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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Type of amino acids in the cell of the organism
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sequence of subunits A, T, C, and G in the DNA of the organism
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size of single sugar molecules in the organs of the organism
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shape of the protein molecules in the organelles of the organism
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Detailed explanation-1: -The kind of genes an organism possesses is determined by the order of the nucleotide bases in the organism’s DNA. DNA has four different bases: adenine, thymine, guanine and cytosine. Adenine pairs with thymine and guanine pairs with cytosine to form the rungs of the DNA ladder.
Detailed explanation-2: -Gene location by sequence inspection. Sequence inspection can be used to locate genes because genes are not random series of nucleotides but instead have distinctive features. These features determine whether a sequence is a gene or not, and so by definition are not possessed by non-coding DNA.
Detailed explanation-3: -Each strand of DNA is formed of four basic building blocks or ‘bases’: adenine (A), cytosine (C), guanine (G) and thymine (T). The order, or sequence, of these bases determines our unique genetic code and contains the instructions for producing molecules in our bodies.
Detailed explanation-4: -In the 1950s, a biochemist named Erwin Chargaff discovered that the amounts of the nitrogenous bases (A, T, C, and G) were not found in equal quantities. However, the amount of A always equalled the amount of T, and the amount of C always equalled the amount of G.