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Explanation: Mitochondria are known as the powerhouses of the cell because they generate ATP, which is the energy currency used for various cellular activities. This energy is crucial for sustaining life processes within the cell.
Explanation: Mitosis is the type of cell division that produces two identical daughter cells, allowing for growth and repair of tissues in multicellular organisms. It is essential for replacing damaged or dead cells.
Explanation: Eukaryotic cells are characterized by the presence of a well-defined nucleus and membrane-bound organelles, unlike prokaryotic cells, which lack these structures. This distinction is fundamental in cell biology.
Explanation: Lysosomes are membrane-bound organelles that contain digestive enzymes to break down waste materials and cellular debris. They are often referred to as the 'suicide bags' of the cell due to their role in autophagy.
Explanation: The cell membrane is crucial as it acts as a barrier that regulates the movement of substances in and out of the cell, maintaining homeostasis. It is selectively permeable, allowing only certain molecules to pass through.
Explanation: Robert Hooke is credited with the discovery of cells in 1665 when he observed a cork slice under a primitive microscope. His observations led to the naming of the compartments as 'cells', which means 'little rooms' in Latin.
Explanation: Cell theory states that the cell is the basic structural and functional unit of all living organisms. This theory was formulated by Schleiden and Schwann in the 19th century.
Explanation: The cell wall is a rigid structure that surrounds plant cells, allowing them to withstand hypotonic environments without bursting. It provides structural support and protection.
Explanation: The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles. It plays a crucial role in the cell's transport system.
Explanation: Prokaryotic cells, such as bacteria, do not have a defined nucleus or nuclear membrane. Their genetic material is located in a region called the nucleoid.
Explanation: Mitochondria are known as the powerhouse of the cell because they are responsible for producing ATP, the energy currency of the cell, through cellular respiration.
Explanation: Ribosomes are the cellular structures responsible for synthesizing proteins by translating messenger RNA (mRNA) into polypeptide chains.
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