Exams › JEE Advanced › Chemistry

Which of the following enzyme-source pairs is INCORRECTLY matched? (A) Invertase — Yeast (B) Zymase — Malt (C) Urease — Soyabean (D) Pepsin — Stomach

1. Invertase (enzyme) -> yeast (source)
2. Zymase (enzyme) -> malt (source)
3. Urease (enzyme) -> soyabean (source)
4. Pepsin (enzyme) -> stomach (source)

Correct answer: Zymase (enzyme) -> malt (source)

Solution

Zymase is produced by yeast, not malt. Malt (germinated barley) contains diastase/amylase. The correct source of zymase is yeast, making option (B) the incorrect match.

Related JEE Advanced Chemistry questions

• How many phenylhydrazine molecules are required to react with one glucose molecule to form an osazone?
• What is the total number of asymmetric carbon atoms present in a 2-ketohexose molecule?
• Which of the following amino acids contains a secondary (2 degrees) amino group in its structure?
• D-Glucose (an aldohexose with structure CHO-(CHOH)4-CH2OH) is treated with NaBH4. How many optically active isomers of the product are possible?
• A decapeptide has a molecular weight of 796. On complete hydrolysis it yields glycine (molecular weight 75), alanine, and phenylalanine as the only products. If glycine contributes 47.0% of the total weight of all hydrolysis products, how many glycine units are present in the decapeptide?
• How many chiral centres are present in the structure of penicillin G (benzylpenicillin)?

⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →