THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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by creating a new double helix structure
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by using its phosphate and sugar molecules
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by adding more hydrogen bonds to its structure
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by arranging certain nitrogen bases of a cell in a particular order
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Detailed explanation-1: -The mRNA interacts with a specialized complex called a ribosome, which “reads” the sequence of mRNA nucleotides. Each sequence of three nucleotides, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.)
Detailed explanation-2: -The order of nitrogen bases in the mRNA will determine the type and order of amino acids in a protein. Some codons do not code for amino acids; they provide instructions for assembling the protein. More than one codon can code for the same amino acid. However, for any one codon, there can be only one amino acid.
Detailed explanation-3: -Like words in a sentence, the DNA sequence of a gene determines the amino acid sequence for the protein it encodes. In the protein-coding region of a gene, the DNA sequence is interpreted in groups of three nucleotide bases, called codons. Each codon specifies a single amino acid in a protein.
Detailed explanation-4: -During transcription, the enzyme RNA polymerase (green) uses DNA as a template to produce a pre-mRNA transcript (pink). The pre-mRNA is processed to form a mature mRNA molecule that can be translated to build the protein molecule (polypeptide) encoded by the original gene.
Detailed explanation-5: -The order of nitrogen bases (A, T, C, G) determines the type of protein that is assembled.