Ruth W.

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Biochemistry (Masters) - Birmingham University

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Daisy (Student)

December 17 2016

Daisy (Parent from Littlehampton)

December 17 2016

Daisy (Student)

December 17 2016

Daisy (Parent from Littlehampton)

December 14 2016

#### Qualifications

MathematicsA-level (A2)A
BiologyA-level (A2)A
ChemistryA-level (A2)A

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### Make X the subject of the equation (9x-7)/3 = 8y

To start solving a question like this you want to do it in a set of steps:

Step 1: Get rid of the division.  To do thsi you need to do the opposite function.  The opposite of division is multiplication so you multiply both sides by what you've divided by (in this case 3).  So the equation would now read: 9x-7 = 24y

Step 2: Get 9X on it's own on   To do this you need to get rid of the -7.  The opposite function of subtraction is addition so you +7 to both sides.  So the equation would now read: 9x = 24y+7

Step 3: Get X on it's own.  9x means 9 multiplied by X so you use the opposite function again, In this case you would divde both sides by 9 to get x on it's own.  The equation would now read x = (24y+7)/9

To start solving a question like this you want to do it in a set of steps:

Step 1: Get rid of the division.  To do thsi you need to do the opposite function.  The opposite of division is multiplication so you multiply both sides by what you've divided by (in this case 3).  So the equation would now read: 9x-7 = 24y

Step 2: Get 9X on it's own on   To do this you need to get rid of the -7.  The opposite function of subtraction is addition so you +7 to both sides.  So the equation would now read: 9x = 24y+7

Step 3: Get X on it's own.  9x means 9 multiplied by X so you use the opposite function again, In this case you would divde both sides by 9 to get x on it's own.  The equation would now read x = (24y+7)/9

1 year ago

614 views

### What are atoms?

Atoms are small particles that make up everything.  If you picture an object made up from mini-footballs then that's what the atoms look like that make up the object just on a much, much smaller scale.

Atoms have protons (positive charges) , Electrons (negative charges) and Neutrons (neutral charges) in them.  It depends on the atom as to how many of each you have. Standard atoms make up the periodic table and are called elements.  Elements are atoms in their most basic form and it's from these elements that everything is made-up from.

Atoms are small particles that make up everything.  If you picture an object made up from mini-footballs then that's what the atoms look like that make up the object just on a much, much smaller scale.

Atoms have protons (positive charges) , Electrons (negative charges) and Neutrons (neutral charges) in them.  It depends on the atom as to how many of each you have. Standard atoms make up the periodic table and are called elements.  Elements are atoms in their most basic form and it's from these elements that everything is made-up from.

1 year ago

710 views

### What is genetic dominance?

Genes are sections of our DNA that have a specific genetic code.  When you're born you get a copy of each gene from your mother and a copy of each gene from your father.  These copies are called alleles.  For each gene you get 2 copies of each allele and these can be dominant, receissive or co-dominant.

If you have 2 dominant alleles e.g. RR (red colour in plant), then the plant would be red.

If you have 2 recessive alleles e.g. rr (white colour) then the plant would be white.

If you have 1 dominant and 1 recessive  e.g. Rr then the plant would be red as the dominant allele is always shown.

Incomplete dominance  is where neither allele is dominant e.g. R = red, W = white.  Both alleles are expressed and contribute equally to the phenotype (or colour).  So RR = red, WW = white and RW = pink.

Co-dominance is where both alleles are dominant e.g. Blood Type AB

Genes are sections of our DNA that have a specific genetic code.  When you're born you get a copy of each gene from your mother and a copy of each gene from your father.  These copies are called alleles.  For each gene you get 2 copies of each allele and these can be dominant, receissive or co-dominant.

If you have 2 dominant alleles e.g. RR (red colour in plant), then the plant would be red.

If you have 2 recessive alleles e.g. rr (white colour) then the plant would be white.

If you have 1 dominant and 1 recessive  e.g. Rr then the plant would be red as the dominant allele is always shown.

Incomplete dominance  is where neither allele is dominant e.g. R = red, W = white.  Both alleles are expressed and contribute equally to the phenotype (or colour).  So RR = red, WW = white and RW = pink.

Co-dominance is where both alleles are dominant e.g. Blood Type AB

1 year ago

562 views