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Biology

Get the best Biology MCQs with answers and explanations for exam preparation and job tests. Our collection covers cell biology, genetics, human physiology, plant biology, microbiology, biotechnology, and environmental science. These Biology multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and medical admission tests. Practice online to improve your concepts and score higher with our updated and comprehensive Biology MCQs.

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11. Which of the following represents osmoregulatory steps taken by hydrophytes?

September 14, 2025 by Admin
Increases transpiration by increasing the surface area of the leave.
Small and thick leaves to decrease the surface area proportional to the volume of the leave.
Stomata closing in a sufficient supply, and opening in a restricted supply of water.
None of these
✅ The correct answer is option A.
Categories Biology, Homeostasis MCQs Tags Biology MCQs, Homeostasis MCQs Leave a comment

12. A typical human chromosome contains _________ nucleotides in its DNA

September 14, 2025 by Admin
240 million
140 million
150 million
160 million
✅ The correct answer is option B.
Categories Biology, Chromosome and DNA MCQs Tags Biology MCQs, Chromosome and DNA MCQs Leave a comment

13. In plants, water potential is determined by major factors.

September 14, 2025 by Admin
Three
Four
Two
Five
✅ The correct answer is option C.
Categories Biology, Transport MCQs Tags Biology MCQs, Transport MCQs Leave a comment

14. Thick, waxy & leathery cuticle around leaves is present in

September 14, 2025 by Admin
Hydrophytes
Mesophytes
Xerophytes
Halophytes
✅ The correct answer is option C.
Categories Biology, Homeostasis MCQs Tags Biology MCQs, Homeostasis MCQs Leave a comment

15. Histones have an abundance of amino acids

September 14, 2025 by Admin
Valine and lysine
Arginine and lysine
Valine and arginine
Histidine and threonine
✅ The correct answer is option B.
Categories Biology, Chromosome and DNA MCQs Tags Biology MCQs, Chromosome and DNA MCQs Leave a comment

16. Which character differentiates living things from non-living organisms?

September 14, 2025 by Admin
They live in the same ecosystem.
They are acted upon by the same environment
They are highly organized and complex made of one or more cells and contain genetic material
Both a and b
✅ The correct answer is option C.
Categories Biology, Biology Introduction MCQs Tags Biology Introduction MCQs, Biology MCQs Leave a comment

17. Rose is an example of

September 14, 2025 by Admin
Hydrophytes
Mesophytes
Xerophytes
Halophytes
✅ The correct answer is option B.
Categories Biology, Homeostasis MCQs Tags Biology MCQs, Homeostasis MCQs Leave a comment

18. A torsion of chromatin that is condensed only during cell division is

September 14, 2025 by Admin
Euchromatin
Heterochromatin
Biochromatin
Nucleochromatin
✅ The correct answer is option A.
Categories Biology, Chromosome and DNA MCQs Tags Biology MCQs, Chromosome and DNA MCQs Leave a comment

19. The study of fossils is called:

September 14, 2025 by Admin
Environmental Biology
Historical biology
Palaeontology
Social biology
✅ The correct answer is option C.
Categories Biology, Biology Introduction MCQs Tags Biology Introduction MCQs, Biology MCQs Leave a comment

20. Most of the marine invertebrates are

September 14, 2025 by Admin
Osmoconformers
Osmoregulators
Both depend upon the concentration of sea water
None of these
✅ The correct answer is option A.
Categories Biology, Homeostasis MCQs Tags Biology MCQs, Homeostasis MCQs Leave a comment
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