Chapter 5 BIOLOGY : The Fundamental Unit of Life — Online MCQ Test
SCIENCE · CLASS 9th · Andhra State Board
Practice Chapter 5 BIOLOGY : The Fundamental Unit of Life with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers discovery of cell plasma membrane cell wall cytoplasm cell organelles like nucleus mitochondria endoplasmic reticulum and cell division mechanisms..
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Chapter 5 BIOLOGY : The Fundamental Unit of Life — Important Questions & Answers
Who discovered the cell by observing a thin slice of cork under a self-designed microscope?
- A. Robert Brown
- B. Robert Hooke
- C. Purkinje
- D. Virchow
Answer: B. Robert Hooke
Robert Hooke discovered cells in 1665 when he observed cork slices under a primitive microscope.
Robert Hooke discovered cells in 1665 when he observed cork slices under a primitive microscope.
Which cell organelle is famously known as the 'powerhouse of the cell'?
- A. Ribosome
- B. Lysosome
- C. Mitochondria
- D. Golgi apparatus
Answer: C. Mitochondria
Mitochondria produce energy in the form of ATP, hence they are called the powerhouses.
Mitochondria produce energy in the form of ATP, hence they are called the powerhouses.
What is the main difference between smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER)?
- A. RER has ribosomes, SER does not
- B. SER has ribosomes, RER does not
- C. RER produces lipids, SER produces proteins
- D. Only SER is involved in protein transport
Answer: A. RER has ribosomes, SER does not
RER appears rough under the microscope due to the presence of ribosomes on its surface, while SER is smooth.
RER appears rough under the microscope due to the presence of ribosomes on its surface, while SER is smooth.
Which of the following is NOT a feature of plant cells?
- A. Large central vacuole
- B. Cell wall
- C. Centrioles
- D. Chloroplasts
Answer: C. Centrioles
Centrioles are typically found in animal cells and help in cell division, but are absent in most plant cells.
Centrioles are typically found in animal cells and help in cell division, but are absent in most plant cells.
If a scientist observes a cell without a distinct nucleus and membrane-bound organelles, it must be a:
- A. Plant cell
- B. Animal cell
- C. Prokaryotic cell
- D. Eukaryotic cell
Answer: C. Prokaryotic cell
Prokaryotic cells lack a defined nuclear membrane and membrane-bound organelles.
Prokaryotic cells lack a defined nuclear membrane and membrane-bound organelles.