Langur monkeys and ruminants (such as cows)are the only known mammals in which lysozyme functions in the stomach instead of in tears and saliva.The cow/langur enzyme also has five amino acid changes that are not present in other mammals.What is most likely to be true about lysozyme from langurs and cows compared to lysozyme from other mammals? A)Salivary and tear lysozyme functions best at a higher H⁺ ion concentration than the cow/langur enzyme. B)The five amino acids that langurs and cows have in common in their lysozyme were present in the common ancestor of all mammals. C)These five amino acid changes alter the specificity of the enzyme,such that the cow/langur lysozyme attacks viruses instead of bacteria. D)These five amino acid changes somehow make the cow/langur lysozyme resistant to pepsin digestion.

Question

Quizplus · Accepted Answer

The five amino acid changes in the cow/langur lysozyme likely make it resistant to pepsin digestion, enabling it to function in the acidic and enzyme-rich environment of the stomach, unlike the lysozyme in other mammals that operates in less harsh environments like tears and saliva.

Langur Monkeys and Ruminants (Such as Cows)are the Only Known