9th Class Biology Notes Chapter 7 Long Questions PDF - Enzymes

Descriptive questions for Unit 7, Enzymes, of the new 9th class Biology course. Descriptive answers for the whole unit, arranged topic by topic, with the textbook figures kept in.

• Class: 9th (Matric Part 1)
• Subject: Biology, English Medium
• Unit 7: Enzymes
• Question type: Descriptive, long answer questions
• Answer style: definition, explanation, applications and examples under clear sub-headings
• Syllabus: New PECTAA syllabus for Punjab Boards, sessions 2025-26 and 2026-27
• Format: PDF, with the textbook figures kept in

Ground covered by these descriptive answers:

• Metabolism defined, and catabolism set against anabolism with examples of each
• How enzymes work, and the lock and key model of enzyme action
• Enzyme specificity and the shape of the active site
• Factors affecting enzyme activity: temperature, pH, substrate concentration
• Enzyme inhibition, both competitive and non-competitive, with real examples

Get the PDF from taleem360.com and use it alongside your textbook while you prepare this unit.