plotted a graph for O₂ yield at various wavelengths of light.
He found that the yield suddenly dropped in the region above 780nm

For every CO₂ molecule entering the C₃ cycle, the number of ATP & NADPH required

2ATP + 2NADPH
2ATP + 3NADPH
3ATP + 2NADPH
3ATP + 3NADPH

During dark respiration the end products are____________

O₂ and H₂O
H₂O only
CO₂
CO₂ and water

The correct sequence of flow of electrons in the light reaction is

PS II, plastoquinone, cytochrome, PS I, ferredoxin.
PS I, plastoquinone, cytochrome, PS II ferredoxin.
PS II, ferredoxin, plastoquinone, cytochrome, PS I.
PS II, plastoquinone, cytochrome, PS II, ferredoxin.

Assertion (A): Increase in Proton gradient inside lumen responsible for ATP synthesis
Reason (R): Oxygen-evolving complex of PS I located on thylakoid membrane facing Stroma, releases H⁺ ions

Both Assertion and Reason are True.
Assertion is True and Reason is False.
Reason is True and Assertion is False.
Both Assertion and Reason are False.

Glyceraldehyde 3 phosphate is an isomer of _____________

RUBP
OAA
DHAP
DPIP

The term Quantasome was coined by ____________.

Steinman
Emerson
Park and Biggins
Hatch and Slack

Identify true statement regarding the light reaction of photosynthesis?

Splitting of water molecule is associate with PS I.
PS I and PS II involved in the formation of NDPH + H⁺
The reaction center of PS I is Chlorophyll a with the absorption peak at 680 nm.
The reaction center of PS II is Chlorophyll a with the absorption peak at 700 nm.

The term quantosome was coined by________________.

Steinman
Emerson
Park and Beggins
Hatch and Slack

Identify incorrect pair regarding C₄cycle.

Initial carboxylation - mesophyll cells
Primary CO₂ acceptor - PEP
First product - OAA
Bundle sheath cells - with granum

__________ is involved in formation of chlorophyll.

Alanine
Valine
Glycine
Leucine

Identify Wrongly matched pair.

O₂ and H₂O
H₂O only
CO₂
CO₂ and water

Release of one electron from pigment system requires_____________ quanta of light.

4
2
3
6

Choose the plant showing CAM cycle.

Potato
Wheat
Opuntia
Maize

Identify the process that does not occur in Non cyclic photophosphorylation.

Photolysis of water
PSI and PSII are involved
Electrons are cycled back
ATP and NADPH + H⁺ are synthesized

For every CO₂ molecule entering the C₃ cycle, the number of ATP & NADPH required

2ATP+2NADPH
2ATP + 3NADPH
3ATP + 2NADPH
3ATP + 3NADPH

The creation of proton gradient across the thylakoid membrane is a result of

Decrease in proton number in stroma
Accumulation of protons in the lumen
Decrease in pH in the lumen
All of the above

_____________is considered to be a promising source of energy in future.

CNG
LPG
Methane
Hydrogen

Statement
1. RUBISCO has the most abundant protein on the earth.
II. RUBISCO has low affinity for CO₂ and O₂ and high affinity for RUBP
III. RUBISCO is also called diffraction I protein
IV. RUBISCO is also called fraction I protein

I only correct
II and III incorrect
II and IV correct
III only incorrect

Kranz anatomy is characteristic of _________ plants.

C₃
C₂
C₄
C₃ and C₄

Photosynthetic organisms use only______________ of incident solar light on earth

0.2 %
0.4 %
2 %
5 %

Kranz anatomy is one ofthe characteristics of the leaves of

Sugarcane
Wheat
Potato
Mustard

Red Drop experiment was done using___________.

Plant
Chlorella
Bacteria
Virus

1 complete light reaction involves ______________quanta of light.

50
46
48
40

The process of photosynthesis helps to fix ___________of carbon every year

75 x 10¹⁰kg
75 x 10⁸kg
75 x 10¹²kg
75 x 10¹⁸kg

Existence of light and dark reactions of photosynthesis was proved by_________.

Van Neil
Blackman
Emerson
Arnon

All carotenoid pigments have ___________carbon atoms.

30
40
50
20

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