Biology 5090/22 — October/November 2016
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
Topics Disease and Immunity · Human Nutrition · Transport in Humans · Plant Nutrition · Respiration · Coordination and Control · +8 more
Two separate strains, A and B, of the same species of microorganism are used in the making of bread and beer (a drink that contains alcohol).
Name this type of microorganism ______
Name the gas released by this microorganism during the production of bread and beer.
______
Fig. 1.1 shows the volume of gas released by the strains while they are being used.
Fig. 1.1 shows the gas released by strain B at a temperature of .
Draw a curve on Fig. 1.1 to show the effect on strain B of increasing the temperature by .
Name two other external factors that would change the shape of the curves shown in Fig. 1.1.
- ______
- ______
Strain A has a sweet taste and strain B has a bitter taste.
Suggest which strain is used for making bread. Give reasons for your answer.
strain used in making bread ______
reasons ______
The rest of this paper
8 more questions- Q2Sexual Reproduction in Plants · Plant Nutrition · Respiration · Disease and Immunity · Human Nutrition12M
- Q3Disease and Immunity · Sexual Reproduction in Humans10M
- Q4Transport in Humans9M
- Q5Organisms and Their Environment · Transport in Humans · Inheritance9M
- Q6Coordination and Control10M
- Q7Coordination and Control · Respiration · Transport in Humans · Human Gas Exchange10M
- Q8Movement Into and Out of Cells · Plant Nutrition · Human Nutrition10M
- Q9Disease and Immunity · Human Nutrition10M