Top answers

How do I test for the presence of starch in food?

The iodine test - use a dropper to apply a little iodine onto a small sample of the food. If starch is present, the iodine will change colour from orange/brown to blue/black.
AP
Answered by Anastasia P. • Biology tutor
11109 Views

What is the best way to prepare for a Cambridge interview?

Cambridge interviews are nowhere near as scary (or weird!) as they are often reputed to be. Mostly, tutors are looking to see that you actually care about the subject in addition to being good at it. I found...
AP
1976 Views

Why do I need to do a risk assessment?

The risk assessment lets the examiners know how much thought you have put into both the planning and the execution of your project. While the risk assessment doesn't go into the main body of your project, it...
AP
4675 Views

How do I know which is the object and which is the subject of a sentence?

Basically nouns can be the object or subject of a sentence (as well as other things but we can ignore those for now). The easiest way to decide whether a noun is the subject or the object is to decide what r...
GM
Answered by George M. • German tutor
3598 Views

Describe the events that occur leading to an action potential, and briefly explain why it is described as "all or nothing"?

Across the membrane of a neuron, the membrane potential at rest is approximately -70mV. When a stimulus of some kind is detected by sensory receptors (for example the nociceptors on the skin surface which de...
BA
Answered by Bilaal A. • Biology tutor
4467 Views