Start learning →

CBSE Class 9 The Fundamental Unit of Life — practice questions — page 2

Explore 72 free The Fundamental Unit of Life questions in CBSE Class 9 Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise The Fundamental Unit of Life with Quill →

The Fundamental Unit of Life questions and exercises with answers

Showing questions 31–60 of 72.

Lysosomes within a cell are best described as:Read the answer and worked solution →CHLOROPLASTS are organelles that:Read the answer and worked solution →Which scientist first observed cells in cork slices?Read the answer and worked solution →A prokaryotic cell lacks:Read the answer and worked solution →CLASS9 · Biology · Tap Living ThingsRead the answer and worked solution →Match the cell organelle to its functionRead the answer and worked solution →Spot the organelle that is NOT in animal cellsRead the answer and worked solution →Almost every cell shows a nucleus, cytoplasm and a:Read the answer and worked solution →The plasma membrane is described as being:Read the answer and worked solution →Movement of water across a selectively permeable membrane is:Read the answer and worked solution →Absorption of water by plant roots is an example of:Read the answer and worked solution →The plant cell wall lies outside the:Read the answer and worked solution →The plant cell wall is mainly composed of:Read the answer and worked solution →Shrinkage of cell contents away from the wall is called:Read the answer and worked solution →The nuclear membrane carries which feature?Read the answer and worked solution →Chromosomes become visible as rod-shaped structures only when:Read the answer and worked solution →Cells without a nuclear membrane are called:Read the answer and worked solution →Cells having a nuclear membrane are called:Read the answer and worked solution →The endoplasmic reticulum is a network of membrane-bound tubes and:Read the answer and worked solution →Rough endoplasmic reticulum looks rough because of attached:Read the answer and worked solution →Smooth endoplasmic reticulum helps make fat molecules, also called:Read the answer and worked solution →In vertebrates the smooth ER helps in detoxifying poisons and:Read the answer and worked solution →Mitochondria are known as the:Read the answer and worked solution →The inner membrane of a mitochondrion is:Read the answer and worked solution →Plastids are present only in which kind of cell?Read the answer and worked solution →Plastids containing chlorophyll are known as:Read the answer and worked solution →Colourless plastids are called:Read the answer and worked solution →Vacuoles are storage sacs for solid or:Read the answer and worked solution →The central vacuole of some plant cells may occupy:Read the answer and worked solution →The Golgi apparatus stores, modifies and does what to substances?Read the answer and worked solution →

Worked practice questions

Lysosomes within a cell are best described as:

  1. Small membrane sacs containing digestive enzymes
  2. Large membrane organelles that produce all the proteins
  3. Stacks of flat sacs for protein modification only
  4. DNA-rich organelles that direct genetic expression
Show answer and solution

Correct answer: A. Small membrane sacs containing digestive enzymes

Lysosomes are small membrane sacs containing digestive enzymes. They break down old organelles, foreign invaders, and worn-out parts. Sometimes called 'suicide bags' because rupture can destroy the host cell.

Open this question →

CHLOROPLASTS are organelles that:

  1. Are present in both plant and animal cells
  2. Carry out cellular respiration like mitochondria
  3. Are found only in plant cells; carry out photosynthesis
  4. Store the food reserves and act as power plants too
Show answer and solution

Correct answer: C. Are found only in plant cells; carry out photosynthesis

Chloroplasts are plastids found ONLY in plant cells. They contain chlorophyll and carry out photosynthesis, converting sunlight to food. Animal cells do not have chloroplasts.

Open this question →

Which scientist first observed cells in cork slices?

  1. Robert Hooke
  2. Robert Brown
  3. Schleiden
  4. Schwann
Show answer and solution

Correct answer: A. Robert Hooke

Robert Hooke (1665) observed dead cork tissue under a microscope, saw box-like compartments, and coined the term 'cell'.

Open this question →

How to practise

  1. Choose a The Fundamental Unit of Life question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with The Fundamental Unit of Life practice for CBSE Class 9. Read explanations as you go. No signup form needed to start.

Practise The Fundamental Unit of Life →

More Science topics

Diversity in Living OrganismsForce and Laws of MotionTissues: Plant and Animal TissuesWork and EnergyMatter in Our SurroundingsMotionAtoms and MoleculesGravitation