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Tutor profile: Sonia R.

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Sonia R.
Researcher in Medical Imaging at The University of Edinburgh
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Questions

Subject: Basic Math

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Question:

Determine the exact value of sin 75.

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Sonia R.
Answer:

sin 75 = sin (45+30) =sin45cos30 + cos45sin30 exact values are useful here =(1/√2 x √3/2) + (1/√2 + 1/2) =√3+1/2√2

Subject: Chemistry

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Question:

Describe the basic structure of an atom.

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Sonia R.
Answer:

An atom is made up of a positively charged nucleus (containing protons and neutrons) with negatively charged electrons spinning in orbitals around the nucleus.

Subject: Biology

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Question:

Briefly describe the various stages of the cell cycle.

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Sonia R.
Answer:

A typical cell goes through multiple stages in its life cycle where each stage is designed to prepare the cell to undergo mitosis or meiosis. A brief overview of the cell cycle is as follows: Interphase = G1 (cell growth) followed by the S phase (DNA synthesis and replication) followed by another cell growth period in the G2 phase. As interphase finishes, the cell enters the mitotic period of of life cycle where mitosis and cytokinesis yield two identical daughter cells.

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