Nucleus-Nuclear Membrane, Chromatin, Nucleolus NEET Questions

Biology - Cell Structure and Function

Nucleus-Nuclear Membrane, Chromatin, Nucleolus MCQ Questions


13.
The space between the two nuclear membranes is called:
A.
Lumen
B.
Perinuclear space (10–50 nm wide)
C.
Nucleoplasm
D.
Cytoplasm
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ANSWER :
B. Perinuclear space (10–50 nm wide)
14.
The width of the perinuclear space is approximately:
A.
100 to 500 nm
B.
10 to 50 nm
C.
1 to 5 µm
D.
1 to 5 nm
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ANSWER :
B. 10 to 50 nm
15.
The nuclear envelope forms a barrier between:
A.
Materials inside the nucleus and the cytoplasm
B.
Two cells
C.
Nucleus and mitochondria only
D.
Two daughter nuclei
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ANSWER :
A. Materials inside the nucleus and the cytoplasm
16.
The OUTER nuclear membrane is usually continuous with:
A.
The plasma membrane
B.
Mitochondrial outer membrane
C.
The endoplasmic reticulum (ER) and may bear ribosomes on it
D.
The Golgi apparatus
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ANSWER :
C. The endoplasmic reticulum (ER) and may bear ribosomes on it
17.
Nuclear pores are formed by:
A.
Continuous gaps along the membrane
B.
Holes in the outer membrane only
C.
Fusion of the two membranes (outer + inner) at certain points
D.
Holes in the inner membrane only
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ANSWER :
C. Fusion of the two membranes (outer + inner) at certain points
18.
The function of nuclear pores is:
A.
Storage of enzymes
B.
Synthesis of DNA
C.
Holding nucleoplasm together
D.
Bidirectional passage of RNA and protein molecules between nucleus and cytoplasm
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ANSWER :
D. Bidirectional passage of RNA and protein molecules between nucleus and cytoplasm