Dinosaurs became common on land
Ans.
The codons show genetic codes, made up of triplet of nucleotides in DNA or RNA that code for specific amino acids. The different codes can code for a same a amino acid. When a substitutional mutation occurs in genetic material, it shows substitution of one nucleotide pair for another and leads to formation of a different codon.
The first mutation that leads to CAU to CAC, it will not show any potential damage as both CAU and CAC codons code for histidine amino acid.
The second mutation that leads to UGU to UGC will also not show any damage to protein as both of these codons code for cysteine amino acid.
The third codon, that results UCU to UUU will cause a potential damage to protein as UUU codes for phenyl alanine (an aromatic, non-polar amino acid) and UCU codes for serine (a polar amino acid).
Thus, the correct answer is 'option C).' as in a protein, substitution of serine with phenylalanine will lead to change in structure and function of that protein.
Arachadonic acid is a carboxylic acid with a 20 carbon chain and four cis-double bonds. They do not have any functional groups. It is a polyunsaturated fatty acid present in the phospholipids of the membranes in the cells of the body, brain, muscle and liver. Prostaglandins are the active lipids compounds abundant in human tissue. They are a 20 carbon chain saturated fatty acids with a 5 carbon ring forming a cyclopentane. It has one trans-double bond, two hydroxyl functional groups and a ketone functional group.
