B is the correct answer sir
Below statements are true:
<span>Acetylation of histone tails is a reversible process.
</span><span>Acetylation of histone tails in chromatin allows access to DNA for transcription.
</span><span>DNA is not transcribed when chromatin is packaged tightly in a condensed form.
</span><span>Methylation of histone tails in chromatin can promote condensation of the chromatin.
</span><span>Some forms of chromatin modification can be passed on to future generations of cells.</span>
Prokaryotic chromosomes are found in the nucleoid of prokaryotic cells, and they are circular in shape
Answer: pulmonary artery carries deoxygenated blood away from the heart
The correct answer is stem cell research and animal testing.
