Biology 5090/22 — May/June 2023
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
Topics Human Nutrition · Disease and Immunity · Enzymes · Inheritance · Plant Nutrition · Human Gas Exchange · +7 more
Table 1.1 lists three of the gases present in the atmosphere.
Table 1.1
| gas | percentage |
|---|---|
| oxygen | |
| carbon dioxide | |
| nitrogen |
Complete Table 1.1 to state the percentage of each gas in the atmosphere.
Some foods are packaged in a sealed container that contains a mixture of the same gases, with percentages that are different from those found in atmospheric air.
Fig. 1.1 shows a diagram of food packaged in this way.
This method of food packaging slows down decomposition of the food.
Suggest how the percentage of one gas named in Table 1.1 is changed when used to package food in this way.
______
Explain how this change will slow down decomposition of the food.
Suggest two advantages of slowing down decomposition of packaged food.
- ______
- ______
The rest of this paper
6 more questions- Q2Human Nutrition · Disease and Immunity10M
- Q3Coordination and Control · Cell Structure and Organisation · Enzymes10M
- Q4Organisms and Their Environment · Inheritance16M
- Q5Transport in Flowering Plants · Coordination and Response in Plants · Plant Nutrition15M
- Q6Plant Nutrition10M
- Q7Inheritance · Biotechnology and Genetic Modification · Enzymes10M