PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Providing the instructions for the traits of an organism.
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Preventing mutations for occurring during DNA replication
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Allowing the DNA to have the shape necessary for replication.
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Helping from the sugar-phosphate backbone of DNA molecules
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Detailed explanation-1: -The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following? Providing the instructions for the traits of an organism.
Detailed explanation-2: -Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together. The binding of these base pairs forms the structure of DNA .
Detailed explanation-3: -The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C). The order, or sequence, of these bases determines what biological instructions are contained in a strand of DNA.
Detailed explanation-4: -It has to come from the nitrogen bases, because, as you already know, the backbone of all DNA molecules is the same. But there are only four bases found in DNA: G, A, C, and T. The sequence of these four bases can provide all the instructions needed to build any living organism.
Detailed explanation-5: -DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation.