Answer:
A. Helicase
Explanation:
Two replication forks are formed by the opening of the double-stranded DNA at the origin, and helicase separates the DNA strands, which are coated by single-stranded binding proteins to keep the strands separated. DNA replication occurs in both directions
What’s the question????????????
<span>A
section of DNA that is not expressed in the gene product is called
intron. The final messenger RNA molecule is called exon. Eukaryotic cells have
the enzyme to cut off the intron section to produce a continuous strand
of mRNA so that protein synthesis can occur. Prokaryotic cells can
express the information to produce protein directly as the mRNA does not
contain intron. </span>
Answer:
Pertussis.
Explanation:
Vaccine is given as the preventable measure for the particular disease. Vaccine may contain the weakened or killed antigen, the epitope part of any antigen and the particular DNA or protein.
Pertussis is also known as whooping cough that affects the respiratory system of an individual and can cause pneumonia as well. The vaccine for the pertussis is available in the hospitals for the prevention of pertussis in the future generation.
Thus, the correct answer is pertussis.
Valence Electrons are on the outer shell of a atom. The outer shell is also known as the valence shell so outer electrons or valence electrons are on the outer shell or valance shell.