Which one of the following cellular parts is correctly described ?
1. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
2. Centrioles - sites for active RNA synthesis
3. Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)
4. Lysosomes - optimally active at a pH of about 8.5

Subtopic:  Plastids |
 88%
From NCERT

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Match the following and select the correct answer :

(a) Centriole (i) Infoldings in mitochondria
(b) Chlorophyll (ii) Thylakoids
(c) Cristae (iii) Nucleic acids
(d) Ribozymes (iv) Basal body cilia or flagella
 
A B C D
1. (iv) (ii) (i) (iii)
2. (i) (ii) (iv) (iii)
3. (i) (iii) (ii) (iv)
4. (iv) (iii) (i) (ii)
Subtopic:  Plastids | Mitochondria | Cilia & Flagella |
 90%
From NCERT

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Extranuclear chromosomes occur in:

1. Peroxisome and ribosome 2. Chloroplast and mitochondria
3. Mitochondria and ribosome 4. Chloroplast and lysosome
Subtopic:  Plastids | Mitochondria |
 87%
From NCERT
AIPMT - 2001

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In a eukaryotic cell, the two organelles that can transform energy are:
1. bound by a single membrane
2. parts of the endomembrane system
3. present only in the plant cells
4. semi-autonomous

Subtopic:  Plastids | Mitochondria |
 84%

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