Explain why reading the code in pairs of nucleotides is not sufficient
The DNA code is read in groups of three nucleotides called codons. Explain why reading the code in pairs of nucleotides is not sufficient. [K/3marks] 3. How does the fact that DNA Replicates semi conservatively decrease the possibility of errors made during DNA replication? [A/3marks] Unit 4 – Homeostasis I Define and give an example of homeostasis; negative feedback and positive feedback loops [K/3marks] 2.
Describe how the endocrine and the nervous systems interact to compensate for temporary fluctuations in the body’s internal environment (for example, in situations of stress) [A /3marks] 3. Why the Pituitary gland is known as the master gland of our body. Explain it with one example. [Comm/3 marks] Unit 5 – Population Dynamics 1. Give the conclusions of Malthus’s theory. [K/3 marks] 2. Explain factors as abiotic or biotic limiting factors and describe and identify carrying capacity [C/3marks] 3. Define population density. A/3 marks]
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