Biology and Human Body PYQs with Explanations
Concept revision + 10 clickable questions + detailed explanations
This lesson converts recurring previous-paper concepts into an exam-ready revision set. Question wording is independently rewritten for clarity; explanations are original; and official APPSC, UPSC, SSC and RRB repositories are linked for verification.
Topic Focus
Cells, organelles, hormones, blood, vitamins, vectors and human physiology.
Rapid Answer Map
| No. | Question focus | Correct answer |
|---|---|---|
| 1 | The basic structural and functional unit of life is the: | Cell |
| 2 | The “powerhouse of the cell” is the: | Mitochondrion |
| 3 | Photosynthesis occurs mainly in the: | Chloroplasts |
| 4 | The principal hereditary material in most organisms is: | DNA |
| 5 | Insulin is secreted by the: | Pancreas |
| 6 | Haemoglobin is present mainly in: | Red blood cells |
| 7 | Deficiency of vitamin C causes: | Scurvy |
| 8 | Malaria is caused by: | Plasmodium protozoa |
| 9 | The principal mosquito vector of dengue is: | Aedes aegypti |
| 10 | The functional unit of the kidney is the: | Nephron |
10 Clickable MCQs
The basic structural and functional unit of life is the:
The cell is the basic unit of life.
The “powerhouse of the cell” is the:
Mitochondria generate much of the cell’s ATP through respiration.
Photosynthesis occurs mainly in the:
Chloroplasts contain chlorophyll and conduct photosynthesis.
The principal hereditary material in most organisms is:
DNA stores hereditary information in most organisms.
Insulin is secreted by the:
Beta cells of pancreatic islets secrete insulin.
Haemoglobin is present mainly in:
Haemoglobin in red blood cells transports oxygen.
Deficiency of vitamin C causes:
Vitamin C deficiency causes scurvy.
Malaria is caused by:
Malaria is caused by Plasmodium parasites and transmitted by female Anopheles mosquitoes.
The principal mosquito vector of dengue is:
Aedes aegypti is the main dengue vector.
The functional unit of the kidney is the:
The nephron filters blood and forms urine.
Common Exam Traps
Quick Revision Checklist
- 1. Cell — Organisms may be unicellular or multicellular.
- 2. Mitochondrion — They possess their own DNA.
- 3. Chloroplasts — They are found in plant and algal cells.
- 4. DNA — Some viruses use RNA as genetic material.
- 5. Pancreas — It helps regulate blood glucose.
- 6. Red blood cells — Iron is an important component of haem.
- 7. Scurvy — Rickets is associated mainly with vitamin D deficiency.
- 8. Plasmodium protozoa — Different Plasmodium species cause human malaria.
Frequently Asked Questions
Are these questions copied from coaching websites?
No. Questions are independently rewritten from recurring concepts in official paper repositories and standard sources.
Why is an exact exam year not shown beside every question?
An exam and year are shown only when the source can be checked reliably. This prevents incorrect PYQ attribution.
How should I use this page?
Attempt all questions once, study explanations, revise the answer map, and reattempt after two days.
Official Paper Sources
- APPSC – Question papers and final keys
- APPSC – Question papers of various notifications
- UPSC – Previous question papers
- SSC – Official portal and previous papers
- RRB – Official question/response notices
Source policy: Official repositories establish the tested concepts. Explanations and practice presentation here are original.
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