Cells Are Often Ground Up with Abrasive to Get to Their

question 22

Multiple Choice

Cells are often ground up with abrasive to get to their internal enzymes/molecules,followed by removal of the abrasives.Here are three situations and three outcomes.What is the correct interpretation of the results? In situation #1,radioactive amino acids are added to cell material,and radioactive proteins are produced.In situation #2,radioactive amino acids,cell material,and the enzyme DNAse (degrades DNA) are added together.Radioactive proteins are still produced.In situation #3,the ground-up cell material is allowed to sit for 24 hours before radioactive amino acids and DNAse are added to it.No radioactive protein is produced.What is the most likely interpretation?

• A)RNA polymerase has no activity after 24 hours,so no mRNA is transcribed and translated into radioactive proteinsin the last scenario.
• B)The radioactivity in the amino acids is altering/degrading the tRNA molecules,leading to no protein production in the last scenario.
• C)Natural RNAses present in the ground-up material will degrade any existing mRNAs in that 24-hour interval.Added DNAses breakdown DNA so that new RNAs are not synthesized.This will lead to a loss of capability to translate protein in the last scenario.
• D)The results are not interpretable from the information given.

---

Definitions:

Doubt

A feeling of uncertainty or lack of conviction about something, often prompting further inquiry or reflection.

Existence

The state or fact of being real or alive; having reality or life.

Prove

Demonstrate that a statement or proposition is true, either by using argumentation or by presenting evidence.

Happiness Box

A conceptual tool or physical repository used for storing memories, thoughts, or items associated with happiness and joy.