DNA is made of molecules called molecules nitrogen such as

DNA is made of molecules (called) molecules & nitrogen (such as and Cytosine pairs with. Thymine pairs with. This is called the base- rule. Each strand is held together by weak bonds. DNA is for making a protein molecule. mRNA copies the code from one strand of. mRNA takes the code to the. The de is then to an amino acid chain. The amino acid chain forms a .

Solution

6.

a. double helix, nucleotides,

b. Phosphate molecules

c. nitrogen such as adenine, thymine, guanine, and cytosine

7. cytocin pair with guanine,

Thymin pairs with addenine and it is known as base-Watson-Crick rule

8. weak hydrogen bond

9.mRNA

10. DNA

11. tRNA (ribosomes)

12. tRNA

13. poly peptide chain