Cell Structure and Functions class 8 worksheets
In Class 8 Science, students learn about the cell structure and functions of various cells. To reinforce their understanding of the topic, teachers often assign worksheets on cell structure and function. These worksheets help students to better understand the complex processes that take place within a cell.
One such worksheet on cell structure and functions for Class 8 Science Chapter 8 is available in PDF format. This worksheet covers the various organelles present in a cell and their functions, as well as the differences between plant and animal cells.
The worksheet includes questions on the smallest cell in the human body, the shape of cells, and the function of chromosomes. Students are also asked to label a plant cell diagram and identify the various organelles present in the cell.
Another worksheet for Class 8 Science Chapter 1 focuses on the basics of a cell. It covers topics such as what a cell is, what its components are, and the discovery of the cell. Students are also asked to differentiate between living and non-living structures and identify the various parts of a cell.
To further their understanding, students can also attempt MCQs on cell structure and function for Class 8. These MCQs cover topics such as the function of mitochondria and the difference between prokaryotic and eukaryotic cells. This allows students to test their knowledge and better prepare for exams.
The study of cells is known as cytology, and it is an important field in biology. Cells are the building blocks of life and the smallest unit of life. They perform various functions such as producing energy, synthesizing proteins, and maintaining the overall structure of an organism.
One of the key components of a cell is the cell membrane. This membrane separates the internal components of the cell from the external environment and plays a crucial role in maintaining the integrity of the cell.
Cells also contain various organelles such as the nucleus, mitochondria, and chloroplasts, each of which has a specific function. The nucleus, for example, contains genetic material in the form of DNA and controls the functions of the cell. Mitochondria, on the other hand, produce energy in the form of ATP, while chloroplasts are involved in photosynthesis in plant cells.
In conclusion, worksheets on cell structure and function are an important tool for students to reinforce their understanding of the topic. These worksheets cover various aspects of a cell and help students to better understand the complex processes that take place within a cell. The study of cells is an important field in biology, and a thorough understanding of cell structure and function is essential for a deeper understanding of life itself.
Cell structure and function class 8 questions and answers
What is a cell?
A cell is the basic structural and functional unit of all living organisms. It is the smallest unit of life that can perform all the necessary functions required for life.
What is the cell membrane?
The cell membrane is a thin, semi-permeable membrane that surrounds the cell. It regulates the flow of materials in and out of the cell and also protects the cell from the external environment.
What are organelles?
Organelles are specialized structures within a cell that perform specific functions. Examples of organelles include the nucleus, mitochondria, and chloroplasts.
What is the function of the nucleus?
The nucleus is the control center of the cell. It contains the genetic material of the cell in the form of DNA and regulates the cell's activities.
What is the function of mitochondria?
Mitochondria are the powerhouses of the cell. They convert energy from food into a form that the cell can use to perform its functions.
What is the function of chloroplasts?
Chloroplasts are found only in plant cells and are responsible for photosynthesis. They convert light energy into chemical energy that the cell can use.
What is cytoplasm?
Cytoplasm is the jelly-like substance that fills the cell. It contains all the organelles and provides a medium for their activities.
What is the function of the cell wall?
The cell wall is found only in plant cells and provides support and protection to the cell.
What is the difference between animal and plant cells?
Plant cells have a cell wall, chloroplasts, and a large central vacuole, while animal cells do not have a cell wall, chloroplasts, or a central vacuole.
What is the smallest cell in the human body?
The smallest cell in the human body is the sperm cell.
Q. What is cell structure and function in class 8?
A: Cell structure and function is a chapter in the science curriculum for Class 8 students that teaches them about the fundamental unit of life - the cell. Students learn about the various parts of a cell, their structure, and their functions. The chapter covers topics such as the cell membrane, cytoplasm, nucleus, mitochondria, and chloroplasts in plant cells.
Q: What are the parts of a cell?
A: The parts of a cell include the cell membrane, cytoplasm, nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles. In plant cells, there are additional structures such as cell walls and chloroplasts.
Q: What is the function of the cell membrane?
A: The cell membrane is a thin, semi-permeable membrane that encloses the cell and regulates the movement of substances in and out of the cell. It acts as a barrier between the internal environment of the cell and the external environment.
Q: What is the function of the cytoplasm?
A: The cytoplasm is a jelly-like substance that fills the cell and contains all the organelles. It provides a medium for the movement of organelles and allows various cellular processes to take place.
Q: What is the function of the nucleus?
A: The nucleus is the control center of the cell and contains genetic material in the form of DNA. It controls the cell's activities and is responsible for the replication and transmission of genetic information during cell division.
Q: What is the function of mitochondria?
A: Mitochondria are organelles that produce energy in the form of ATP through a process called cellular respiration. They are sometimes referred to as the "powerhouses" of the cell.
Q: What is the function of chloroplasts in plant cells?
A: Chloroplasts are organelles that are responsible for photosynthesis, the process by which plants make their own food. They contain chlorophyll, a green pigment that absorbs light energy and converts it into chemical energy in the form of glucose.
Q: What is the difference between plant and animal cells?
A: Plant cells have a cell wall, chloroplasts, and larger vacuoles, while animal cells do not have a cell wall or chloroplasts, and have smaller vacuoles. Plant cells are also generally more rigid and rectangular in shape, while animal cells are more irregularly shaped.
Q: What is the importance of studying cell structure and function?
A: Studying cell structure and function is important because it helps us understand the basic unit of life and how organisms function at the cellular level. It has implications for fields such as medicine, agriculture, and biotechnology, and can help us develop new treatments for diseases and improve crop yields.
Quick recall' science olympiad questions point:
The longest cell in a plant is the fiber cell of the sisal plant, which can grow up to several feet in length.
The function of vacuole in class 8 is to store and maintain the proper balance of water, nutrients, and waste products in the cell. Vacuoles also help maintain the shape and structure of the cell.
The cell wall in class 8 is a rigid layer that surrounds the cell membrane of plant cells, bacteria, fungi, and some protists. It provides structural support and protection to the cell.
Genes in class 8 are segments of DNA that carry genetic information and determine traits such as eye color, hair color, and height.
The smallest cell is the Mycoplasma bacterium, which can be as small as 0.1 micrometers in diameter.
Chromosomes in class 8 are structures found in the nucleus of cells that contain genetic information. They are made up of DNA and proteins and carry the genetic information necessary for the growth, development, and function of all living organisms.
Protoplasm in class 8 is the living substance found within cells that contains all the necessary components for life, including cytoplasm, organelles, and the nucleus.
The function of the cell membrane in class 8 is to regulate the movement of substances in and out of the cell, as well as to provide structural support and protection to the cell.
The discovery of the cell in class 8 is credited to Robert Hooke, who first observed and described cells in cork tissue using a microscope in 1665.
The nucleus in class 8 is a membrane-bound organelle found in eukaryotic cells that contains the cell's genetic material and controls the cell's activities.
The lifespan of an elephant according to NCERT (National Council of Educational Research and Training) may vary, but typically they can live up to 60-70 years.
The shape of cells in class 8 can vary greatly depending on their function and type. For example, nerve cells are long and slender, while red blood cells are small and round.