In humans<span>, </span>each cell<span> normally contains 23 pairs of </span>chromosomes<span>, for a total of 46.
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Answer:
first one is c and the second is d.
Explanation:
The pre-teen years occur during the juvenile <span>stage, from 9 to 11 years of age.</span>
DNA ligase is an enzyme that repairs irregularities or breaks in the backbone of double-stranded DNA molecules. It has important role in the process of DNA replication and DNA repair. It has three general functions: It seals repairs in the DNA, it seals recombination fragments, and it connects Okazaki fragments (small DNA fragments formed during the replication of double-stranded DNA). DNA ligase functions by forming a bond between the end of a “donor” nucleotide and the end of an “acceptor” nucleotide.