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L7&8 , Nucleus, Histology

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MCQ 




1. The outer layer of the nuclear envelope:

a. Is smooth.

b. Is granular
.
c. Shows cristae.

d. Is fibrillar.




2. Concerning the nuclear pores:

a. Triangular openings at intervals.

b. Inner & outer nuclear membranes do not use at the pore.

c. Concerned with import of RNA to the nucleus.

d. Its proteins form octagonal ring.





3. Chromatin Islands are:

a. Attached to the inner surface of nuclear envelope.

b. Arranged in clumps scattered in the nuclear sap.

c. Condensed around the nucleolus.

d. Fine granules scattered in the cytoplasm.




4. Concerning euchromatin:

a. Represents newly formed strands of rRNA

b. Appears as condensed masses in nucleus.

c. Contains inactive genes that direct protein synthesis.

d. Makes the nucleus vesicular.




5. Pars amorpha of the nucleolus:

a. Represents coiled parts of chromatin.

b. Represents granules of mature rRNA.

c. Represents parts of chromosomes encoding for rRNA.

d. Represents the light areas of nuclear sap.




6. Pars fibrosa of the nucleolus:

a. Represents newly formed rRNA.

b. Represents mature rRNA.

c. Represents chromosomes encoding for rRNA.

d. Represents light areas of nucleolar sap.




7. Pars granulosa of the nucleolus:

a. Represents newly formed rRNA.

b. Represents mature rRNA.

c. Represents chromosomes encoding for rRNA.

d. Represents light areas of nucleolar sap

Answers 

1-B
2-D
3-B
4–D
5-C
6-A
7-B




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