In the context of chromosome structure, what do the dark and light bands represent?

Explain how and why chromatin is condensed in the nucleus.

Which of the following statements correctly describes the function of the nucleolus?

a. Within the nucleolus we find genes for rRNA.

b. Nucleoli manufacture mitochondrial proteins for export to the cytosol.

c. Nucleoli assemble the nuclear envelope.

d. The nucleolus contains the genes that form the Golgi apparatus.

Our somatic cell nuclei contain___pairs of chromosomes.

(a) 8

(b) 16

(c) 23

(d) 46

A collection of DNA and associated proteins in a cell defines the term: