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The Fundamental Unit of Life

Description: Science, IX, Biology, The Fundamental Units of Life
Number of Questions: 15
Created by:
Tags: Biology Variation in Shape and Size of the Cells Structural Organization of a Cell Hypotonic Solution Division of Labour in the Cells Structure and Function of a Cell Fundamental Units of Life
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Which of the following is the largest plant cell?

  1. Nerve cell

  2. Acetabularia

  3. Fibre

  4. Pleuro pneumonia

  5. Ameoba


Correct Option: B
Explanation:

Acetabularia is the largest plant cell.

Which of the following is the correct process involved if a few raisins are soaked in water overnight and they swell?

  1. Endocytosis

  2. Diffusion

  3. Plasmolysis

  4. Osmosis

  5. Exocytosis


Correct Option: D
Explanation:

Osmosis is diffusion of solvent molecules through a semi-permeable membrane from a region of low concentration to high concentration. The raisins will swell due to incoming water and this process is called osmosis.

If a cell is placed in a medium and it gains water, what type of solution is the cell placed in?

  1. Hypotonic

  2. Hypertonic

  3. Isotonic

  4. Hyposmatic

  5. Hyperosmatic


Correct Option: A
Explanation:

A hypotonic solution has a lower concentration of solutes outside the cell than inside the cell. In an attempt to balance the concentrations of solutes inside and outside the cell, water will rush into the cell causing it to swell and possibly burst.

Which of the following is the fluid living content between the plasma membrane and the nucleus of a cell?

  1. Endoplasmic reticulum

  2. Golgi apparatus

  3. Vacuoles

  4. Protoplasm

  5. Cytoplasm


Correct Option: E
Explanation:

Cytoplasm is the fluid living content between the plasma membrane and the nucleus.

Which of the following is the liquid part of the cytoplasm other than the organelles?

  1. Endoplasmic reticulum

  2. Lysosome

  3. Cytosol

  4. Chromoplast

  5. Leucoplast


Correct Option: C
Explanation:

Cytosol is the liquid part of the cytoplasm other than the organelles.

_____________________ is the protein synthesising site of the cell.

  1. Endoplasmic reticulum

  2. Golgi apparatus

  3. Lysosome

  4. Mitochondria

  5. Cytostome


Correct Option: A
Explanation:

Endoplasmic reticulum is the protein synthesising site of the cell.

The function of which of the following organelles includes the storage, modification and packaging of products in vesicles?

  1. Lysosome

  2. Ribosome

  3. Vacuole

  4. Golgi apparatus

  5. Endoplasmic reticulum


Correct Option: D
Explanation:

Golgi apparatus is the site for storing and transporting proteins across the cytoplasm.

Which of the following organelles possesses its own DNA and ribosomes?

  1. Mitochondria

  2. Endoplasmic reticulum

  3. Golgi apparatus

  4. Vacuoles

  5. Lysosomes


Correct Option: A
Explanation:

Mitochondria is the power house of the cell. It possesses its own DNA and ribosomes.

Which of the following statements is correct?

  1. Fatty acid synthesis takes place in chloroplasts.

  2. Starch synthesis takes place in cytosol.

  3. Lysosomes store sugar.

  4. Ribosomes are small granules that synthesise proteins.

  5. Mitochondria is the site storing and transporting proteins.


Correct Option: D
Explanation:

Ribosomes are small granules that synthesise proteins.

Which of the following is the membrane that surrounds the large vacuoles in the plant cells?

  1. Cell membrane

  2. Plasma membrane

  3. Cell wall

  4. Leucoplast

  5. Tonoplast


Correct Option: E
Explanation:

A vacuole is surrounded by a membrane called the tonoplast it separates the vacuolar contents from the cell's cytoplasm.

Which of the following molecules of a cell is/are known as the energy currency of the cell?

  1. RNA

  2. DNA

  3. ATP

  4. Amino acids

  5. Nucleoids


Correct Option: C
Explanation:

Adenosine triphosphate (ATP) is called the energy currency of the cell because it is the primary molecule for reserving and transmitting energy within cells.

Which of the following scientists proposed that all cells arise from all pre-existing cells?

  1. Robert Hooke

  2. J.E Purkinje

  3. Rudolph Carl Virchow

  4. Robert Brown

  5. Theodor Schwann


Correct Option: C
Explanation:

Rudolph Carl Virchow proposed that all cells arise from all pre-existing cells in 1855.

Which of the following is a correct statement about plastids?

  1. They are the fluid living content between the plasma membrane and the nucleus.

  2. They are found in plant cells only and have extra nuclear DNA.

  3. They are the protein synthesising site of the cell.

  4. They are the site for storing and transporting proteins across the cytoplasm.

  5. They are the storage units in cells.


Correct Option: B
Explanation:

Plastids are found in plant cells only. They are double membrane bounded structures. They have extra nuclear DNA. Chromoplasts and leucoplasts are the two types of plastids.

Match the columns.

Column I
Column II
a. Nucleic acid 1. Own genetic material
b. Lysosomes 2. Digestive enzymes
c. Chloroplasts 3. DNA
  1. a - 1, b - 2, c - 3

  2. a - 3, b - 2, c - 1

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 3, c - 1

  5. a - 2, b - 1, c - 3


Correct Option: B
Explanation:

Nucleic acid present in nucleus of DNA cells. Lysosomes are rich in digestive enzymes. Chloroplasts and mitochondria have their own genetic material. All these are matched correctly.

Match the given columns:

Column I
Column II
a. Control centre of the cell 1. Lysosomes
b. Export firms of the cell 2. Nucleus
c. Demolitionsquads/suicide bags of the cell 3. Golgi bodies
  1. a - 2, b - 3, c - 1

  2. a - 2, b - 1, c - 3

  3. a - 1, b - 3, c - 2

  4. a - 3, b - 2, c - 1

  5. a - 1, b - 2, c - 3


Correct Option: A
Explanation:

Nucleus is the control centre of the cell. Golgi bodies are the export firms of the cell. Lysosomes are the demolition experts or the suicide bags of the cell. These are correctly matched.

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