Chapter 5: The Fundamental Unit of Life
Learning Notes (Set 3) for Class 9 Science
Exam oriented Study Guide for CBSE Class 9 Science
Here are 10 quick question-and-answer notes to help you revise the key concepts from the chapter on The Fundamental Unit of Life. Use these for a quick study session before your exam!
Question 1: What are the main components of chromosomes?
Answer: Chromosomes are composed of DNA and protein.
Question 2: What is the main function of the Smooth Endoplasmic Reticulum (SER)?
Answer: The SER helps in the synthesis and transport of lipids and steroids, and also detoxifies many poisons and drugs.
SOURCE: WWW.QUIZNEST.INQuestion 3: What is the name for the fluid content of the cell?
Answer: The fluid content inside the plasma membrane is called cytoplasm.
You are on Chapter 5: The Fundamental Unit of Life (Learning Notes for Class 9 Science) Set 3
Question 4: What is the role of mitochondria?
Answer: Mitochondria are responsible for releasing energy in the form of ATP, which is why they are known as the powerhouse of the cell.
Question 5: What is the difference in cell shape between a plant cell and an animal cell?
Answer: A plant cell is typically rigid and rectangular due to the cell wall, while an animal cell is usually round and irregular.
Question 6: What are plastids and where are they found?
Answer: Plastids are large organelles found only in plant cells, of which chloroplasts are the most common.
SOURCE: WWW.QUIZNEST.INQuestion 7: What is the function of the cell wall in a plant cell?
Answer: The cell wall provides structural support, protection, and prevents the cell from bursting when it is in a hypotonic solution.
Question 8: What is the nucleoid region in a prokaryotic cell?
Answer: The nucleoid is the ill-defined region in a prokaryotic cell where the genetic material is located without a nuclear membrane.
You are on Chapter 5: The Fundamental Unit of Life (Learning Notes for Class 9 Science) Set 3
Question 9: What is the process of a cell engulfing food called?
Answer: The process of a cell taking in food from its external environment is called endocytosis.
Question 10: How does an amoeba maintain its water balance?
Answer: The contractile vacuole in an amoeba plays a key role in expelling excess water from the cell to maintain water balance.
SOURCE: WWW.QUIZNEST.IN
