Question

3 'AAA TCG GCG AT A5 ‘ is the sequence of nucleotides on a gene after transcription,the mRNA formed by it and the sequence of bases in the corresponding binding anticodon will be
A)5 ‘UUU ACG CGC U AU3’ AAA-UGC’- GCG -AUA5 ‘
B)5 ‘U AU CGC GC A UUU3 ‘ and AU A - GCG-CGU-AAA5 ‘
C)5 ‘UUU ACC TUG U AU3 ‘and 3 ‘AAA-UGG-UAC-AU A5 ‘
D)5 ‘AU GUT CC A UUU3 ‘and 3 ‘AU A-CAU-CGU-AAA5 ‘

Answer 1

Hint: A gene is a sequence of nucleotides along a DNA strand that determines a sequence of amino acids that are connected together to form a protein - with 'start and stop' codons and other regulatory elements.

Complete answer:
A)3′-AAA TGC GCG ATA-5′ Non-coding strand
B)5'-TTT AGC CGC TAT-3' Coding strand
C)5'-UUU ACG CGC UAU-3' mRNA with codons
D)3'-AAA UGC CGC AUA-5' tRNA with anticodons

The template strand (non-coding or antisense) is the sequence of the gene nucleotides used to create the mRNA. The strand of the prototype is read in the direction of 3'-5'. The coding strand is read in the direction of 5'-3 '. The synthesised mRNA is identical to the coding strand, with uracil replacing only the thymine. The mRNA contains codons, and there will be anticodons in the tRNA, and there will be opposite directions.

We recognise that they are complementary to codons and anticodons. Base pairs of adenine with uracil in RNA and thymine in DNA. It pairs guanine and cytosine with each other. There are complementary base pairs. Adenine and guanine are purines from these (2 carbon-nitrogen rings) and pyrimidines nine are thymine and cytosine (1 carbon-nitrogen ring).

Hence, the correct answer is option (A)

Note: In a messenger RNA (mRNA) sequence, an anticodon is a trinucleotide sequence complementary to that of a corresponding codon. At one end of a transfer RNA (tRNA) molecule, an anticodon is found.