How many nucleotides are needed to code for a protein with 300 amino acids?
How many nucleotides are needed to code for a protein with 300 amino acids?
The answer is C, 1800 nucleotides . Here’s why: Each amino acid residue in a polypeptide chain was coded for by 3 nucleotides called a codon. With this in mind, a polypeptide with 300 amino acids would need a minimum of 900 nucleotides to code for it (3 x 300 = 900).
How many amino acids are in 300 nucleotides?
Explanation: Each amino acid corresponds to codons; sequences of 3 base pairs. If you have 300 base pairs, you get 100 codons. However, you only get 99 amino acids in the protein as the last codon is a stop codon with terminates protein synthesis.
How many nucleotides would you hypothesize are in a codon in order to accommodate 300 amino acids?
Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases). The adaptor molecule for translation is tRNA….
| Radioactive | Asparagine |
|---|---|
| 1146 | |
| 24.2 | |
| Observed | 20 |
Why are there 3 bases per codon?
DNA is comprised of 4 different nucleotides (A, C, T, and G), whereas proteins are made of 20 amino acids. Codons are nucleotide triplets that encode for amino acids. Thus, in order for the 4 nucleotides to account for all 20 amino acids, a minimum of 3 base pairs are required.
How many bases form a codon?
three
Codons are made up of any triplet combination of the four nitrogenous bases adenine (A), guanine (G), cytosine (C), or uracil (U). Of the 64 possible codon sequences, 61 specify the 20 amino acids that make up proteins and three are stop signals.
What is the section of DNA that codes for a protein?
exons
The sections of DNA (or RNA) that code for proteins are called exons. Following transcription, new, immature strands of messenger RNA, called pre-mRNA, may contain both introns and exons.