I) Explain how the biochemical reaction can still occur if the blood sugar level is lower than the normal range.
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To produce energy from available sugar.

Explanation:

The biochemical reaction can still occur if the blood sugar level is lower  than the normal range because energy is needed by the body for its activities. The biochemical reactions helps in producing energy in the form of ATP that is needed by the body for its different activities. The lower level of sugar in the blood does not fulfil the needs of body but provides some energy for it so that's why the body produces energy from available sugar present in the body.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.