B cells produce antigen
t cell are helper,killer,memory cells
they hold memory of pathogens i the system
Answer:
precipitation is the answer of this question
Answer:
Theme is the central idea or insight about life
Explanation:
Answer:
A. The tails do not interact with the DNA
Explanation:
The acetylation refers to the transfer of the acetyl group from Acetyl-CoA to the N-terminal of the histone protein.
Lysine residues (positively charged amino acid) are present at the end of the N-terminal of the histone protein which is neutralized by the acetyl group.
This loses the compaction between the positively charged histone and the negatively charged DNA and the DNA becomes more relaxed. This relaxed state allows the transcription factors to easily bind the DNA and therefore the DNA becomes transcriptionally active.
Thus, Option-A is correct
Decomposers break down dead animals and plants. They usually benefit producers by releasing nutrients back in the soil.