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.
I believe it’s A.
If I’m wrong I’m sorry I think that’s what they said in school
Urethral orifice or the urinary aperture is the location where the urine is being excreted from the body of an organism. In the case of rats, if its a male rat, the urine is excreted through the urogenital opening- which means that such orifice serves as an opening for both sperm and urine, alternately. For the female rat, just like humans, it is a singular opening
Answer:
Explanation:
Nerve cell as they send electrical impulses.
It cant be cardiac cell as that is in the heart.
And the epitherial cell covers the inside and outside off the stomach