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1. The building blocks of nucleic acids are
a) amino acids
b) histones
c) nucleosides
d) nucleotides
22. Which of the following nucleic acids, could contain the triplet of bases ACT?
a) DNA •
b) mRNA
c) rRNA
d) tRNA?
Most Upvoted Answer
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.
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1. The building blocks of nucleic acids are a) amino acids b) histones c) nucleosides d) nucleotides 22. Which of the following nucleic acids, could contain the triplet of bases ACT? a) DNA • b) mRNA c) rRNA d) tRNA?
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1. The building blocks of nucleic acids are a) amino acids b) histones c) nucleosides d) nucleotides 22. Which of the following nucleic acids, could contain the triplet of bases ACT? a) DNA • b) mRNA c) rRNA d) tRNA? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about 1. The building blocks of nucleic acids are a) amino acids b) histones c) nucleosides d) nucleotides 22. Which of the following nucleic acids, could contain the triplet of bases ACT? a) DNA • b) mRNA c) rRNA d) tRNA? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 1. The building blocks of nucleic acids are a) amino acids b) histones c) nucleosides d) nucleotides 22. Which of the following nucleic acids, could contain the triplet of bases ACT? a) DNA • b) mRNA c) rRNA d) tRNA?.
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