12. Respiration
A section of Biology, 0610
Listing 10 of 234 questions
For Examiner's Use Complete the sentences about respiration by writing the most appropriate wordin each space. Respiration in living cells is a series of chemical reactions that release energy. These chemical reactions are speeded up by . If a yeast cell does not have enough oxygen it may carry out respiration. In this process and carbon dioxide are formed. This type of respiration in yeast is used by humans in In humans, when muscle cells do not have enough oxygen during exercise, is broken down into
0610_s13_qp_23
THEORY
2013
Paper 2, Variant 3
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