LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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phosphate sugar
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ribose sugar
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nitrogenous bases
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hydrogen bonds
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Detailed explanation-1: -DNA molecules vary according to the presence of nitrogenous bases. The combination of purines and pyrimidines varies, but follows Chargaff’s rule. Examples for nitrogenous bases in DNA are: Adenine, Guanine, Thymine and Cytosine. Here, they pair according to complementary base pairing rule.
Detailed explanation-2: -Solution : Variable part of DNA molecule is nitrogen base, it may be A, G, T or C.
Detailed explanation-3: -Bases are the part of DNA that stores information and gives DNA the ability to encode phenotype, a person’s visible traits. Adenine and guanine are purine bases. These are structures composed of a 5-sided and 6-sided ring. Cytosine and thymine are pyrimidines which are structures composed of a single six-sided ring.
Detailed explanation-4: -The part of the nucleotide that stores genetic information is A. nitrogen base. There are five main bases namely adenine, guanine, cytosine, thymine, and uracil. The sequence of these bases in DNA or RNA determines the genetic information contained in the molecule.