OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Series of two letter sequences
|
|
|
Series of three letter sequences
|
|
|
Series of four letter sequences
|
|
|
Made up biology word
|
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). There are 64 different codons: 61 specify amino acids and 3 are used as stop signals.
Detailed explanation-2: -The genetic code is a set of three-letter combinations of nucleotides called codons, each of which corresponds to a specific amino acid or stop signal. The concept of codons was first described by Francis Crick and his colleagues in 1961.
Detailed explanation-3: -A start codon is made up of the letters ATG, which codes for the amino acid methionine. When the machinery of the cells sees that first ATG, it knows to start making the protein there. The code is always read in groups of three, so the start codon also gives the cell’s machinery it’s so-called reading frame.
Detailed explanation-4: -The bases in mRNA are grouped into sets of three called codons.