Which Kind of DNA Should Provide the Best Molecular Clock

question 41

Multiple Choice

Which kind of DNA should provide the best molecular clock for determining the evolutionary relatedness of several species whose common ancestor became extinct billions of years ago?

• A) that coding for ribosomal RNA
• B) intronic DNA belonging to a gene whose product performs a crucial function
• C) paralogous DNA that has lost its function (i.e., no longer codes for functional gene product)
• D) mitochondrial DNA
• E) exonic DNA that codes for a noncrucial part of a polypeptide

---

Definitions:

Indirect

In a manner or by means not directly explicit; involving an intermediary or secondary channel.

Direct

The process or manner of communication or transaction that happens without any intermediaries.

Channel Conflict

A situation where channels in a distribution chain are in competition with each other or interfere, leading to reduced efficiency or sales.

Vertical

An industry or market in which businesses provide products or services specific to a particular niche, focusing on a tightly defined area of operation.