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CBSE
Class 9
Science
Exploration
Cell: The Building Block of Life

Question Bank

Practice Hub

Question Bank: Cell: The Building Block of Life

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Question Bank - Cell: The Building Block of Life

View all (77)
Q1.

What is the limit of resolution of the human eye?

Single Answer MCQ
Q-00171462
View explanation
Q2.

Which tool enhances the visibility of tiny cells beyond the human eye's capability?

Single Answer MCQ
Q-00171464
View explanation
Q3.

Who was the first person to observe cells under a microscope?

Single Answer MCQ
Q-00171466
View explanation
Q4.

What is the total magnification power if both eyepiece and objective lens have a magnifying power of 10X?

Single Answer MCQ
Q-00171468
View explanation
Q5.

To estimate the size of a cell, which measurement is essential to perform first?

Single Answer MCQ
Q-00171470
View explanation
Q6.

Which of the following is NOT a feature improved in modern microscopes?

Single Answer MCQ
Q-00171472
View explanation
Q7.

Which type of microscope uses a beam of electrons for imaging?

Single Answer MCQ
Q-00171474
View explanation
Q8.

When estimating cell size, if 25 cells fit across a 5000 μm field, what is the size of one cell?

Single Answer MCQ
Q-00171476
View explanation
Q9.

What does contrast in microscopy refer to?

Single Answer MCQ
Q-00171478
View explanation
Q10.

If a light microscope is set at a 40X objective lens, what is the magnification if the eyepiece is 10X?

Single Answer MCQ
Q-00171480
View explanation
Q11.

What type of lens is primarily used in light microscopes?

Single Answer MCQ
Q-00171481
View explanation
Q12.

In practical cell size estimation, what is the unit conversion used?

Single Answer MCQ
Q-00171482
View explanation
Q13.

What significant improvement allows scientists to view cells at the nanometre scale?

Single Answer MCQ
Q-00171483
View explanation
Q14.

What basic step is essential when using a microscope for observation?

Single Answer MCQ
Q-00171484
View explanation
Q15.

What does the term 'cell theory' primarily describe?

Single Answer MCQ
Q-00171485
View explanation
Q16.

In activity involving cell size estimation, why is it important to convert mm to μm?

Single Answer MCQ
Q-00171486
View explanation
Q17.

What process do cells undergo to grow and replace dead or damaged cells?

Single Answer MCQ
Q-00171487
View explanation
Q18.

Which type of cell division is most common in human body cells?

Single Answer MCQ
Q-00171488
View explanation
Q19.

What is a primary purpose of mitosis in organisms?

Single Answer MCQ
Q-00171490
View explanation
Q20.

During which phase do chromosomes duplicate for mitosis?

Single Answer MCQ
Q-00171492
View explanation
Q21.

How many daughter cells are produced at the end of mitosis?

Single Answer MCQ
Q-00171494
View explanation
Q22.

Which stage of the cell cycle includes cell growth and DNA replication?

Single Answer MCQ
Q-00171496
View explanation
Q23.

Which of the following processes occurs during anaphase in mitosis?

Single Answer MCQ
Q-00171498
View explanation
Q24.

The continuous division of certain cells, like skin cells, is an example of what?

Single Answer MCQ
Q-00171500
View explanation
Q25.

Which of these statements about mitosis is false?

Single Answer MCQ
Q-00171502
View explanation
Q26.

In which stage does the nuclear envelope break down?

Single Answer MCQ
Q-00171504
View explanation
Q27.

What is the main difference between mitosis and meiosis?

Single Answer MCQ
Q-00171506
View explanation
Q28.

Which type of cells typically undergo meiosis?

Single Answer MCQ
Q-00171508
View explanation
Q29.

Why is DNA replication essential before mitosis?

Single Answer MCQ
Q-00171510
View explanation
Q30.

Who proposed that all plants are made of cells?

Single Answer MCQ
Q-00171516
View explanation
Q31.

What statement is NOT part of the classical Cell Theory?

Single Answer MCQ
Q-00171517
View explanation
Q32.

What process explains how new cells form from existing cells?

Single Answer MCQ
Q-00171518
View explanation
Q33.

What did Rudolf Virchow contribute to Cell Theory?

Single Answer MCQ
Q-00171519
View explanation
Q34.

Which of the following statements best defines a cell?

Single Answer MCQ
Q-00171520
View explanation
Q35.

During which process do cells naturally die in a controlled manner?

Single Answer MCQ
Q-00171521
View explanation
Q36.

What is the significance of contact inhibition in cells?

Single Answer MCQ
Q-00171522
View explanation
Q37.

Prokaryotic cells lack which of the following?

Single Answer MCQ
Q-00171523
View explanation
Q38.

