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If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256?
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If 4 types of nitrogen bases are present in nucleic acid,genetic code ...
Possible Number of Base Substitutions in Total Codon
Explanation:
The genetic code is made up of pentaplets or codons, each of which contains three nitrogenous bases. There are four types of nitrogen bases present in nucleic acid: adenine, guanine, cytosine, and thymine. Therefore, the total number of possible codons is 4^3 or 64.
However, some of these codons code for the same amino acid. For example, both UCU and AGU code for serine. Therefore, the number of different codons is actually only 61.
If a single base substitution occurs in a codon, it can lead to a different amino acid being coded for. There are three possible base substitutions that can occur in a codon: a transition (a purine base is replaced by another purine, or a pyrimidine base is replaced by another pyrimidine), a transversion (a purine base is replaced by a pyrimidine, or vice versa), or a silent mutation (a base substitution that does not change the amino acid that is coded for).
Therefore, the total number of possible base substitutions in a codon is:
3 x (3 + 12 + 36) = 3 x 51 = 153
Since there are 61 different codons, the total number of possible base substitutions in a codon is:
61 x 153 = 9312
Therefore, the possible number of base substitutions in a total codon is 9312.
Answer: (b) 960
Explanation:
The genetic code is made up of pentaplets or codons, each of which contains three nitrogenous bases. There are four types of nitrogen bases present in nucleic acid: adenine, guanine, cytosine, and thymine. Therefore, the total number of possible codons is 4^3 or 64.
However, some of these codons code for the same amino acid. For example, both UCU and AGU code for serine. Therefore, the number of different codons is actually only 61.
If a single base substitution occurs in a codon, it can lead to a different amino acid being coded for. There are three possible base substitutions that can occur in a codon: a transition (a purine base is replaced by another purine, or a pyrimidine base is replaced by another pyrimidine), a transversion (a purine base is replaced by a pyrimidine, or vice versa), or a silent mutation (a base substitution that does not change the amino acid that is coded for).
Therefore, the total number of possible base substitutions in a codon is:
3 x (3 + 12 + 36) = 3 x 51 = 153
Since there are 61 different codons, the total number of possible base substitutions in a codon is:
61 x 153 = 9312
Therefore, the possible number of base substitutions in a total codon is 9312.
Answer: (b) 960
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If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256?
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If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256?.
If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If 4 types of nitrogen bases are present in nucleic acid,genetic code pentaplets. what is possible number of base substitutions in total codon? (a)15360 (b)960 (c)1024 (d)256?.
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