BIOLOGY
NUCLEIC ACIDS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
1
|
|
|
2
|
|
|
3
|
|
|
4
|
Detailed explanation-1: -A codon is a DNA or RNA sequence of three nucleotides (a trinucleotide) that forms a unit of genomic information encoding a particular amino acid or signaling the termination of protein synthesis (stop signals).
Detailed explanation-2: -The three-letter nature of codons means that the four nucleotides found in mRNA-A, U, G, and C-can produce a total of 64 different combinations.
Detailed explanation-3: -Most codons specify an amino acid. Three “stop” codons mark the end of a protein. One “start” codon, AUG, marks the beginning of a protein and also encodes the amino acid methionine.
Detailed explanation-4: -Answer and Explanation: Three codons are needed to specify three amino acids. Codons can be described as messengers that are located on the messenger RNA (mRNA). It is a sequence of three nucleotides that code for one specific amino acid; therefore, every three nucleotides represent one codon.
Detailed explanation-5: -Explanation: A codon codes for each specific amino acids, and is made up of a triplet of nucleotides, i.e. three nucleotides.