Class 11 Biology — Chapter 8: Cell: The Unit of Life
60 practice questions · 20 Easy · 20 Medium · 20 Hard
Practise Class 11 Biology Chapter 8, "Cell: The Unit of Life", with 60 NCERT-aligned multiple-choice questions. The set is split into 20 Easy, 20 Medium and 20 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Cell: The Unit of Life" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Cell: The Unit of Life, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Biology mastery score. A few sample questions are shown below; sign in free to practise all 60.
Key concepts: Cell: The Unit of Life (Class 11 Biology)
This chapter covers the cell theory, prokaryotic and eukaryotic cells, and the structure and function of cell organelles.
- Cell theory
- All organisms are made of cells, the cell is the basic unit of life, and all cells arise from pre-existing cells.
- Prokaryotic vs eukaryotic
- Prokaryotes lack a nucleus and membrane-bound organelles; eukaryotes have both.
- Membrane & wall
- The fluid-mosaic plasma membrane controls transport; plant cells additionally have a cellulose cell wall.
- Organelles
- Mitochondria (energy), ER and Golgi (synthesis/packaging), lysosomes, ribosomes, plastids (in plants).
- Nucleus
- Contains chromatin (DNA) and the nucleolus; controls cell activities and heredity.
💡 Exam tips for Cell: The Unit of Life
- Mitochondria and chloroplasts are semi-autonomous (have their own DNA/ribosomes) — a common question.
- Ribosomes (70S in prokaryotes, 80S in eukaryotes) are the site of protein synthesis.
Sample questions
Cell theory was proposed by:
1838-39, later modified by Virchow.
Ribosomes are the site of:
mRNA is translated into proteins on ribosomes.
Lysosomes are known as:
Hydrolytic enzymes can digest the cell.
Cell: The Unit of Life — FAQs
What are the key concepts in Class 11 Biology Cell: The Unit of Life?+
This chapter covers the cell theory, prokaryotic and eukaryotic cells, and the structure and function of cell organelles. Key ideas include Cell theory, Prokaryotic vs eukaryotic, Membrane & wall, Organelles, Nucleus.
What does Class 11 Biology Chapter 8 (Cell: The Unit of Life) cover on XamBaaz?+
It covers 60 NCERT-aligned MCQs on "Cell: The Unit of Life" — 20 Easy, 20 Medium and 20 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Cell: The Unit of Life" questions free to practise?+
Yes — sign in with Google to practise "Cell: The Unit of Life" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Cell: The Unit of Life" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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