Answer:
A
Explanation:
Exons are what are needed in the processing mRNA hence cannot be cut out. The regions that are cut out are introns and mainly emanate from non-protein-coding region of DNA. During RNA processing the mRNA is capped at the 5’ end and three (3) adenine nucleotides are added on 3’ end of the RNA- in a process called polyadenylation –to stabilize the mRNA. This processing is carried out by enzymes such as ribozymes and spliceosomes. RNA requires to be processed before it exits the nucleus.
B! The strongest characteristics will survive when the weak ones won't
Answer:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.
While The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.
Explanation:
