Mary Jones and Geoff Jones Solutions for Chapter: Biotechnology and Genetic Modification, Exercise 1: Exercise 20.1
Mary Jones Biology Solutions for Exercise - Mary Jones and Geoff Jones Solutions for Chapter: Biotechnology and Genetic Modification, Exercise 1: Exercise 20.1
Attempt the free practice questions on Chapter 20: Biotechnology and Genetic Modification, Exercise 1: Exercise 20.1 with hints and solutions to strengthen your understanding. Biology for Cambridge IGCSE Workbook 4 th Edition Digital Access solutions are prepared by Experienced Embibe Experts.
Questions from Mary Jones and Geoff Jones Solutions for Chapter: Biotechnology and Genetic Modification, Exercise 1: Exercise 20.1 with Hints & Solutions
Pectinase is an enzyme that is used in the manufacture of fruit juice. Pectinase is produced by microorganisms, such as fungus Penicillium viridicatum.
Pectinase is an enzyme. Explain what is meant by the term enzyme.
Pectinase is an enzyme that is used in the manufacture of fruit juice. Pectinase is produced by microorganisms, such as fungus Penicillium viridicatum.
Name the substrate of pectinase.
Explain why pectinase is used in food production.
Table 20.1 shows the production of pectinase by P. viridicatum when it is grown on different kinds of waste material from food processing. Bagasse is the waste material left over from processing sugar cane.
| Substrate | Production of pectinase/arbitrary units |
| Wheat bran | 1200 |
| Mango peel | 450 |
| Banana peel | 75 |
| Wheat bran + Sugarcane bagasse | 1500 |
| Mango peel + Sugarcane bagasse | 1500 |
| Banana peel + Sugarcane bagasse | 1000 |
Display these data on the grid in a way that clearly shows how adding sugar cane bagasse to the substrate affects the production of pectinase.
Suggest how using food processing waste materials as substrates for the production of pectinase could benefit the environment.
Penicillium viridicatum is grown in fermenters.
What is a fermenter?
List three conditions that are controlled in the fermenter while Penicillium viridicatum is growing in it. For each condition, explain why and how it is controlled.
