3.- During RNA synthesis, the TAGC DNA template will be transcribed to produce w

Question

3.- During RNA synthesis, the TAGC DNA template will be transcribed to produce which of the following sequences: a) ATCG b) GCTA c) CGTA d) AUCG e) GCUA
4.- The base sequence of codon 57- 58 of the reductase gene in cytochrome B5 CAGCGC. The mRNA produced during transcription of this gene will contain the sequence: a) GCGCTG b) CUGCGC c) GCGCUG d) CAGCGC e) GUCGCG
5.- In the nuclear DNA of the human genetic code, one of the codons that specilizes for the amino acid tirocin is UAC. Another codon that specifies amino acid is a) AAC b) UAG C) UCC d) AUG e) UAU 3.- During RNA synthesis, the TAGC DNA template will be transcribed to produce which of the following sequences: a) ATCG b) GCTA c) CGTA d) AUCG e) GCUA
4.- The base sequence of codon 57- 58 of the reductase gene in cytochrome B5 CAGCGC. The mRNA produced during transcription of this gene will contain the sequence: a) GCGCTG b) CUGCGC c) GCGCUG d) CAGCGC e) GUCGCG
5.- In the nuclear DNA of the human genetic code, one of the codons that specilizes for the amino acid tirocin is UAC. Another codon that specifies amino acid is a) AAC b) UAG C) UCC d) AUG e) UAU a) ATCG b) GCTA c) CGTA d) AUCG e) GCUA
4.- The base sequence of codon 57- 58 of the reductase gene in cytochrome B5 CAGCGC. The mRNA produced during transcription of this gene will contain the sequence: a) GCGCTG b) CUGCGC c) GCGCUG d) CAGCGC e) GUCGCG
5.- In the nuclear DNA of the human genetic code, one of the codons that specilizes for the amino acid tirocin is UAC. Another codon that specifies amino acid is a) AAC b) UAG C) UCC d) AUG e) UAU
4.- The base sequence of codon 57- 58 of the reductase gene in cytochrome B5 CAGCGC. The mRNA produced during transcription of this gene will contain the sequence: a) GCGCTG b) CUGCGC c) GCGCUG d) CAGCGC e) GUCGCG
5.- In the nuclear DNA of the human genetic code, one of the codons that specilizes for the amino acid tirocin is UAC. Another codon that specifies amino acid is a) AAC b) UAG C) UCC d) AUG e) UAU

Explanation / Answer

3. d. AUCG

The sequence in DNA is TAGC (thymine, adenine, guanine and cytosine). The base A is complementary to T, C is complementary to G and vice versa. These bases are in DNA iand s transcribed to RNA. So the complementary bases in RNA will be A-U and C-G. So for TAGC, the complementary sequence is AUCG.

4. e. GUCGCG

5. e. UAU - tyrosine

An aminoacid is represented by a triplet (3 bases) code known as codon. One codon represents only one amino acid. UAU represents only tyrosine, not any other amino acid. But one amino acid may have more than one codons. Example: Tyrosine can be represented by UAU, UAC. Stop codons can be UAG, UGA , UAA. There are total 64 codons and 20 amino acids.

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