In which direction does dna replication take place?
5'-3'
3'-5'
5'
3'

In the 5'-3' direction

Explanation:

DNA is made up of nucleotides which are derived from phosphate, nucleobase and a deoxyribose, which is a sugar molecule. Addition of a new nucleotide requires a free hydroxyl group (-OH) of the sugar molecule. This is usually at 3' end of the DNA strand. Thus, the DNA polymerase reads the strand from the 5'-3' end adding a new nucleotide at the 3' end.

every el niño cycle is different. every year.

that is wrong, its not thymus.