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