35 Cell Biology MCQ Quiz to Test Your Knowledge

Here, we have covered the most important 35 multiple-choice questions (MCQ) in the quiz format on the introduction of cell in biology. So, are you ready to challenge yourself with an exciting Cell Biology MCQ quiz?

Whether you’re a student preparing for competitive exams, such as SSC, RRB, etc. or a biology lover looking to refresh your knowledge, these 35 multiple-choice questions will test your understanding in cell topic in biology.

Think you know everything about cells? Take the quiz now and see how many questions you can answer correctly! 🎯💡

1. Which of the following is the basic structural and functional unit of all living organisms?

A. Atom

B. Molecule

C. Cell

D. Tissue

The cell is the smallest and most basic unit of life, which is composed of a life-giving substance called protoplasm. It is often referred to as the building block of life.

2. Which scientist first observed and named the “cell”?

A. Antonie van Leeuwenhoek

B. Matthias Schleiden

C. Rudolf Virchow

D. Robert Hooke

Robert Hooke discovered the cell in 1665 when he observed a thin slice of cork under a microscope and coined the term “cell”.

3. Who are the scientists credited with constituting the Cell Theory?

A. Darwin and Mendel

B. Schleiden, and Schwann

C. Watson and Crick

D. Hooke and Leeuwenhoek

Cell Theory was propounded by two German biologist Matthias Schleiden and Theodor Schwann, in 1839. They said that “All the plants and animals are made up of cell and cell is the basic unit of life”.

4. Who is the first scientist credited to explain that cells divide and new cells are formed from the pre-existing cells?

A. Matthias Schleiden

B. Theodor Schwann

C. Rudolf Virchow

D. Watson

In 1855, Rudolf Virchow was the first to explain that cells divide and new cells come from pre-existing cells.

5. Which of the following is not main principle of the Cell Theory?

A. All living organisms are made of one or more cells.

B. The cell is the basic unit of structure and function in living things.

C. Cells arise only from pre-existing cells.

D. All cells contain a nucleus.

The statement “All cells have a nucleus” is not a part of the Cell Theory and is incorrect as a universal rule of Cell Theory.

6. Which of the following best describes a unicellular organism?

A. An organism made of many cells.

B. An organism with no nucleus.

C. An organism made of only one cell.

D. An organism that does not grow.

If the organisms are made up of a single cell, they are called unicellular organisms.

7. What is a multicellular organism?

A. An organism made up of a single cell.

B. An organism made up of many cells.

C. An organism without a nucleus.

D. An organism that does not grow.

Multicellular organisms are composed of many cells, while unicellular organisms consist of only one cell.

8. Which of the following is an example of a unicellular organism?

A. Human

B. Oak tree

C. Amoeba

D. Whale

Bacteria, Amoeba, and Paramecium are a unicellular organism, while humans, like other animals and plants, are multicellular organisms.

9. Which of the following is not a unicellular organism?

A. Paramecium

B. Yeast

C. Bacteria

D. Frog

Frogs are multicellular organisms, while paramecium, yeast, and bacteria are unicellular.

10. How do unicellular organisms reproduce?

A. By producing seeds

B. By cell division

C. By laying eggs

D. By photosynthesis

Most unicellular organisms reproduce through cell division methods such as binary fission (bacteria) or mitosis (amoeba and yeast).

11. Which of the following unicellular organisms causes diseases like tuberculosis?

A. Amoeba

B. Paramecium

C. Euglena

D. Mycobacterium tuberculosis

Mycobacterium tuberculosis is a unicellular bacterial pathogen that is the primary cause of tuberculosis (TB).

12. What is the function of contractile vacuoles in unicellular organisms?

A. To store food

B. To help in reproduction

C. To remove excess water from the cell

D. To produce energy

Contractile vacuole in unicellular organisms such as amoeba and paramecium pump out excess water to maintain balance.

13. Which unicellular organism can perform photosynthesis?

A. Bacteria

B. Yeast

C. Amoeba

D. Euglena

Euglena is a unicellular eukaryotic organism that can perform photosynthesis like plants and also move like animals.

14. What is binary fission?

A. A type of respiration

B. A type of asexual reproduction

C. A feeding process

D. A method of locomotion

Binary fission is a form of asexual reproduction in which a unicellular organism divides into two identical daughter cells (such as bacteria, amoeba).

15. How do unicellular organisms obtain energy?

A. Only through photosynthesis

B. Only by eating plants

C. Through respiration, fermentation, or photosynthesis

D. Only by consuming oxygen

Unicellular organisms such as bacteria, yeast, etc. obtain energy through different processes like aerobic/anaerobic respiration, fermentation, or photosynthesis.

16. Which unicellular organism is commonly used in baking and fermentation?

A. Amoeba

B. Yeast

C. Bacteria

D. Paramecium

Yeast (Saccharomyces cerevisiae) is a unicellular fungus used in baking and fermentation to produce carbon dioxide and alcohol.

