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Class 9 ncert science chemistry notes

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March 24, 2025
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2024/2025
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Ashu ghai
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,Besides nucleus, DNA is also present in
(a) Ribosomes
(b) Mitochondria
(c) Lysosomes
(d) Golgi complex
ANSWER: (b) Mitochondria

,P and Q are cell organelles bound by single membrane.
P is filled with hydrolytic enzymes and Q is filled with cell sap.
Identify P and Q and select the incorrect statement regarding them.
(a) P is cellular housekeeper whereas Qis storage sac for liquid or so
contents.
(b) P takes part in autophagy and Q takes part in osmoregulation.
(c) P is exclusive to plant cell and Q is exclusive to animal cell.
(d) P is digestive bag whereas Q is storage bag of cells.
ANSWER: (c) P is exclusive to plant cell and Q is exclusive to animal

, The rough ER is so named because it has an abundance of
(a) mitochondria
(b) Lysosomes
(c) Golgi bodies
(d) ribosomes.
ANSWER: (d) ribosomes.
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