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Biology CBSE Live product
Class 9 (2025-26)
The fundamental unit of life
Annual Revision II
8.
Cell organelles
Question:
3
m.
Provide an in-depth explanation for the question below:
Which organelle is known as the protein factories? Why?
a
.
Ribosomes are present in which of the following forms?
Only in nucleus
Only in mitochondria
Only in cytoplasm
Free or attached to ER
b
.
What is the main function of ribosomes?
Storage of waste
Protein synthesis
Energy production
Photosynthesis
c
.
Which type of ribosomes are found in prokaryotic cells?
70S
80S
60S
40S
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