Top answers

What is the difference between a saturated and unsaturated fatty acid?

Saturated fatty acids have no double bonds between the carbon atoms in their carbon chain (the carbon chain is ‘saturated’ with hydrogen). In contrast, unsaturated fatty acids have at least one double bond b...
Answered by • Biology tutor
32764 Views

Describe the nature of the genetic code

A base triplet (sequence of 3 bases) encodes a single amino acid. The same base triplet codes for the same amino acid in all organisms, meaning that the genetic code is universal. In addition the code is non...
IB
Answered by Isabel B. • Biology tutor
12536 Views

Find the equation of the tangent to the circle (x-3)^2 + (y-4)^2 = 13 that passes through the point (1,7)

Start with a sketch. We can see that the radius from the point (1,7) to the centre of the circle (3,4) is perpendicular to the tangent. The gradient of the radius is (4-7)/(3-1) = -3/2. We know that two perp...
Answered by • Maths tutor
3881 Views

How should I structure a main-body paragraph in a 25-mark essay question?

Although daunting facing a question a 25-mark question, following a template for structuring your paragraphs will help you feel more prepared and your argument will be clearer to the examiner reading it. Typ...
Answered by • Philosophy tutor
8655 Views

The formation of new species is known as speciation. Explain the difference between Allopatric and Sympatric speciation. [1 mark]

Both allopatric and sympatric speciation occurs due to reproductive isolation between populations of the same species. Allopatric speciation involves a physical barrier such as a river or mountain separating...
JD
Answered by Jonathan D. • Biology tutor
3372 Views