When Doing Gel Electrophoresis,why Do Researchers Add a "Ladder" Made

question 32

Multiple Choice

When doing gel electrophoresis,why do researchers add a "ladder" made up of molecules of known size?

• A)to help the molecules they are studying get through the gel more easily
• B)to help the researchers identify the size of each molecule after the separation has occurred
• C)to make sure the radioactivity doesn't interfere with the movement of the molecules that are being studied
• D)The molecules being studied would not show up without the ladder.

---

Definitions:

Local Environment

The immediate physical and biological surroundings of an organism, influencing its growth and development.

Change

Change refers to the process of becoming different in some particular way, without permanently losing one's or its former characteristics or essence.

Keystone Species

An essential species in an ecosystem that plays a key role in maintaining the balance, wherein its elimination would cause dramatic shifts in the ecosystem's dynamics.

Nutrient Cycling

The movement and exchange of organic and inorganic matter back into the production of living matter.