细胞生物学选择题及答案(12)

细胞生物学选择题

118. All of the following statements are true about metaphase chromosomes except ( C )。

a. Metaphase chromosomes contain histone proteins.

b. Metaphase chromosomes contain nonhistone proteins.

c. Metaphase chromosomes are less condensed than interphase chromosomes.

d. Metaphase chromosomes contain a protein scaffold.

119. 染色体中具有防止染色体末端粘着作用的特化部位称为（ D ）。

A、主缢痕 B、次缢痕 C、动粒 D、端粒

120. 核仁组织区通常位于染色体的（ C ）。

A、主缢痕 B、着丝粒 C、次缢痕 D、随体

121. A threadlike material called chromatin is located within the ___A____.

A. nucleus B. endoplasmic reticulum

C. golgi apparatus D. lysosome

122. Where is ribosomal RNA produced? C

A. golgi apparatus

B. ribosomes

C. nucleolus

D. endoplasmic reticulum

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