Read the passage given below and answer the following questions:The sequence of bases in m-RNA are read in a serial order in groups of three at a time. Each triplet of nucleotides (having a specific sequence of bases) is known as codon. Each codon specifies one amino acid. Many amino acids have more than one codons. The amino acids are brought to the mRNA by another type of RNA and called tRNA. Each amino acid has atleast one corresponding tRNA. At one end of the tRNA molecule is a trinucleotide base sequence that is complementary to some trinucleotide base sequence on mRNA.Q. Which of the following nitrogen bases is not present in RNA?a)Thymineb)Adeninec)Guanined)CytosineCorrect answer is option 'A'. Can you explain this answer?

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The sequence of bases in m-RNA are read in a serial order in groups of three at a time. Each triplet of nucleotides (having a specific sequence of bases) is known as codon. Each codon specifies one amino acid. Many amino acids have more than one codons. The amino acids are brought to the mRNA by another type of RNA and called tRNA. Each amino acid has atleast one corresponding tRNA. At one end of the tRNA molecule is a trinucleotide base sequence that is complementary to some trinucleotide base sequence on mRNA.

Q. Which of the following nitrogen bases is not present in RNA?

a)
Thymine
b)
Adenine
c)
Guanine
d)
Cytosine

Correct answer is option 'A'. Can you explain this answer?

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In RNA, thymine is not present. In place of thymine, uracil is present in RNA.

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Thymine is not present in RNA

Thymine is a nitrogen base that is found in DNA but not in RNA. RNA contains adenine, guanine, cytosine, and uracil as its nitrogenous bases. Thymine is replaced by uracil in RNA during transcription. This substitution of thymine with uracil is one of the key differences between DNA and RNA.

Explanation:
- RNA contains four nitrogen bases: adenine (A), guanine (G), cytosine (C), and uracil (U).
- Thymine (T) is a nitrogen base found in DNA but is not present in RNA.
- During transcription, DNA is used as a template to synthesize RNA. Thymine in DNA is replaced by uracil in RNA.
- The presence of thymine in DNA and its absence in RNA is a fundamental difference between the two types of nucleic acids.
- Therefore, thymine is not present in RNA, making option 'A' the correct answer to the question.

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Read the passage given below and answer the following questions:The sequence of bases in m-RNA are read in a serial order in groups of three at a time. Each triplet of nucleotides (having a specific sequence of bases) is known as codon. Each codon specifies one amino acid. Many amino acids have more than one codons. The amino acids are brought to the mRNA by another type of RNA and called tRNA. Each amino acid has atleast one corresponding tRNA. At one end of the tRNA molecule is a trinucleotide base sequence that is complementary to some trinucleotide base sequence on mRNA.Q. Which of the following nitrogen bases is not present in RNA?a)Thymineb)Adeninec)Guanined)CytosineCorrect answer is option 'A'. Can you explain this answer?

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Read the passage given below and answer the following questions:The sequence of bases in m-RNA are read in a serial order in groups of three at a time. Each triplet of nucleotides (having a specific sequence of bases) is known as codon. Each codon specifies one amino acid. Many amino acids have more than one codons. The amino acids are brought to the mRNA by another type of RNA and called tRNA. Each amino acid has atleast one corresponding tRNA. At one end of the tRNA molecule is a trinucleotide base sequence that is complementary to some trinucleotide base sequence on mRNA.Q. Which of the following nitrogen bases is not present in RNA?a)Thymineb)Adeninec)Guanined)CytosineCorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Read the passage given below and answer the following questions:The sequence of bases in m-RNA are read in a serial order in groups of three at a time. Each triplet of nucleotides (having a specific sequence of bases) is known as codon. Each codon specifies one amino acid. Many amino acids have more than one codons. The amino acids are brought to the mRNA by another type of RNA and called tRNA. Each amino acid has atleast one corresponding tRNA. At one end of the tRNA molecule is a trinucleotide base sequence that is complementary to some trinucleotide base sequence on mRNA.Q. Which of the following nitrogen bases is not present in RNA?a)Thymineb)Adeninec)Guanined)CytosineCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the passage given below and answer the following questions:The sequence of bases in m-RNA are read in a serial order in groups of three at a time. Each triplet of nucleotides (having a specific sequence of bases) is known as codon. Each codon specifies one amino acid. Many amino acids have more than one codons. The amino acids are brought to the mRNA by another type of RNA and called tRNA. Each amino acid has atleast one corresponding tRNA. At one end of the tRNA molecule is a trinucleotide base sequence that is complementary to some trinucleotide base sequence on mRNA.Q. Which of the following nitrogen bases is not present in RNA?a)Thymineb)Adeninec)Guanined)CytosineCorrect answer is option 'A'. Can you explain this answer?.

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