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Q. No.The plasma membrane consists mainly of:
1.
phospholipids embedded in a protein bilayer
2.
proteins embedded in a phospholipid bilayer
3.
proteins embedded in a polymer of glucose molecules
4.
proteins embedded in a carbohydrate bilayer
Subtopic: Cell Membrane |
83%
AIPMT - 2010
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Alage have cell wall made up of:
| 1. | Cellulose, galactans and mannans |
| 2. | Hemicellulose, pectins and proteins |
| 3. | Pectins, cellulose and proteins |
| 4. | Cellulose, hemicellulose and pectins |
Subtopic: Cell Wall |
83%
From NCERT
AIPMT - 2010
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Middle lamella is mainly composed of:
1. hemicellulose
2. muramic acid
3. calcium pectate
4. phosphoglycerides
Subtopic: Cell Wall |
92%
From NCERT
AIPMT - 2009
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Plasmodesmata are:
| 1. | lignified cemented layers between cells |
| 2. | locomotory structures |
| 3. | membranes connecting the nucleus with plasmalemma |
| 4. | connections between adjacent cells |
Subtopic: Cell Wall |
84%
From NCERT
AIPMT - 2009
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The cytoskeleton is made up of:
| 1. | calcium carbonate granules |
| 2. | callose deposits |
| 3. | cellulosic microfibrils |
| 4. | proteinaceous filaments |
Subtopic: Cytoskeleton |
78%
From NCERT
AIPMT - 2009
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Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
| 1. | Both lipids and proteins can flip-flop |
| 2. | While lipids can rarely flip-flop, proteins cannot |
| 3. | While proteins can flip-flop, lipids cannot |
| 4. | Neither lipids nor proteins can flip-flop |
Subtopic: Evidence for Fluidic Nature of Membrane |
62%
AIPMT - 2008
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Polysome is formed by:
| 1. | several ribosomes attached to a single mRNA |
| 2. | many ribosomes attached to a strand of endoplasmic reticulum |
| 3. | a ribosome with several subunits |
| 4. | ribosomes attached in a linear arrangement |
Subtopic: Ribosome and Inclusion Bodies |
90%
From NCERT
AIPMT - 2008
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The two subunits of ribosome remain united at a critical ion level of:
1. copper
2. manganese
3. magnesium
4. calcium
1. copper
2. manganese
3. magnesium
4. calcium
Subtopic: Ribosome and Inclusion Bodies |
66%
AIPMT - 2008
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Vacuole in a plant cell:
| 1. | is membrane-bound and contains storage proteins and lipids |
| 2. | is membrane-bound and contains water and excretory substances |
| 3. | lacks membrane and contains air |
| 4. | lacks membrane and contains water and excretory substances |
Subtopic: Vacuole |
87%
From NCERT
AIPMT - 2008
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Which one of the following is not a constituent of the cell membrane?
1. Cholesterol
2. Glycolipids
3. Proline
4. Phospholipids
Subtopic: Cell Membrane |
87%
From NCERT
AIPMT - 2007
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