The amino acids coded triplets in the 3' to 5' strand on the normalp53 gene of chromosome 13 are lysine, leucine, Glutamine, stop codons.
Explanation:
mRNA is formed by the transcription of DNA strand coding for a gene.
Any mutation in the DNA sequence even a difference of base pair would cause formation of different amino acids and hence altered protein.
The amino acid is formed in the step of translation where codes are read by tRNA on the mRNA strand and correct nucleotide is brought to growing polypeptide chain.
In transcription 3' to 5' strand acts a template strand. The amino acids on the p53 gene of chromosome 17 is
3'TTT AAC GTC ATC 5' Gene sequence
5' AAA UUG CAG UAG 3' mRNA
lysine, leucine, Glutamine, stop
B. The water is likely contaminated with high levels of pollution or waste
Structurally, DNA and RNA are nearly identical. As mentioned earlier, however, there are three fundamental differences that account for the very different functions of the two molecules. RNA has a ribose sugar instead of a deoxyribose sugar like DNA. RNA nucleotides have a uracil base instead of thymine.
Answer:
d.They prevent the two parental strands from coming together again.
Explanation:
During the process of DNA replication, the two DNA strands should be separated from each other to serve as a template. To separate the two DNA strands, the helicase enzyme breaks down the hydrogen bonds between the complementary base pairs of the DNA strands. The process uses ATP as a source of energy.
Due to the presence of complementary base pairs, the separated DNA strands have a tendency to reanneal by the formation of hydrogen bonds. To prevent the reannealing of separated DNA strands, single stranded binding proteins bind to them. Binding to single stranded binding proteins to the separated DNA strands does not allow them to reanneal.
