Question

complete the paragraph. most organisms use genetic code. there are different types of dna nucleotides. within a gene, each group of three nucleotides specifies a certain. copies of the instructions found in genes are carried by molecules of from the nucleus to the ribosomes, where are assembled.

Explanation:

Most organisms use a universal genetic code. There are 4 different types of DNA nucleotides (adenine - A, thymine - T, guanine - G, cytosine - C). Each group of three nucleotides (a codon) within a gene specifies a certain amino - acid. Messenger RNA (mRNA) molecules carry copies of gene instructions from the nucleus to the ribosomes, where proteins are assembled.

Answer:

1. universal
2. 4
3. amino - acid
4. mRNA
5. proteins