Question

question 12
2 pts
in what part of the nucleus does ribosome production occur?
○ in the area of the nucleolus
○ in the chromatin
○ ribosome production does not occur in the nucleus
○ within nuclear pores

question 13
2 pts
chromosomes align midway between centrioles during what phase of mitosis?
○ metaphase
○ prophase
○ anaphase
○ telophase

Explanation:

• Question 12: The nucleolus is a dense - spherical structure within the nucleus. It is the site where ribosomal RNA (rRNA) is synthesized and ribosomal subunits are assembled. Chromatin is the complex of DNA and proteins in the nucleus and is mainly involved in packaging and regulating DNA. Nuclear pores are for transport of molecules in and out of the nucleus. Ribosome production does occur in the nucleus (specifically the nucleolus).
• Question 13: In metaphase of mitosis, chromosomes align at the metaphase plate (midway between the centrioles). In prophase, chromosomes condense and the nuclear envelope breaks down. In anaphase, sister chromatids separate. In telophase, the nuclear envelope reforms and chromosomes de - condense.

Answer:

• Question 12: In the area of the nucleolus
• Question 13: Metaphase