R4RIN – MCQs, Mock Tests | NCERT Class 9 Class 9 Science Chapter 5 The Fundamental Unit of Life

Which of the following can be made into crystal?

1. A bacterium
2. An Amoeba
3. A virus
4. A sperm

✅ Correct Answer: 3

A cell will swell up if

1. the concentration of water molecules in the cell is higher than the concentration of water molecules in the surrounding medium.
2. the concentration of water molecules in the surrounding medium is higher than water molecules concentration in the cell.
3. the concentration of water molecules is same in the cell and in the surrounding medium.
4. concentration of water molecules does not matter.

✅ Correct Answer: 2

Which of these options are not a function of ribosomes? (i) It helps in manufacture of protein molecules. (ii) It helps in manufacture of enzymes. (iii) It helps in manufacture of hormones. (iv) It helps in manufacture of starch molecules.

1. (i) and (ii)
2. (ii) and (iii)
3. (iii) and (iv)
4. (iv) and (i)

✅ Correct Answer: 3

Which of these is not related to endoplasmic reticulum?

1. It behaves as a transport channel for proteins between nucleus and cytoplasm.
2. It transports materials between various regions in the cytoplasm.
3. It can be the site of energy generation.
4. None of These

✅ Correct Answer: 3

Following are a few definitions of osmosis: Read carefully and select the correct definition.

1. Movement of water molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane.
2. Movement of solvent molecules from its higher concentration to lower concentration.
3. Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.
4. Movement of solute molecules from lower concentration to higher concentration of solution through a semi permeable membrane.

✅ Correct Answer: 1

Plasmolysis in a plant cell is defined as

1. breakdown (lysis) of plasma membrane in hypotonie medium
2. shrinkageof cytoplasm in hypertonic medium
3. shrinkage of nucleoplasm
4. none of them

✅ Correct Answer: 2

Which of the following are covered by a single membrane?

1. Mitochondria
2. Vacuole
3. Lysosome
4. Plastid

✅ Correct Answer: 2

Find out the false sentence.

1. Nucleus is involved with the formation of lysosomes.
2. Nucleus, mitochondria and plastid have DNA, hence they are able to make their own structural proteins.
3. Mitochondria is said to be the power house of the cell as ATP is generated in them
4. Cytoplasm is called as protoplasm.

✅ Correct Answer: 1

Find out the correct sentence.

1. Enzymes packed in lysosomes are made through RER (rough endoplasmic reticulum).
2. Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively.
3. Endoplasmic reticulum is rélated to the destruction of plasma membrane.
4. Nucleoid is present inside the nucleoplasm of eukaryotic nucleus.

✅ Correct Answer: 1

Which cell organelle plays a crucial role in detoxifring many poisons and drugs in a cell?

1. Golgi apparatus
2. Lysosomes
3. Smooth endoplasmic reticulum
4. Vacuoles

✅ Correct Answer: 3

The proteins and lipids, essential for building the cell membrane, are manufactured by

1. rough endoplasmic reticulum
2. golgi apparatus
3. plasma membrane
4. mitochondria

✅ Correct Answer: 1

The undefined nuclear region of prokaryotes is also known as

1. nucleus
2. nucleolus
3. nucleic acid
4. nucleoid

✅ Correct Answer: 4

The cell organelle involved in forming complex sugars from simple sugars are

1. endoplasmic reticulum
2. ribosomes
3. plastids
4. golgi apparatus

✅ Correct Answer: 4

Which out of the following is not a function of vacuole?

1. Storage
2. Providing turgidity and rigidity to the cell
3. Waste excretion
4. Locomotion

✅ Correct Answer: 4

Amoeba acquires its food through a process, termed

1. exocytosis
2. endocytosis
3. plasmolysis
4. exocytosis and endocytosis both

✅ Correct Answer: 2

Cell wall of which one of these is not made up of cellulose?

1. Bacteria
2. Hydrilla
3. Mango tree
4. Cactus

✅ Correct Answer: 1

Silver nitrate solution is used to study

1. endoplasmic reticulum
2. golgi apparatus
3. nucleus
4. mitochondria

✅ Correct Answer: 2

Organelle other than nucleus, containing DNA is

1. endoplasmic reticulum
2. golgi apparatus
3. mitochondria
4. lysosomes

✅ Correct Answer: 3

Kitchen of the cell is

1. mitochondria
2. endoplasmic reticulum
3. chioroplast
4. golgi apparatus

✅ Correct Answer: 3

Lipid molecules in the cell are synthesised by

1. smooth endoplasmic reticulum
2. rough endoplasmic reticulum
3. golgi apparatus
4. plastids

✅ Correct Answer: 1

Cell arises from pre-existing cell was stated by

1. Haeckel
2. Virchow
3. Hooke
4. Schleiden

✅ Correct Answer: 2

Cell theory was given by

1. Schleiden and Schwann
2. Virchow
3. Hooke
4. Haeckel

✅ Correct Answer: 1

The only cell organelle seen in prokaryotic cell is

1. mitochondria
2. ribosomes
3. plastids
4. lysosomes

✅ Correct Answer: 2

Organelle without a cell membrane is

1. ribosome
2. golgi apparatus
3. chioroplast
4. nucleus

✅ Correct Answer: 1

Lysosome arises from

1. endoplasmic reticulum
2. golgi apparatus
3. nucleus
4. mitochondria

✅ Correct Answer: 2

Living cells were discovered by

1. Robert Hooke
2. Purkinje
3. Leeuwenhoek
4. Robert Brown

✅ Correct Answer: 3

Select the odd one out.

1. The movement of water across a semi permeable membrane is affected by the amount of substances dissolved in it.
2. Membranes are made of organic molecules like proteins and lipids.
3. Molecules soluble in organic solvents can easily pass through the membrane.
4. Plasma membranes contain chitin sugar in plants.

✅ Correct Answer: 4