Single-celled eukaryotic organisms such as Amoeba and Paramecia often live in en
ID: 91675 • Letter: S
Question
Single-celled eukaryotic organisms such as Amoeba and Paramecia often live in environments that change quickly. Which of the following mechanisms would have NO effect on the ability of organisms like Amoeba to respond quickly to frequent short-term environmental changes? a. Altering the chromatin structure by the addition of acetyl groups. b. Control of initiation of transcription c. Increasing concentration of an enzyme by increasing initiation of translation d. Control of the amount of DNA present in the cell. e. Targeting a protein for recognition by proteasomes. Conserve energy and resources by making some proteins only when they are needed. If a protein is not needed, which of the following methods of control would be the most energy efficient? a. Block transcription initiation. b. Block translation of the mRNA. c. Degrade the mRNA after it is made. d. Degrade the protein after it is made.Explanation / Answer
20) The amount of DNA will remain unchanged with environmental changes.
21) Blocking of transcription initiation is most energy efficient because other steps need energy.