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Structure and Functions of a Cell

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Number of Questions: 25
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Which of the following is called 'energy currency of a cell'?

  1. Mitochondrion

  2. Lysosome

  3. DNA

  4. ATP


Correct Option: D
Explanation:

ATP molecules store energy which is used for mechanical work. So, they are called 'energy currency of a cell'.

Which of the following is not a 'single-celled' animal?

  1. Human being

  2. Amoeba

  3. Paramecium

  4. Trichonympha


Correct Option: A
Explanation:

Human being is a multicellular animal, who shows division of labour.

Which of the following statements is false about cisternae?

  1. They are flattened structures.

  2. They are spherical and fluid filled structures.

  3. They are membranous structures.

  4. They are found in golgi bodies.


Correct Option: B
Explanation:

Cisternae are not spherical structures. They are stacked one above the other. Vesicles are spherical and fluid filled structures in golgi bodies.

Chromatin is a material found in ________ of the cell.

  1. cell wall

  2. nucleus

  3. cytoplasm

  4. DNA


Correct Option: B
Explanation:

Chromatin material is found in nucleus. Nucleus has hereditary information.

In what form is the chromatin material found in nucleus?

  1. In thread like structure

  2. In the form of fluid

  3. Membrane bound structure

  4. In coloured form


Correct Option: A
Explanation:

Chromatin material is found in nucleus in the form of intertwined mass of thread-like structures.

What is the position of genes in a cell?

  1. In cytoplasm

  2. On plasma membrane

  3. In plastids

  4. Along the chromosomes


Correct Option: D
Explanation:

Genes are arranged in single linear order along the chromosomes in nucleus.

A nucleolus mainly contains

  1. granular dense fluid

  2. pigments

  3. cellulose

  4. ribonucleic acid


Correct Option: D
Explanation:

A nucleolus found in nucleus mainly contains ribonucleic acid. 

At the time of cell division, which material forms chromosomes?

  1. Chromatin material

  2. Cellulose

  3. ATP

  4. RNA


Correct Option: A
Explanation:

Chromosomes are formed at the time of cell division from chromatin material (mainly DNA).

Which of the following is not performed by Golgi apparatus?

  1. Storage

  2. Formation of sugars

  3. Formation of cell plate

  4. Mechanical support to cell


Correct Option: D
Explanation:

Endoplasmic reticulum provides mechanical support to a cell.

The term coined for 'barrier between protoplasm and outer environment' in an animal cell is

  1. plasma membrane

  2. cell wall

  3. nuclear membrane

  4. tonoplast


Correct Option: A
Explanation:

Plasma membrane is the outer most layer in an animal cell. So, it is a barrier between protoplasm and outer environment.

Which of the following organelles is common in both plant and animal cells?

  1. Cell wall

  2. Large vacuole

  3. Chloroplast

  4. Endoplasmic reticulum


Correct Option: D
Explanation:

Endoplasmic reticulum is a large network of tubes and sheets. They are present in all cells.

Which of the following is not true about a cell?

  1. A cell has four functional regions.

  2. A cell is the basic unit of all organisms.

  3. Cell is alive.

  4. Robert Hook discovered the cell.


Correct Option: A
Explanation:

A cell has only three functional regions - plasma membrane, nucleus and cytoplasm.

Which of the following organelles has its own DNA and ribosome like mitochondria?

  1. Stroma

  2. Golgi apparatus

  3. Vacuoles

  4. Endoplasmic reticulum


Correct Option: A
Explanation:

Stroma contains DNA, ribosomes and RNA also. Stroma is a structure of chloroplast.

Why are cell organelles important for a cell?

  1. For cell protection

  2. Gives shape and size

  3. Basic unit of a organism

  4. Functional unit of a cell


Correct Option: D
Explanation:

A cell organelle is a functional unit of a cell, which performs all activities, like respiration, photosynthesis, etc.

Which statement is not related to nucleus?

  1. Robert Brown discovered the nucleus.

  2. It is the largest cell structure.

  3. It contains plastids.

  4. It is centrally located in a cell.


Correct Option: C
Explanation:

Nucleus does not contain plastids. It is found in cytoplasm of a plant cell.

'All cells arise from pre-existing cells'. Who proposed this statement?

  1. Virchow

  2. Robert Hook

  3. Leuwenhoek

  4. Robert Brown


Correct Option: A
Explanation:

Virchow stated that all cells arise from pre-existing cells in 1885.

Plasmolysis phenomenon takes place due to

  1. endosmosis

  2. diffusion

  3. absorption

  4. exosmosis


Correct Option: D
Explanation:

In plasmolysis, a cell looses water through osmosis. Higher concentration of water is in the cell and lower concentration of water is out of the cell. In plasmolysis, water passes out from the cell due to exosmosis.

Plastids are present in

  1. protozoan euglena

  2. human beings

  3. nerve cells

  4. an ostrich egg


Correct Option: A
Explanation:

Protozoan euglena is an animal cell having plastids.

Which of the following is concerned with the transport of proteins?

  1. Smooth endoplasmic reticulum

  2. Chloroplast

  3. Tubes and sheets

  4. Rough endoplasmic reticulum


Correct Option: D
Explanation:

Rough ER is concerned with the transport of proteins, which are synthesised by ribosomes on its surface.

Which of the following structures is non-living in a cell?

  1. Plasma membrane

  2. Nucleus

  3. Protoplasm

  4. Cell wall


Correct Option: D
Explanation:

Cell wall is the outer most layer of a plant cell, made up of cellulose. It is non-living in nature.

Which of the following statements defines the term 'division of labour'?

  1. Movement of a substance from one region to another

  2. The passage of water from a region of higher concentration through a semi -permeable membrane

  3. Release of energy

  4. Organism have different organs for different functions


Correct Option: D
Explanation:

Division of labour means multicellular organisms like human beings have different body parts for different functions.

Which of the following cell organelles does not have two types of structures?

  1. Endoplasmic reticulum

  2. Plastids

  3. Ribosomes

  4. Mitochondria


Correct Option: D
Explanation:

Mitochondria is found single in number in the cell.

____________ are present in lysosomes.

  1. Hydrolytic enzymes

  2. Amino acids

  3. Toxic metabolic products

  4. ATP


Correct Option: A
Explanation:

Lysosomes have their own hydrolytic enzymes for self destruction.

Which of the following is a common factor in cells and machines?

  1. Synthesis of substances

  2. Digestion of substances

  3. Living in nature

  4. Structural organisation


Correct Option: D
Explanation:

Cells and machines both have a particular structural organisation for working.

Which of the following organelles is also called as 'Internal transport system'?

  1. Endoplasmic reticulum

  2. Mitochondria

  3. Ribosomes

  4. Lysosomes


Correct Option: A
Explanation:

Endoplasmic reticulum serves as channels for the transport of materials between various regions of the cytoplasm. So, it is called 'Internal transport system'.

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