In the fluid mosaic model of a plasma membrane:
 

1. Upper layer is non-polar and hydrophilic
2. The polar layer is hydrophobic
3. Phospholipids form a bimolecular layer in the middle part
4. Proteins form a middle layer

Subtopic:  Cell Membrane |
 61%
From NCERT
AIPMT - 2002
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Ribosomes are produced in:
1. Nucleolus
2. Cytoplasm
3. Mitochondria
4. Golgibody

Subtopic:  Ribosome and Inclusion Bodies |
 78%
From NCERT
AIPMT - 2002
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The mitotic spindle is mainly composed of which protein:
1. Actin
2. Tubulin
3. Actomyosin
4. Myoglobin

Subtopic:  Cilia & Flagella |
 85%
From NCERT
AIPMT - 2002
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Which of the following ribosomes are engaged in protein synthesis in the animal cell:
 

1. Ribosomes that occur on the nuclear membrane and E.R.
2. Ribosomes of only cytosol
3. Ribosomes of only nucleolus and cytosol
4. Ribosomes of only mitochondria and cytosol
Subtopic:  Ribosome and Inclusion Bodies |
 80%
From NCERT
AIPMT - 2000
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Extranuclear DNA is found in:

1. Lysosome and chloroplast

2. Chloroplast and mitochondria

3. Mitochondria and lysosome

4. Golgi and E.R.

Subtopic:  Plastids | Mitochondria |
 92%
From NCERT
AIPMT - 2000
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Lysosome contains:

1. Oxidative enzymes 2. Hydrolytic enzymes
3. Reductive enzymes 4. Anabolic enzymes
Subtopic:  Lysosomes |
 96%
From NCERT
AIPMT - 2000
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Chromosomes in a bacterial cell can be 1–3 in number and:
 

1. Are always circular
2. Are always linear
3. Can be either circular or linear, but never both within the same cell
4. Can be circular as well as linear within the same cell
Subtopic:  Details of Prokaryotic Cell Structure |
 50%
From NCERT
AIPMT - 2003
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The difference in gram ⊕ and gram Θ bacteria is due to:
1. Cell wall
2. Cell membrane
3. Ribosome
4. Cytoplasm

Subtopic:  Bacterial Staining & Shape |
 73%
From NCERT
AIPMT - 2001
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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 |
 86%
From NCERT
AIPMT - 2001
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Element necessary for the middle lamella:
1.  Ca
2.  Zn
3.  K
4.  Cu

Subtopic:  Cell Wall |
 94%
From NCERT
AIPMT - 2001
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