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Fundamental Unit of Life

Description: Get Notes and Test Papers for the Chapter Fundamental Units of life for CCE Class X, Chapter wise notes and Tests for CCE Exam
Number of Questions: 40
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Tags: Fundamental Units of life CCE Class X CCE Sample Papers CCE Class X Environmental Science CCE EVS Cell Wall -structured Functions Cells Organelles Plant Cell Nucleus Structure Functions of Nucleus Plasma Membrane or Cell Membrane Structure and Function of a Cell
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Besides the nucleus, the DNA is also present in the

  1. golgi apparatus

  2. ribosome

  3. mitochondria

  4. vacuole


Correct Option: C

Which of the following is a single membrane bound cell organelle?

  1. Nucleus

  2. Lysosome

  3. Mitochondria

  4. Chloroplast


Correct Option: B

Organisms having well defined nucleus with a nuclear membrane are known as

  1. prokaryotes

  2. unicellular

  3. eukaryotes

  4. multi cellular


Correct Option: C

RER looks rough under microscope because of the presence of

  1. fat molecules

  2. carbohydrates

  3. lipids

  4. ribosomes


Correct Option: D

Which of the following statements is not true?

  1. Animal cell has a centrally placed nucleus.

  2. Animal cell is prokaryotic in nature.

  3. Cellulose provides structural strength to plants.

  4. Both animal and plant cells contain a nucleus with chromosome.


Correct Option: B
Explanation:

Animal cells are of two types, eukaryotic, which contain a nucleus, and prokaryotic, which do not. Prokaryotes are single-celled organisms, while eukaryotes can be either single-celled or multicellular.

Movement of water across the plasma membrane is known as

  1. diffusion

  2. plasmolysis

  3. osmosis

  4. active transport


Correct Option: C

Functional segments of DNA are

  1. RNA

  2. chromosomes

  3. genes

  4. peptides


Correct Option: C

Rod-shaped structures in cell nucleus are known as

  1. DNA

  2. genes

  3. ribosomes

  4. chromosomes


Correct Option: D
Explanation:

 The rod-shaped structures in the nucleus of a cell are chromosomes. They carry genetic material in a 'rod' of DNA that is bonded to various proteins in the cell nucleus.

When a cell is placed in a hypertonic solution the contents of the cell shrink away from the cell wall, this process is known as

  1. membrane biogenesis

  2. plasmolysis

  3. turgidity

  4. transpiration


Correct Option: B

If a cell is placed in isotonic solution, it will

  1. shrink

  2. plasmolyse

  3. swell

  4. remain unchanged


Correct Option: D

A plant cell wall is composed of an important substance known as

  1. cellulose

  2. ATP

  3. DNA

  4. chitin


Correct Option: A
Explanation:

The primary cell wall of plants is composed of the polysaccharides cellulose, hemicellulose and pectin.

Water like substance of the cell is known as

  1. mitochondria

  2. cytoplasm

  3. lipids

  4. ribosomes


Correct Option: B

Which of the following organisms can change its shape?

  1. Amoeba

  2. Plant

  3. Bacteria

  4. Algae


Correct Option: A

Plant cells differ from animal cells in the

  1. presence of chromosomes

  2. presence of a large central vacuole

  3. presence of mitochondria

  4. presence of lysosomes


Correct Option: B
Explanation:

Plant cells differ from animal cells in the presence of a large central vacuole.

Energy requirements of cell are fulfilled by

  1. DNA

  2. genes

  3. ribosome

  4. ATP


Correct Option: D

The nuclear region of a prokaryotic cell is known as

  1. nucleolus

  2. nucleoid

  3. vesicle

  4. cisternae


Correct Option: B

Which of the following cell organelle determines the way the cell will develop and the shape it will exhibit on maturity?

  1. Vacuole

  2. Nucleus

  3. Mitochondria

  4. Plastid


Correct Option: B

Plant cells do not burst when kept in an hypotonic solution due to the presence of

  1. vacuole

  2. plastids

  3. cell wall

  4. nucleus


Correct Option: C
Explanation:

When plants are placed in water, the water enters their cells (this is because their sap has a strong solution). The water enters the plant through osmosis and fills up the cell with water to its maximum capacity. A strong cell wall stops the cells from bursting (as in animal cells) and makes the plant to become turgid (becomes rigid/stiff because of water).

Which of the following statements is not true?

