1. The building blocks of nucleic acids are a) amino acids b) histones...
Building blocks of nucleic acids:
- Nucleotides are the building blocks of nucleic acids. They consist of three components: a sugar molecule (ribose in RNA and deoxyribose in DNA), a phosphate group, and a nitrogenous base.
Nucleic acids containing the triplet ACT:
- The nucleic acid that could contain the triplet of bases ACT is RNA, specifically messenger RNA (mRNA).
- mRNA is synthesized from DNA during transcription and carries the genetic information from the DNA in the nucleus to the ribosomes in the cytoplasm, where proteins are synthesized.
- The triplet ACT in mRNA would correspond to the sequence on the DNA template strand TGA, as mRNA contains complementary bases to the DNA template strand during transcription.
Explanation:
- DNA contains the bases adenine (A), cytosine (C), thymine (T), and guanine (G), while RNA contains adenine (A), cytosine (C), uracil (U), and guanine (G).
- During transcription, the DNA sequence is transcribed into a complementary mRNA sequence. In this process, thymine (T) in DNA is replaced by uracil (U) in mRNA.
- Therefore, the triplet ACT in mRNA would correspond to the DNA sequence TGU, where U represents uracil.
- This mRNA sequence would then be translated into a specific amino acid sequence during protein synthesis at the ribosomes.
In conclusion, the triplet ACT could be found in mRNA as a result of transcription from the DNA template strand, with uracil (U) replacing thymine (T) in the RNA sequence.