Free radicals in our body have been implicated in
1. ageing
2. certain degenerative disorders
3. neurodegeneration
4. all the above
If there were present no subcellular organelles in a eukaroytic cell, the rate of
metabolism will
1. increase
2. decrease
3. not change
4. increase dramatically.
Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?
| 1. | Lysosomes are double membraned vesicles budded off from Golgi apparatus and contain digestive enzymes. |
| 2. | Endoplasmic reticulum consists of a network of membranous tubules and helps in transport, synthesis and secretion |
| 3. | Leucoplasts are bound by two membranes, lack pigment but contain their own DNA and protein synthesizing machinery. |
| 4. | Sphaerosomes are single membrane bound and are associated with synthesis and storage of lipids. |
In which one of the following would you expect to find glyoxysomes?
1. Endosperm of wheat
2. Endosperm of castor
3. Palisade cells in leaf
4. Root hairs
Which one of the following structure is an organelle within an organelle?
1. Ribosome
2. Peroxysome
3. ER
4. Mesosome
Which of the following four cell structures is correctly matched with the accompanying description?
| 1. | Plasma membrane - Outer layer of cellulose or chitin, or absent |
| 2. | Mitochondria - Bacteria like elements with inner membrane forming sacs containing chlorophyll, found in plant cells and algae |
| 3. | Chloroplasts - Bacteria like elements with inner membrane highly folded |
| 4. | Golgi apparatus - Stacks of flattened vesicles |
How many of the following cell organelles are membranous?
Endoplasmic reticulum, Nucleus, lysosomes, vacuoles, ribosomes, centrioles
(1)6
(2)5
(3)4
(4)2
In which of the following cell organelles ribosomes are present?
| 1. | cytoplasm |
| 2. | Mitochondria and chloroplast |
| 3. | Nucleus, Mitochondria and chloroplast |
| 4. | cytoplasm, Mitochondria and chloroplast |
Which of the following is a membraneless organelle
1. Ribosome
2. Nucleolus
3. Basal Body
4. All of these
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