Cell Structure And Function Class 8 Worksheet - Free Printable
Educational worksheet: Cell Structure And Function Class 8 Worksheet. Download and print for classroom or home learning activities.
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Step-by-step solution for: Cell Structure And Function Class 8 Worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Cell Structure And Function Class 8 Worksheet
Let's solve each question step by step and provide clear explanations.
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a. In plants, the cell wall is made up of
👉 Cellulose
✔ *Explanation:* The cell wall in plant cells is primarily composed of cellulose, a strong structural polysaccharide that provides rigidity and protection.
b. All living organisms are made up of one or more
👉 Cells
✔ *Explanation:* This is the fundamental principle of cell theory — all living things are composed of cells, which are the basic units of structure and function.
c. The cell membrane is also called the
👉 Plasma membrane
✔ *Explanation:* The cell membrane, or plasma membrane, is a thin layer surrounding the cell that regulates what enters and exits the cell.
d. The cytoplasm and the nucleus together make up the
👉 Protoplasm
✔ *Explanation:* Protoplasm refers to the living content of a cell, including the cytoplasm and nucleus. It is the material where all cellular activities occur.
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a. A cell in human body that can change its shape
👉 White blood cell (Leukocyte)
✔ *Explanation:* White blood cells, especially amoebocytes like neutrophils and macrophages, can change their shape to move through tissues and engulf pathogens.
b. The membrane that separates the cytoplasm from the nucleus
👉 Nuclear membrane (or Nuclear envelope)
✔ *Explanation:* The nuclear membrane surrounds the nucleus and controls the movement of materials between the nucleus and cytoplasm.
c. The part of the cell that acts as a control centre
👉 Nucleus
✔ *Explanation:* The nucleus contains DNA and directs all cellular activities such as growth, metabolism, and reproduction.
d. Longest cell in our body
👉 Neuron (Nerve cell)
✔ *Explanation:* Neurons, especially motor neurons in the spinal cord, can be very long — some extending from the spine to the toes (up to 1 meter).
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a. Storing food, water and waste in a plant cell
👉 Vacuole
✔ *Explanation:* In plant cells, the large central vacuole stores water, nutrients, waste products, and helps maintain turgor pressure.
b. Digesting substances within the cell
👉 Lysosome
✔ *Explanation:* Lysosomes contain digestive enzymes that break down waste materials, foreign particles, and damaged organelles.
c. Producing energy in the cell
👉 Mitochondria
✔ *Explanation:* Mitochondria are known as the "powerhouses" of the cell because they produce ATP (energy) through cellular respiration.
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a. Pseudopodia
👉 Pseudopodia (meaning "false feet") are temporary projections of the cell membrane and cytoplasm used for movement and feeding. They are commonly found in amoeba and some white blood cells.
✔ *Example:* Amoeba uses pseudopodia to engulf food by surrounding it in a process called phagocytosis.
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#### 1. Fill in the blanks:
a. Cellulose
b. Cells
c. Plasma membrane
d. Protoplasm
#### 2. Name the following:
a. White blood cell (Leukocyte)
b. Nuclear membrane
c. Nucleus
d. Neuron
#### 3. Cell organelles:
a. Vacuole
b. Lysosome
c. Mitochondria
#### 4. Explanation:
a. Pseudopodia – Temporary extensions of the cell used for movement and feeding (e.g., in amoeba).
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This worksheet covers foundational biology concepts related to cell structure and function at the Grade VIII level. Let me know if you'd like this formatted as a printable answer sheet!
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1. Fill in the blanks.
a. In plants, the cell wall is made up of
👉 Cellulose
✔ *Explanation:* The cell wall in plant cells is primarily composed of cellulose, a strong structural polysaccharide that provides rigidity and protection.
b. All living organisms are made up of one or more
👉 Cells
✔ *Explanation:* This is the fundamental principle of cell theory — all living things are composed of cells, which are the basic units of structure and function.
c. The cell membrane is also called the
👉 Plasma membrane
✔ *Explanation:* The cell membrane, or plasma membrane, is a thin layer surrounding the cell that regulates what enters and exits the cell.
d. The cytoplasm and the nucleus together make up the
👉 Protoplasm
✔ *Explanation:* Protoplasm refers to the living content of a cell, including the cytoplasm and nucleus. It is the material where all cellular activities occur.
---
2. Name the following.
a. A cell in human body that can change its shape
👉 White blood cell (Leukocyte)
✔ *Explanation:* White blood cells, especially amoebocytes like neutrophils and macrophages, can change their shape to move through tissues and engulf pathogens.
b. The membrane that separates the cytoplasm from the nucleus
👉 Nuclear membrane (or Nuclear envelope)
✔ *Explanation:* The nuclear membrane surrounds the nucleus and controls the movement of materials between the nucleus and cytoplasm.
c. The part of the cell that acts as a control centre
👉 Nucleus
✔ *Explanation:* The nucleus contains DNA and directs all cellular activities such as growth, metabolism, and reproduction.
d. Longest cell in our body
👉 Neuron (Nerve cell)
✔ *Explanation:* Neurons, especially motor neurons in the spinal cord, can be very long — some extending from the spine to the toes (up to 1 meter).
---
3. Identify the cell organelles associated with the following functions.
a. Storing food, water and waste in a plant cell
👉 Vacuole
✔ *Explanation:* In plant cells, the large central vacuole stores water, nutrients, waste products, and helps maintain turgor pressure.
b. Digesting substances within the cell
👉 Lysosome
✔ *Explanation:* Lysosomes contain digestive enzymes that break down waste materials, foreign particles, and damaged organelles.
c. Producing energy in the cell
👉 Mitochondria
✔ *Explanation:* Mitochondria are known as the "powerhouses" of the cell because they produce ATP (energy) through cellular respiration.
---
4. Explain the terms.
a. Pseudopodia
👉 Pseudopodia (meaning "false feet") are temporary projections of the cell membrane and cytoplasm used for movement and feeding. They are commonly found in amoeba and some white blood cells.
✔ *Example:* Amoeba uses pseudopodia to engulf food by surrounding it in a process called phagocytosis.
---
✔ Final Answers Summary:
#### 1. Fill in the blanks:
a. Cellulose
b. Cells
c. Plasma membrane
d. Protoplasm
#### 2. Name the following:
a. White blood cell (Leukocyte)
b. Nuclear membrane
c. Nucleus
d. Neuron
#### 3. Cell organelles:
a. Vacuole
b. Lysosome
c. Mitochondria
#### 4. Explanation:
a. Pseudopodia – Temporary extensions of the cell used for movement and feeding (e.g., in amoeba).
---
This worksheet covers foundational biology concepts related to cell structure and function at the Grade VIII level. Let me know if you'd like this formatted as a printable answer sheet!
Parent Tip: Review the logic above to help your child master the concept of cell parts and functions worksheet.
