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Human physiology mcq
22/08/2026

Human physiology mcq

21/08/2026

Q.One primary spermatocyte produces how many spermatids?
A) 2
B) 3
C) 4
D) 8

21/08/2026

Q.S***matogenesis occurs in the:
A) Epididymis
B) Seminiferous tubules
C) Prostate gland
D) Vas deferens

S***matogenesisS***matogenesis is the process of formation of spermatozoa from spermatogonia in the seminiferous tubules...
21/08/2026

S***matogenesis

S***matogenesis is the process of formation of spermatozoa from spermatogonia in the seminiferous tubules of the te**es.

📌 Quick Flow:
S***matogonium → Primary S***matocyte → Secondary S***matocyte → S***matid → S***matozoa 🧬

🔹 Occurs in seminiferous tubules
🔹 Involves mitosis + meiosis + spermiogenesis
🔹 One primary spermatocyte ultimately forms 4 spermatozoa

📚 NCERT Class 12 Biology | Human Reproduction | NEET

***matogenesis ***mFormation ***matogonia ***matocyte ***matid ***matozoa

Food Web & Energy Flow A food web shows interconnected food chains in an ecosystem, while energy flows from one trophic ...
21/08/2026

Food Web & Energy Flow

A food web shows interconnected food chains in an ecosystem, while energy flows from one trophic level to the next.

📌 Quick Points:
🔹 Sun → Producers → Consumers → Decomposers
🔹 Energy flow is unidirectional ☀️➡️🌱➡️🐇➡️🦅
🔹 Only about 10% of energy is transferred to the next trophic level
🔹 Food web → Multiple interconnected food chains

💡 Remember:
Energy flows, nutrients cycle. 🔄

📚 NCERT Class 12 Biology | Ecosystem | NEET

A plasmid is a small, circular, double-stranded extrachromosomal DNA molecule commonly found in bacteria.📌 Key Points:🔹 ...
21/08/2026

A plasmid is a small, circular, double-stranded extrachromosomal DNA molecule commonly found in bacteria.

📌 Key Points:
🔹 Replicates independently
🔹 Often carries antibiotic-resistance genes
🔹 Used as a vector in genetic engineering
🔹 Important in recombinant DNA technology

💡 Quick Trick:
Plasmid → Small + Circular + Extra-chromosomal DNA

📚 NCERT Class 12 Biology | Biotechnology | NEET

21/08/2026

Female Gamete vs S***m 🔬

Both are haploid gametes involved in sexual reproduction, but they differ greatly in size, structure and function.

🔹 Female Gamete (O**m) → Large, non-motile, nutrient-rich
🔹 S***m → Small, motile, streamlined
🔹 O**m → Usually one X chromosome
🔹 S***m → Carries either X or Y chromosome
🔹 O**m → Cytoplasm is abundant
🔹 S***m → Very little cytoplasm

💡 Quick Trick:
O**m → Large + Non-motile 🥚
S***m → Small + Motile 🧬

📚 NCERT Biology | Class 12 | Human Reproduction | NEET

***m **m

Plant kingdom study notes
21/08/2026

Plant kingdom study notes

Ecological Succession The gradual and orderly change in the species composition of a community over time, leading toward...
21/08/2026

Ecological Succession

The gradual and orderly change in the species composition of a community over time, leading towards a relatively stable climax community, is called ecological succession.

📌 Main Types:
🔹 Primary Succession → Starts on a bare area without soil
🔹 Secondary Succession → Begins in an area where a previous community existed and soil is already present

📌 General Sequence:
Pioneer species → Grasses → Shrubs → Trees → Climax community 🌳

📚 NCERT Class 12 Biology | Ecology | Ecosystem

20/08/2026

Q. Klinefelter syndrome is characterized by:
A) XO
B) XXY
C) XYY
D) ###

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