Biology Mock Tests, Practice Questions

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Class 11

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300 questions

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Sample Questions

NEET Biology

Which of the following criteria must be met for a region to be classified as a biodiversity hotspot by Conservation International?

A Contains at least 1500 species of vascular plants (>0.5% endemic) and has lost at least 50% of its original habitat

B Contains at least 1500 species of vascular plants (>30% endemic) and has lost at least 70% of its original habitat

C Contains at least 1000 species of all types and has lost at least 30% of its original habitat

D Contains at least 500 endemic species and has lost at least 90% of its original habitat

NEET Biology

The volume of air remaining in the lungs after a forced expiration is called:

A Tidal volume

B Residual volume

C Vital capacity

D Functional residual capacity

NEET Biology

Which of the following is the correct statement about the Hardy-Weinberg equation p² + 2pq + q² = 1?

A p² represents frequency of homozygous dominant genotype, 2pq represents heterozygous genotype, q² represents homozygous recessive genotype

B p² represents frequency of heterozygous genotype, 2pq represents homozygous dominant, q² represents homozygous recessive

C p and q represent genotype frequencies, not allele frequencies

D p² + 2pq + q² = 1 applies only to sex-linked genes

Class 12 Biology

In nitrogen assimilation, the reduction of ammonium (NH₄⁺) to organic nitrogen occurs primarily through the GS-GOGAT pathway, where:

A Glutamine synthetase (GS) incorporates NH₄⁺ into glutamate to form glutamine, and GOGAT transfers the amino group to α-ketoglutarate

B Nitrate reductase converts NH₄⁺ directly into amino acids without any intermediate compounds

C Rubisco fixes NH₄⁺ in the Calvin cycle, replacing its normal role in CO₂ fixation

D ATP synthase uses the proton gradient to directly phosphorylate glutamate into glutamine

Class 12 Biology

In the process of decomposition, which group of organisms is primarily responsible for breaking down detritus?

A Herbivores

B Bacteria and fungi

C Detritivores like earthworms only

D Primary consumers

NEET Biology

Which type of joint in the human body allows movement in only one plane (uniaxial movement), such as bending and straightening?

A Saddle joint (e.g., thumb carpometacarpal joint)

B Hinge joint (e.g., elbow joint)

C Ball and socket joint (e.g., shoulder joint)

D Pivot joint (e.g., atlantoaxial joint)

Class 11 Biology

Which structure is present in eukaryotic cells but absent in prokaryotic cells?

A 70S ribosomes

B Circular DNA

C Membrane-bound nucleus

D Peptidoglycan cell wall

NEET Biology

In an aquatic ecosystem, the pyramid of biomass is generally:

A Upright

B Inverted

C Spindle-shaped

D Square-based pyramid

About Biology Mock Tests

Biology covers anatomy, genetics, ecology, cell biology, physiology, botany, zoology, and life sciences across all class levels and competitive examinations. Practice with comprehensive biology questions aligned with NCERT curriculum and NEET exam pattern, covering topics from cell structure to ecosystems, human physiology to biotechnology.

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