19. The term chromatin refers to
a. the color of certain cells
b. chromosomal DNA
c. the fluid within the nucleus
d. ribosomal RNA
Since this is not my area of expertise, I searched Google under the key words "chromatin" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=chromatin&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
To find the answer to this question, we can break down the options and determine which one is the correct definition of the term chromatin.
a. The color of certain cells: This option is incorrect as chromatin does not refer to the color of cells.
b. Chromosomal DNA: This option is correct. Chromatin refers to the complex of DNA and proteins that make up chromosomes in eukaryotic cells. It consists of DNA wrapped around proteins called histones.
c. The fluid within the nucleus: This option is incorrect. The fluid within the nucleus of a cell is called nucleoplasm, not chromatin.
d. Ribosomal RNA: This option is incorrect. Ribosomal RNA (rRNA) is a type of RNA involved in protein synthesis and is not directly related to chromatin.
Therefore, the correct answer is b. chromosomal DNA.