Class 9 > CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute > Golgi Apparatus & Lysosomes - Cell Biology - Class 9 - Science
Golgi Apparatus & Lysosomes - Cell Biology - Class 9 - Science Video Lecture - CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute
FAQs on Golgi Apparatus & Lysosomes - Cell Biology - Class 9 - Science Video Lecture - CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute
| 1. What is the function of the Golgi apparatus in a cell? |  |
Ans. The Golgi apparatus is responsible for processing, packaging, and sorting proteins and lipids within the cell. It modifies these molecules by adding sugar chains and other groups, and then packages them into vesicles for transport to their final destination within or outside the cell.
| 2. How does the Golgi apparatus differ from the endoplasmic reticulum? | |
Ans. The Golgi apparatus and the endoplasmic reticulum (ER) are both involved in the processing and transport of proteins, but they have distinct functions. The ER is responsible for synthesizing proteins and lipids, while the Golgi apparatus modifies and packages these molecules. Additionally, the ER is a continuous network of tubules and sac-like structures, while the Golgi apparatus is organized into flattened stacks of membrane-bound compartments.
| 3. What is the role of lysosomes in a cell? | |
Ans. Lysosomes are membrane-bound organelles that contain powerful digestive enzymes. Their main function is to break down and recycle cellular waste materials, such as damaged organelles, foreign substances, and cellular debris. They also play a role in cellular processes like autophagy, where they digest and recycle unnecessary or dysfunctional cellular components.
| 4. How do lysosomes maintain the pH balance within a cell? | |
Ans. Lysosomes maintain an acidic pH (around 4.5-5.0) within the cell by actively pumping protons (H+) into their lumen. This is achieved through the action of a proton pump located in the lysosomal membrane. The acidic pH is crucial for the optimal functioning of lysosomal enzymes, which require an acidic environment to be active and efficient in breaking down cellular waste.
| 5. What happens if lysosomes malfunction in a cell? | |
Ans. If lysosomes malfunction, they can lead to various diseases and disorders. For example, lysosomal storage diseases occur when specific enzymes responsible for breaking down certain molecules are absent or non-functional, causing these molecules to accumulate within lysosomes. This can result in cellular dysfunction, organ damage, and various symptoms depending on the specific disease. Examples of lysosomal storage diseases include Tay-Sachs disease and Gaucher's disease.
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