Answer: organisms need energy to conduct essential life activities
Explanation:
They are both relatively strong bonds. however, hydrogen bonding is more stronger then ionic bonds and the h only bonds with the "f o n" elements. Ionic bods on the other hand are bonds between a metal element and a non metal element.
<h2>Epigenetic modification </h2>
Explanation:
A methyl group bound to DNA inhibits transcription of a gene describes an epigenetic modification
Epigenetic modifications include: histone modifications and methylation
Methylation is the main cause of gene silencing for example methylation at lysine residue of histone protein, H4 leads to gene repression
Small silencing RNA molecules are of two types: micro RNA (miRNA) and small interfering RNA (siRNA)
miRNA directs degradation of target mRNA when makes perfect complementary while suppress mRNA translation when makes partial or imperfect complementary
siRNA primarily mediates degradation of target RNA
The answer should be pH = 8.40.
Hope this helps.
prophase is the first stage and it looks like all the chromatin condenses into chromosomes and the nucleus dissolves (there is no nucleus when you look at it)