DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
Answer:
Addition of a(n) methyl group to certain lysine residues of a histone protein makes the region of chromatin transcriptionally silent; addition of a(n) acetyl group to certain lysine residues makes the region of chromatin transcriptionally active.
Explanation:
The changes suffered in the expression and activity of the genes are studied by the Epigenetics.
Answer:
CO2, H2O, and energy
Explanation:
C6H12O6+6O2 --> 6CO2+6H2O+ATP Energy
To be clear, abiotic means non living things. The only thing that is living in the answer choices is C) fish population. Hope that helps.