Nucleus-Nuclear Membrane, Chromatin, Nucleolus NEET Questions

Biology - Cell Structure and Function

Nucleus-Nuclear Membrane, Chromatin, Nucleolus MCQ Questions


7.
Normally, the number of nuclei per cell is:
A.
Always two
B.
One (most common)
C.
Always three
D.
Always many
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ANSWER :
B. One (most common)
8.
Cells without a nucleus include:
A.
Mature mammalian erythrocytes (RBCs) and sieve tube elements of vascular plants
B.
Liver cells
C.
Skeletal muscle cells
D.
Nerve cells
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ANSWER :
A. Mature mammalian erythrocytes (RBCs) and sieve tube elements of vascular plants
9.
Mature mammalian RBCs are unique because they:
A.
Have a giant nucleus
B.
Have two nuclei
C.
Lack a nucleus (anucleate)
D.
Have multiple nuclei
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ANSWER :
C. Lack a nucleus (anucleate)
10.
Multinucleate cells (syncytium) include:
A.
Mammalian RBCs
B.
Sieve tube elements
C.
Skeletal muscle fibres in animals; fungal hyphae (coenocytic)
D.
Nerve cells
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ANSWER :
C. Skeletal muscle fibres in animals; fungal hyphae (coenocytic)
11.
A multinucleate condition due to repeated nuclear divisions WITHOUT cytoplasmic division is called:
A.
Coenocyte (in plants/fungi); syncytium (in animals)
B.
Plasmodium
C.
Ribosome
D.
Polysome
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ANSWER :
A. Coenocyte (in plants/fungi); syncytium (in animals)
12.
The nuclear envelope consists of:
A.
A single membrane
B.
Two parallel membranes (outer + inner) with a perinuclear space between them
C.
Four membranes
D.
Three membranes
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ANSWER :
B. Two parallel membranes (outer + inner) with a perinuclear space between them