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Cell and Cell Structure

Description: This test is standardised achievment test in biology suitable for the students of cbse,icse and all other boards of class 7 and also useful for the students of different competitions and olympiads.
Number of Questions: 20
Created by:
Tags: Cell theory Cell - Structure and Functions Cell Organelles Cells and Tissues Cell Structure Limited Life of Certain Natural Resources
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Which of the following is a non-membranous organelle of a cell?

  1. Ribosome

  2. Endoplasmic reticulum

  3. Nucleus

  4. Chloroplast

  5. Mitochondria

Show answer
Correct Option: A
Explanation:

Ribosomes are not bound by any membrane.

The term cell was coined by

  1. Anton won Leeuwenhoek

  2. Robert Hooke

  3. M. Schleiden

  4. Theodor Schwann

  5. Rudolf Virchow

Show answer
Correct Option: B
Explanation:

While observing a thin slice of cork, he noticed small box like structures in it.  He called them cells.

Which of the following statement is false?

  1. When a cell divides, two identical cells are formed.

  2. Cells must divide for growth.

  3. A cell must have a nucleus to divide.

  4. All cells can divide or repair themselves.

  5. Cells divide to reproduce.

Show answer
Correct Option: D
Explanation:

It is false because some cells like red blood cells or nerve cells cannot repair themselves or multiply themselves but most cells like skin cells can.

Which of the following statements defines cell membrane?

  1. It gives plants cells extra strength and also a shape.

  2. A large sugary liquid filled space in a plant cell.

  3. It controls the cell's activities.

  4. Most of the liquid in an animal cell.

  5. The thin outer layer of an animal cell.

Show answer
Correct Option: E
Explanation:

Yes, it is the cell membrane.

The centrosome contains how many centrioles?

  1. Four centrioles

  2. Two centrioles

  3. One centriole

  4. Three centrioles

  5. Zero centrioles

Show answer
Correct Option: B
Explanation:

Yes, centrosome contains two micro cylindrical bodies called centrioles.

What will happen if the ribosomes of a cell are destroyed?

  1. Fats will not be stored.

  2. Proteins will not be formed.

  3. Cell wall will not form.

  4. Respiration will not take place.

  5. Photosynthesis will not take place.

Show answer
Correct Option: B
Explanation:

Ribosomes are the protein factories of the cell, if ribosomes of the cell are destroyed then proteins will not be formed.

The green pigment in the chloroplast is present in which of its part?

  1. Cristae

  2. Cisternae

  3. Grana

  4. Stroma

  5. Centrioles

Show answer
Correct Option: C
Explanation:

Grana is a part of chloroplast, which contains molecules of the green pigment, chlorophyll and other pigments to trap the solar energy.

Which of the following statements is correct?

  1. Hooke was first to observe living cells and introduce the word cell to describe them.

  2. Brown, Schleiden and Schwann, all working independently, were the first to propose cell theory.

  3. Rudolf Virchow was the first to propose that 'all cells arise from other cells'.

  4. Leeuwenhoek was the first to observe unicellular organisms in pond water.

  5. Theodor Schwann observed plant parts and concluded that all plant parts were made up of cells.

Show answer
Correct Option: D
Explanation:

Leeuwenhoek was the first to observe unicellular organisms in pond water.

Which of the following statements is not stated in cell theory?

  1. Cells are the basic structural units of living organisms.

  2. New cells are formed due to division in old cells.

  3. All cells are identical.

  4. The way an organism functions depends on the way the cells work.

  5. The organisation of cells in the body of a living organism determines its structure.

Show answer
Correct Option: C
Explanation:

No, this statement is not stated in cell theory. All cells are similar in their basic structure and function, but are not identical.

Which of the following organelle is not bound by a membrane?

  1. Nucleus

  2. Mitochondria

  3. Ribosomes

  4. Chloroplast

  5. Vacuole

Show answer
Correct Option: C
Explanation:

Ribosomes are not bound by any membrane.

If living cells similar to those found on earth were found on another planet where there is no oxygen, which cell organelle would most probably be absent?

  1. Ribosomes

  2. Cell membrane

  3. Chromosomes

  4. Mitochondria

  5. Lysosomes

Show answer
Correct Option: D
Explanation:

Mitochondria would most probably be absent because mitochondria are the sites of aerobic respiration and aerobic respiration occurs in the presence of oxygen.

In a dividing cell, which of the following forms thread like structures?

  1. Chromosomes

  2. Genes

  3. Centriole

  4. Chromoplast

  5. Chromatin material

Show answer
Correct Option: E
Explanation:

In a dividing cell, the chromatin material forms small thread like structures called chromosomes.

Which of the following is/are responsible for the origin of lysosomes?

  1. Chloroplasts

  2. Mitochondria

  3. Golgi bodies

  4. Ribosomes

  5. Cell membrane

Show answer
Correct Option: C
Explanation:

Lysosomes are produced by the rough ER and Golgi bodies.

Why do green tomatoes turn red?

  1. New chloroplasts are made.

  2. Chloroplasts are disintegrated and converted into chromoplasts.

  3. Chromoplasts are changed into chloroplasts.

  4. Leucoplasts are converted into chromoplasts.

  5. Chloroplasts are converted into leucoplasts.

Show answer
Correct Option: B
Explanation:

Yes, it is true. Chloroplasts are disintegrated and converted into chromoplasts.

Which of the following is not associated with plastids?

  1. Carotene

  2. Chlorophyll

  3. Xanthophyll

  4. Anthocyanin

  5. Leucoplast

Show answer
Correct Option: D
Explanation:

Anthocyanins are pigments which are associated with plastids, instead they remain dissolved in the cell- sap and give that color to the plant structure.

Which of the following cell organelles are called dictyosomes in a plant cell?

  1. Ribosomes

  2. Golgi bodies

  3. Centrosomes

  4. Chromosomes

  5. Lysosomes

Show answer
Correct Option: B
Explanation:

In plants, the golgi bodies are smaller, unconnected and distributed throughout the cytoplasm.

The function of the nucleolus in the cell is

  1. Initiates and regulates cell division

  2. Synthesis of DNA

  3. Synthesis of RNA and ribosomes

  4. Intracellular digetion

  5. Carry hereditary structures

Show answer
Correct Option: C
Explanation:

Nucleolus produces ribosomes participates in protein synthesis by forming and storing RNA.

Which of the following is not the function of the Smooth endoplasmic reticulum?

  1. Smooth ER gives support to the cytoplasm.

  2. Smooth ER is the site of steroid production and lipids.

  3. Smooth ER transports the proteins made on the ribosomes.

  4. Smooth ER acts as a storage site for calcium in skeletal muscle cells.

  5. Smooth ER contains enzymes that detoxify a wide variety of organic molecules in the cell.

Show answer
Correct Option: C
Explanation:

Rough ER contains ribosomes on it, which transports the proteins, but smooth ER does not contain ribosomes on it.

Which one of the following organisms is not an example of eukaryotic cell?

  1. Amoeba proetus

  2. Yeast

  3. Paramoecium

  4. Escherichia coli

  5. Euglena viridis

Show answer
Correct Option: D
Explanation:

It is not an eucaryotic cell, it is a procaryotic cell because it is bacteria.

Prokaryotic cell does not possess

  1. Cell wall

  2. Plasma membrane

  3. Nuclear membrane

  4. Ribosomes

  5. Chromosomes

Show answer
Correct Option: C
Explanation:

Prokaryotic cell does not possess nuclear membrane because nucleus is absent in prokaryotic cell.

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