Non-coding dna that lies between genes:
a. regulatory regions
b. exons
c. intergenic regions
d. introns

Introns.

Explanation:

The RNA transcript consists of the both the exons and the introns region. The exons are the coding region of the RNA that codes for the particular amino acids.

The introns are the interrupted sequences between the exon. These sequences does not code for any proteins but helps in the alternative splicing. The introns are not present in case of prokaryotes.

Thus, the correct answer is option (d).

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

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