OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5 carbon sugar
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Phosphate back bone
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Amino acids
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None of the above
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Detailed explanation-1: -The correct answers are (b) and (d). The nucleic acids consist of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Detailed explanation-2: -Nucleic acids are composed of building blocks called nucleotides, which consist of one pentose sugar, a nitrogenous base, and a phosphate group. Amino acids are the building blocks of proteins and enzymes, not nucleic acids.
Detailed explanation-3: -Nucleic acids are made of nitrogen-containing bases, phosphate groups, and sugar molecules. Each type of nucleic acid has a distinctive structure and plays a different role in our cells.
Detailed explanation-4: -Ribosomal RNA (rRNA) and transfer RNA (tRNA) Transfer RNAs (tRNAs) are also involved in protein synthesis, but their job is to act as carriers – to bring amino acids to the ribosome, ensuring that the amino acid added to the chain is the one specified by the mRNA.
Detailed explanation-5: -The longest mRNA a 300 base DNA molecule could encode is 300 bases. Each codon (codes for an amino acid) is 3 bases in length. Divide 300 by 3 bases per codon, and you get 100 codons. If you assume that each codon codes for an amino acid, then the answer is 100 amino acids.