There are over fifty modified bases in tRNAs. Are the nucleotides modified before or after incorporation into the tRNA?
What will be an ideal response?
Ans: They are modified after transcription of the tRNA. If the modifications occurred on free nucleotides then all cellular RNAs would contain them. Modifying enzymes alter the nucleotides at specific positions in tRNAs by recognizing both the sequence and the structure of those regions.
You might also like to view...
Summarize the steps involved with the inflammatory response
What will be an ideal response?
When a hormone binds to a receptor, the resulting molecule is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
What effect would an "endocrine disruptor" that blocks thyroxine have on amphibians?
What will be an ideal response?
It is possible to build a light microscope capable of 10,000× magnification, but the image would not be sharp because resolution is independent of magnification.
Answer the following statement true (T) or false (F)