NURSING EXAM QUESTIONS
BIOCHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
purines & pyrimidines
|
|
|
protactids & peroxides
|
|
|
phosphotines and puradines
|
|
|
pantomimes & pastelines
|
Detailed explanation-1: -There are two main types of purine: Adenine and Guanine. Both of these occur in both DNA and RNA.
Detailed explanation-2: -Purines. Adenine and guanine are found in both DNA and RNA.
Detailed explanation-3: -Nitrogenous bases present in the DNA can be grouped into two categories: purines (Adenine (A) and Guanine (G)), and pyrimidine (Cytosine (C) and Thymine (T)). These nitrogenous bases are attached to C1’ of deoxyribose through a glycosidic bond. Deoxyribose attached to a nitrogenous base is called a nucleoside.
Detailed explanation-4: -Final answer: Purines found both in DNA and RNA are adenine and guanine.
Detailed explanation-5: -A nucleotide is the basic building block of nucleic acids (RNA and DNA). A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T).