Biology 5090/21 — May/June 2017
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
Topics Transport in Humans · Cell Structure and Organisation · Plant Nutrition · Human Nutrition · Transport in Flowering Plants · Cell Division and Reproduction · +7 more
Spirulina is classified in the group bacteria. Spirulina is green in colour and is able to synthesise its own food.
List three characteristics of bacteria.
- ______
- ______
- ______
Suggest the name of the chemical that gives Spirulina its green colour.
______
Write, in words or symbols, the equation for the process by which Spirulina synthesises its own food.
______ ______
Spirulina can be eaten by humans.
The United Nations World Health Organization (WHO) made the following statement about Spirulina:
‘For WHO Spirulina represents an interesting food for multiple reasons. Rich in iron and protein, it can be given to children without any risk. We at WHO consider it to be a very suitable food.’
Use your knowledge of animal nutrition to suggest and explain why WHO considers Spirulina to be a ‘very suitable food’.
The rest of this paper
8 more questions- Q2Transport in Flowering Plants · Plant Nutrition11M
- Q3Transport in Humans · Human Nutrition · Coordination and Control · Sexual Reproduction in Humans11M
- Q4Cell Division and Reproduction · Inheritance12M
- Q5Cell Division and Reproduction6M
- Q6Human Gas Exchange · Transport in Humans10M
- Q7Inheritance10M
- Q8Cell Structure and Organisation · Transport in Flowering Plants · Transport in Humans10M
- Q9Respiration · Movement Into and Out of Cells10M