  1. The size of prokaryotic cell is smaller than eukaryotic cell.

  2. Prokaryotic cell has a single chromosome.

  3. Cell membrane of a eukaryotic cell bears respiratory enzymes.

  4. Nucleus is bound by nuclear membrane in eukaryotic cell.


Correct Option: C

Which of the following materials is not stored in leucoplasts?

  1. Starch

  2. Oils

  3. Pigments

  4. Proteins


Correct Option: C
Explanation:

Leucoplasts are a category of plastid and as such are organelles found in plant cells. They are non-pigmented, in contrast to other plastids such as the chloroplast.

Which of the following structures is present only in plant cell?

  1. Ribosome

  2. Chloroplast

  3. Nucleus

  4. Plasma membrane


Correct Option: B

The cell organelle that is a large network of membrane bound tubes and sheets is the

  1. vacuole

  2. chloroplast

  3. mitochondria

  4. endoplasmic reticulum


Correct Option: D

Which of the following structures is absent in an animal cell?

  1. Mitochondria

  2. Plastid

  3. Cytoplasm

  4. Cell membrane


Correct Option: B
Explanation:

Plastid is absent in an animal cell. The plastid is a major double-membrane organelle, found among others, in the cells of plants and algae.

Which of the following cell organelles do not contain DNA?

  1. Lysosomes

  2. Plastid

  3. Nucleus

  4. Mitochondria


Correct Option: A

The spontaneous movement of gases across a selectively permeable membrane takes place by

  1. diffusion

  2. permeation

  3. plasmolysis

  4. membrane biogenesis


Correct Option: A
Explanation:

Option (1) is correct. Diffusion across the membrane is the net movement of molecules in a fluid from the region of higher concentration to the region of lower concentration. This is because it decreases the amount of free energy. Diffusion is a spontaneous process.

Which cell organelle is known as ?The powerhouse? of the cell?

  1. Lysosmes

  2. Plastids

  3. Mitochondria

  4. Vacuoles


Correct Option: C

What serves as a fluid in which various cell organelles are embedded?

  1. Cytoplasm

  2. Nucleus

  3. Lysosome

  4. Vacuole


Correct Option: A

Who observed the cell for the first time?

  1. Robert Hooke

  2. Schleiden

  3. Robert Brown

  4. Schwann


Correct Option: A

Which cell organelle is missing in prokaryotes?

  1. Cell membrane

  2. Mitochondria

  3. Cytoplasm

  4. Ribosome


Correct Option: B

Plasma membrane is made up of

  1. carbohydrates and lipids

  2. proteins and lipids

  3. carbohydrates and proteins

  4. vitamins and proteins


Correct Option: B

A common feature between prokaryotic and eukaryotic cell is

  1. presence of nuclear membrane

  2. presence of linear chromosome

  3. presence of chromosome

  4. presence of respiratory enzymes on cell membrane


Correct Option: C

Chloroplasts are important for ___________ in plants.

  1. photosynthesis

  2. animal respiration

  3. reduction

  4. membrane biogenesis


Correct Option: A
Explanation:

Chloroplasts' main role is to conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight and converts it and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water. They then use the ATP and NADPH to make organic molecules from carbon dioxide in a process known as the Calvin cycle.

Animal cells differ from plant cells in that, they do not have

  1. ribosome

  2. mitochondria

  3. nucleus

  4. cell wall


Correct Option: D
Explanation:

 Animal cells differ from plant cells in that, they do not have cell wall.

A system of membrane bound vesicles arranged parallel to each other in bundles, found in golgi apparatus, is known as

  1. Cisterns

  2. Tubules

  3. Vacuole

  4. Lysosome


Correct Option: A

A cell placed in a _________ solution will shrink.

  1. isotonic

  2. hypertonic

  3. hypotonic

  4. monotonic


Correct Option: B

Full form of DNA is

  1. deoxyribonucleic acid

  2. dioxyribonucleic acid

  3. diribonucleic acid

  4. deribonucleic acid


Correct Option: A

Which of the following is not a multicellular organism?

  1. Paramecium

  2. Fish

  3. Cockroach

  4. Pea plant


Correct Option: A
Explanation:

Paramecium is a genus of unicellular ciliated protozoan, commonly studied as a representative of the ciliate group.

The shape and size of a cell is related to its

  1. appearance

  2. nucleus

  3. functions

  4. location


Correct Option: C

Which of the following is a unicellular organism?

  1. Bacteria

  2. Fungi

  3. Plants

  4. Animals


Correct Option: A

Chromosomes are composed of

  1. DNA and vitamins

  2. DNA and proteins

  3. DNA and lipids

  4. proteins and lipids


Correct Option: B
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