17. Which of the following structures is found in all unicellular organisms?

A. Nucleus

B. Chloroplast

C. Mitochondria

D. Cell membrane

All unicellular organisms have a cell membrane (also called the plasma membrane) that controls the movement of substances in and out of the cell.

18. What is the role of pseudopodia in amoeba?

A. To digest food

B. To help in movement and feeding food

C. To perform photosynthesis

D. To protect the cell from predators

Pseudopodia means false feet that are temporary finger-like projections that help amoeba move and engulf food by phagocytosis.

19. Which of the following is an example of a specialized cell in multicellular organisms?

A. Paramecium

B. Amoeba

C. Bacterium

D. Red blood cell

Red blood cells are specialized to carry oxygen throughout the body. Unicellular organisms (Paramecium, Amoeba, and Bacteria) do not have specialized cells.

20. In multicellular organisms, groups of similar cells working together form a __________.

A. Tissue

B. Atom

C. Organelle

D. Molecule

A tissue is a group of similar cells that work together to perform a specific function. For example, muscle is a type of tissue found in the bodies of animals, including humans.

21. A group of different tissues working together to perform a specific function is called

A. Organ system

B. Organ

C. Organism

D. None of these

An organ is a group of different tissues working together to perform a specific function. Since a single tissue cannot perform complex tasks alone, multiple tissues combine to form an organ. For example, heart is an organ made up of cardiac muscle tissue, connective tissue, nervous tissue, and epithelial tissue. Other examples of organs are liver, stomach, skin, etc.

22. Which of the following correctly represents the organization of multicellular organisms?

A. Organ → Tissue → Cell → Organ System → Organism

B. Cell → Tissue → Organ → Organ System → Organism

C. Tissue → Organ → Cell → Organ System → Organism

D. Organism → Organ System → Organ → Tissue → Cell

The correct order of biological organization is: Cells → Tissues → Organs → Organ Systems → Organism.

23. What is the primary function of the nervous system in multicellular organisms?

A. Transporting oxygen

B. Breaking down food

C. Sending and receiving signals

D. None of these

The nervous system is made up of nerve cells (neurons), which transmit signals between different parts of the body for communication and response.

24. Why do multicellular organisms need a circulatory system?

A. To produce oxygen

B. To create new cells

C. To break down food

D. To transport nutrients, oxygen, and waste throughout the body

A circulatory system transports nutrients, oxygen, and waste throughout the body.

25. Which organ system is responsible for breaking down food in multicellular animals?

A. Respiratory system

B. Nervous system

C. Digestive system

D. Endocrine system

The digestive system helps break down food into nutrients that can be absorbed and used for energy. It includes the stomach, intestines, and enzymes.

26. Which multicellular organism is an example of a plant?

A. Paramecium

B. E. coli

C. Amoeba

D. Mango tree

The mango tree is a multicellular organism in the plant.

27. What happens when a multicellular organism grows?

A. Its cells get larger.

B. It produces new specialized cells through cell division.

C. It adds more nuclei to existing cells.

D. None

Growth in multicellular organisms occurs through cell division (mitosis), which increases the number of cells and the organism grows.

28. Which type of tissue helps in movement?

A. Epithelial tissue

B. Connective tissue

C. Nervous tissue

D. Muscle tissue

Muscle tissue is responsible for movement in the body.

29. Which of the following is not an example of an organ system?

A. Circulatory system

B. Muscle

C. Digestive system

D. Excretory system

An organ system is a group of organs working together. Circulatory system, digestive system, and excretory system are the examples of an organ system.

30. Which of the following is not an organ?

A. Heart

B. Liver

C. Muscle

D. Skin

Muscle is not an organ by itself, but a tissue that forms part of organs.

31. Which organ is responsible for filtering waste from the blood?

A. Kidneys

B. Liver

C. Stomach

D. Lungs

The kidneys are part of the excretory system, which filter waste and excess fluids from the blood, and are then excreted as urine. They help to maintain fluid and electrolyte balance.

32. What is the largest organ in the human body?

A. Liver

B. Heart

C. Brain

D. Skin

The skin is the largest organ in the human body, which protects internal structures and helps to regulate body temperature through sweating and blood flow control.

33. Which organ stores bile and helps in fat digestion?

A. Stomach

B. Liver

C. Gallbladder

D. Pancreas

The gallbladder organ stores bile, which helps break down fats in the digestive system.

34. Which organ plays a major role in detoxifying harmful substances?

A. Heart

B. Liver

C. Kidney

D. None of these

The liver plays a major role in detoxifying harmful substances in the body. It converts them into less harmful substances or making them easier to excrete.

35. Which organ produces insulin to regulate blood sugar levels?

A. Pancreas

B. Liver

C. Stomach

D. Kidneys

The pancreas produces insulin, which regulates blood sugar levels and helps in digestion.