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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Photosystem II has molecules which absorbs maximum light of___________?

A 680 nm
B 100 m
C 700 nm
D 670 nm
Correct Answer: 680 nm

In all plants the major sites of phosynthesis are___________?

A Leaves respire and utilize O2 and release CO2.
B Stems
C Roots
D Branches
Correct Answer: Leaves respire and utilize O2 and release CO2.

Of the following, which one light – gathering?

A Antenna complex
B Reaction centre
C Photosystem
D None of these
Correct Answer: Antenna complex

Thylakoids in chloroplasts are stacked into___________?

A Grana
B Stroma
C Nucleus
D None of these
Correct Answer: Grana

NADPH2 provides___________?

A assimilatory power
B chemical energy
C energized electrons
D All of these
Correct Answer: All of these

Light reaction takes place on/in____________?

A Thylakoid
B Storma
C Chloroplast
D Grana
Correct Answer: Grana

Reduction in photosynthesis is of____________?

A O2
B CO2
C H2O
D light energy
Correct Answer: O2

Which of the following pigment is Blue- green in colour?

A Chlorophyll a
B Chlorophyll b.
C Chlorophyll c
D Chlorophyll d.
Correct Answer: Chlorophyll a

Stomata cover only ______________ of leaf surface?

A 0.03 – 0.04%
B 10%
C 1-2 %
D 50%
Correct Answer: 1-2 %

Molecular formula of chlorophyll ‘a’ molecule is___________?

A C55H72O5N4Mg
B C55H70O6N4Mg
C C50H72O6N4Mg
D C55H70O5N4Mg
Correct Answer: C55H72O5N4Mg
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