Eukaryotic cells are characterized by the presence of:

Single Answer MCQ
Q-00171524
View explanation
Q39.

What occurs when a cell loses the ability to undergo controlled division?

Single Answer MCQ
Q-00171525
View explanation
Q40.

Which subunit is considered the basic unit of life?

Single Answer MCQ
Q-00171526
View explanation
Q41.

The ability of a plant cell to develop into different types of cells is called:

Single Answer MCQ
Q-00171527
View explanation
Q42.

What aspect of the cell theory unifies all biological disciplines?

Single Answer MCQ
Q-00171528
View explanation
Q43.

Which organelle is responsible for energy production in eukaryotic cells?

Single Answer MCQ
Q-00171529
View explanation
Q44.

Mitosis results in the production of:

Single Answer MCQ
Q-00171530
View explanation
Q45.

What mainly distinguishes eukaryotic cells from prokaryotic cells?

Single Answer MCQ
Q-00171531
View explanation
Q46.

What is the primary function of the cell membrane?

Single Answer MCQ
Q-00171532
View explanation
Q47.

Which of the following describes a selectively permeable membrane?

Single Answer MCQ
Q-00171533
View explanation
Q48.

The fluid-mosaic model describes the structure of which cellular component?

Single Answer MCQ
Q-00171534
View explanation
Q49.

What will happen to a plant cell placed in a hypertonic solution?

Single Answer MCQ
Q-00171535
View explanation
Q50.

Which part of the cell is responsible for synthesizing proteins?

Single Answer MCQ
Q-00171536
View explanation
Q51.

In which type of solution do plant cells remain turgid?

Single Answer MCQ
Q-00171537
View explanation
Q52.

Which of these components is found in prokaryotic cells?

Single Answer MCQ
Q-00171538
View explanation
Q53.

What is the main role of the cell wall in plant cells?

Single Answer MCQ
Q-00171539
View explanation
Q54.

Which process involves the movement of water across a selectively permeable membrane?

Single Answer MCQ
Q-00171540
View explanation
Q55.

What does the term 'tonicity' refer to in biology?

Single Answer MCQ
Q-00171541
View explanation
Q56.

What type of solution is produced when solute concentrations are equal inside and outside the cell?

Single Answer MCQ
Q-00171542
View explanation
Q57.

Which cellular structure is involved in the breakdown of waste materials?

Single Answer MCQ
Q-00171543
View explanation
Q58.

Which of the following best describes the lipid bilayer of the cell membrane?

Single Answer MCQ
Q-00171544
View explanation
Q59.

Why do plant cells require a cell wall?

Single Answer MCQ
Q-00171545
View explanation
Q60.

Which of the following correctly describes a hypotonic solution?

Single Answer MCQ
Q-00171546
View explanation
Q61.

In eukaryotic cells, which structure is important for energy production?

Single Answer MCQ
Q-00171547
View explanation
Q62.

Which of the following is NOT a basic part of most cells?

Single Answer MCQ
Q-00171557
View explanation
Q63.

What is the function of ribosomes in a cell?

Single Answer MCQ
Q-00171559
View explanation
Q64.

Which organelle is primarily responsible for energy production in the cell?

Single Answer MCQ
Q-00171561
View explanation
Q65.

What does a selectively permeable membrane allow?

Single Answer MCQ
Q-00171563
View explanation
Q66.

Which of the following is found in plant cells but not in animal cells?

Single Answer MCQ
Q-00171565
View explanation
Q67.

What is the jelly-like substance within the cell where organelles are suspended?

Single Answer MCQ
Q-00171567
View explanation
Q68.

Which of the following statements about prokaryotic cells is true?

Single Answer MCQ
Q-00171569
View explanation
Q69.

What role does the Golgi apparatus play in a cell?

Single Answer MCQ
Q-00171570
View explanation
Q70.

Which cell structure is responsible for detoxifying harmful substances?

Single Answer MCQ
Q-00171571
View explanation
Q71.

What would happen to a plant cell if its cell wall became flexible like a cell membrane?

Single Answer MCQ
Q-00171572
View explanation
Q72.

What primary component makes up the plant cell wall?

Single Answer MCQ
Q-00171573
View explanation
Q73.

What do lysosomes contain that aids in breaking down waste materials?

Single Answer MCQ
Q-00171574
View explanation
Q74.

In which type of cell would you find a nucleoid region?

Single Answer MCQ
Q-00171575
View explanation
Q75.

What distinguishes eukaryotic cells from prokaryotic cells?

Single Answer MCQ
Q-00171576
View explanation
Q76.

What is the main function of the vacuole in plant cells?

Single Answer MCQ
Q-00171577
View explanation
Q77.

Which organelle is involved in the synthesis of lipids and proteins and is often studded with ribosomes?

Single Answer MCQ
Q-00171578
View explanation
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