In DNA, there are 4 different kinds of nucleotides. A, T, C and G
In RNA, there are also 4, but T has been replaced by U. (I think. It's been awhile)
So there are 81 combos that you might see in real life, but there are 243 that you could prepare in a lab.
It has four.
There are 9 * 8 * 7, or 504, three letter permutations that can be made from the letters in the work CLIPBOARD.
6
Six.
There are 13 combinations.
Three nucleotides makes up each codon. The codons consist of combination of 4 differing nucleotides A,G,T, and C.
Nine nucleotides are needed to specify three amino acids.
A three-nucleotide sequence makes up a codon.
three
Three
three.
Three.
Four Nucleotides
42 = 16 possible codons.
3 nucleotides
Every codon is three nucleotide pairs, so you would have 25 codons.
576, because there are 191 amino acids in human growth hormone. 191x3= 573, but then you add three to account for the nucleotides that act as a stop codon.