Top answers

How do I solve simultaneous equations by substitution?

Often, substitution is used when dealing with quadratic simultaneous equations as the other method, elimination, is more straightforward and can be used to solve linear equations but it cannot be used for qu...
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Answered by Niamh M. • Maths tutor
6278 Views

What is the difference between mitosis and meiosis?

Both are processes of cell division in which one cell splits. In mitosis two genetically identical daughter cells are produced. In mitosis the 46 chromosomes within a cell (human) are duplicated, then one co...
MK
Answered by Milan K. • Biology tutor
3368 Views

How is a particle moving in circular motion accelerating but not varying speed?

When a particle moves in circular motion, the resultant centripetal force acts radially towards the centre of the circle. Since there is a force there must be an acceleration on the particle due to Newtons 2...
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Answered by Max S. • Physics tutor
4695 Views

Outline the function of DNA Ligase

Imagine DNA Ligase to be like glue. It brings all the molecules of the newly formed DNA or RNA strands together and permanently binds them with a phosphodiester bond, so that they dont just fall apart. It is...
JC
Answered by Julia C. • Biology tutor
8892 Views

Do I need to remember researcher names and dates?

No. As long as you can outline the study and it’s findings, the examiner will know what you’re talking about. Of course you’re expected to know about Zimbardo and Milgram for example but that will come with ...
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Answered by Daniel T. • Psychology tutor
11317 Views