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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

What percentage of light reaching the earth is used in photosynthesis?

A 25%
B 10%
C 5%
D 1%
Correct Answer: 1%

The size of smallest virus is______________?

A 10 nm
B 20 nm
C 30 nm
D 40 nm
Correct Answer: 20 nm

The word virus is derived from Latin word venome meaning____________?

A Sweet fluid
B Sore Fluid
C Poisonous Fluid
D Salty Fluid
Correct Answer: Poisonous Fluid

The one which is present in all aerobic species is _________?

A Cytohrome c
B Cytochrome a
C Cytochrome a3
D Cytochrome b
Correct Answer: Cytohrome c

Competition between species will be greatest if they attempt to occupy the same___________?

A Ecosystem
B Community
C Habitat
D Niche
Correct Answer: Niche

Amoeba belongs to which kingdom______________?

A Prokaryotae
B Plantae
C Monera
D Protista
Correct Answer: Protista

Animals with greatest number of similarities are grouped together in a/an___________?

A Phylum
B Family
C Genus
D Order
Correct Answer: Genus

Other name for Kingdom monera is_______________?

A Protoctista
B Prokaryotae
C Archae
D None of these
Correct Answer: Prokaryotae

Which of the following relationship is NOT an example of symbiosis?

A Rhizobium and leguminous plants
B Marchantia sporophyte and gametophyte
C Algae and fungi in a lichen
D Mycorrhizal fungi and tree roots
Correct Answer: Marchantia sporophyte and gametophyte

In most ecosystems the greatest amount of energy flows through the____________?

A Secondary consumers
B Herbivores
C Carnivores
D Decomposers
Correct Answer: Herbivores
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