HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A section of mRNA that codes for a polypeptide chain
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A section of DNA that codes for a protein
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A section of DNA that codes for a polypeptide chain
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A section of mRNA that codes for a protein
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Detailed explanation-1: -One of the definitions of a gene is as follows: a segment of deoxyribonucleic acid (DNA) carrying the code for a specific polypeptide. Each molecule of messenger RNA (mRNA) is a transcribed copy of a gene that is used by a cell for synthesizing a polypeptide chain.
Detailed explanation-2: -The segment of DNA molecules which codes or specifies for one polypeptide chain is called as gene. A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, acts as instructions to make proteins.
Detailed explanation-3: -(jeen) The basic unit of heredity passed from parent to child. Genes are made up of sequences of DNA and are arranged, one after another, at specific locations on chromosomes in the nucleus of cells.
Detailed explanation-4: -A gene sequence is converted into a polypeptide sequence via two processes: Transcription – making an mRNA transcript based on a DNA template (occurs within the nucleus) Translation – using the instructions of the mRNA transcript to link amino acids together (occurs at the ribosome)