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Describe 2 ways mutations can occur

• DNA not copied properly before cell division: mistakes in copying; small errors - gene/point mutations • Chromosomes damaged/break: usually repair; but may repair incorrectly - large changes in may gene...

Answered by Jake C. • Biology tutor

2887 Views

Advice on Biological Natural Sciences Personal Statements

General tipsIt’s important that you don’t do too much. Better to a few things well than spread yourself too thin so that you’re overly grilled in interview. My recommendation is pick mayb...

Answered by Jake C. • Personal Statements tutor

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John invests £8000 at compound interest rate of 1.5% per year. He wants to earn more than £2000 in interest. What is the LEAST time in WHOLE years that this will take?

Step 1) Create the formula: 8000 x 1.015ⁿStep 2) Equate to the target value: 8000 x 1.015ⁿ = ~~2000~~ 10000 (Common mistake is to use target of £2000 ...

Answered by Hamza H. • Maths tutor

3553 Views

0.0960g of Magnesium was reacted with 25cm^3 of HCL of 0.4mol/dm^3 concentration. Calculate the moles of each one and determine which one is in excess

Equations to usemoles = mass/Mrmoles= concentration*volumeAr of Magnesium = 12 Moles= 0.096/12 Moles=0.008Moles of HCL = 25/1000 x 0.4=0.1Therefore HCL is in excess

Answered by Tom G. • Chemistry tutor

4496 Views

How does ADH help control water loss in the body?

ADH (anti-diuretic hormone) is a hormone that is released by the brain. It is released if there is too much water loss via the kidneys, if this occurs, then the pituitary gland releases ADH into the blood...

Answered by Alvin C. • Biology tutor

9913 Views