BIOMOLECULES AND ENZYMES

BIOLOGY

STRUCTURE OF PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which most directly affects the sequence of amino acids in a protein?
A
the DNA in the nucleus of the cell
B
the amino acids found in the cytoplasm
C
the type of cell in which the protein is made
D
the region of the cell in which the protein is made
Explanation: 

Detailed explanation-1: -The majority of genes carried in a cell’s DNA specify the amino acid sequence of proteins; the RNA molecules that are copied from these genes (which ultimately direct the synthesis of proteins) are called messenger RNA (mRNA) molecules.

Detailed explanation-2: -So, the correct option is ‘The sequence of codons in mRNA’.

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: -Genetic Code: The sequence of nucleotides, coded in triplets (codons) along the mRNA, that determines the sequence of amino acids in protein synthesis. A gene’s DNA sequence can be used to predict the mRNA sequence, and the genetic code can in turn be used to predict the amino acid sequence.

Detailed explanation-5: -The nucleotide sequence of a gene, through the medium of mRNA, is translated into the amino acid sequence of a protein by rules that are known as the genetic code.

There is 1 question to complete.