Answer:
A) A transgene integrated into a heterochromatic region of the genome.
Explanation:
This is most likely the reason why the transgene is not expressed in the fifth cell line. It is likely that the transgene was integrated into a heterochromatic region of the genome. Heterochromatin consists of genetically inactive satellite sequences, and many of these are repressed to various extents. Moreover, because this is a tightly packed form of DNA or condensed DNA, it is inaccesible to polymerases and thus not transcribed.
Answer:
Cells on either side of the cut pull toward each other until they close the gap.
~Hope this helps!~
I think b would fit more as the mitochondria, d would be the endoplasmic reticulum, and e would be lysosomes
I think the answer is oxygen, but not 100% sure
