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 to each other in a linear arrangement

Subtopic:  Ribosome and Inclusion Bodies |
 90%
From NCERT
NEET - 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

Subtopic:  Ribosome and Inclusion Bodies |
 67%
NEET - 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 |
 86%
From NCERT
NEET - 2008
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In germinating seeds fatty acids are degraded exclusively in the

1. proplastids

2. glyoxysomes

3. peroxisomes

4. mitochondria

Subtopic:  Microbodies |
 68%
NEET - 2008
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Which one of the following is not a constituent of cell membrane ?

1. Cholesterol

2. Glycolipids

3. Proline

4. Phospholipids

Subtopic:  Cell Membrane |
 87%
From NCERT
NEET - 2007
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Lysozyme that is present in perspiration, saliva and tears, destroys:

1. certain fungi

2. certain types of bacteria

3. all viruses

4. most virus-infected cells

Subtopic:  Endomembrane System (Lysosomes) |
 83%
NEET - 2007
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Select the wrong statement from the following:

1. both chloroplasts and mitochondria contain an inner and an outer membrane

2. both chloroplasts and mitochondria have an internal compartment, the thylakoid

space bounded by the thylakoid membrane

3. both chloroplasts and mitochondria contain DNA

4. the chloroplasts are generally much larger than mitochondria

Subtopic:  Plastids | Mitochondria |
 82%
From NCERT
NEET - 2007
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Which of the following statements regarding mitochondrial membrane is not correct?

1. The outer membrane is permeable to all kinds of molecules

2. The enzymes of the electron transfer chain are embedded in the outer membrane

3. The inner membrane is highly convoluted forming a series of infoldings

4. The outer membrane resembles a sieve

Subtopic:  Mitochondria |
 63%
NEET - 2006
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Which of the following statements regarding cilia is not correct ?

1. The organized beating of cilia is controlled by fluxes of Ca2+ across the membrane

2. Cilia are hair-like cellular appendages

3. Microtubules of cilia are composed of tubulin

4. Cilia contain an outer ring of nine doublet microtubules surrounding two single

microtubules

Subtopic:  Cilia & Flagella |
 59%
NEET - 2006
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The organelle common among prokaryotic and eukaryotic cell is

(1) centrosome

(2) ribosome

(3) peroxisome

(4) glyoxysome

Subtopic:  Cell Organisation |
 94%
From NCERT
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