LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ATGCCT
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UACGGA
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AUGCCU
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TACGGA
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Detailed explanation-1: -Except for uracil which replaces thymine in mRNA. A (Adenine) pairs with U (Uracil) instead of Thymine (T) and C (Cytosine) pairs with G (Guanine). Thus, the complementary RNA sequence will be: UAAGCUAC.
Detailed explanation-2: -DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using ‘T’ as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3’ T C G T T C A G T 5’, the mRNA sequence would be 5’ A G C A A G U C A 3’.
Detailed explanation-3: -During transcription, DNA is converted to messenger RNA (mRNA) by an enzyme called RNA polymerase. RNA is a molecule that is chemically similar to DNA, and also contains repeating nucleotide subunits. However, the “bases” of RNA differ from those of DNA in that thymine (T) is replaced by uracil (U) in RNA.