Top answers

Name an appropriate reducing agent to convert ethanal to ethanol

NaBH4
LW
Answered by Louis W. • Chemistry tutor
4793 Views

What are two protein filaments that interact in the sarcomere to cause muscular contraction?

Actin and myosin filaments. Myosin heads bind to actin filaments, and the hydrolysis of ATP causes them to change shape and pull the actin filaments along horizontally.
LW
Answered by Louis W. • Biology tutor
3428 Views

Define the term "stem cell".

A stem cell is an undifferentiated cell, that has the potential to become a specialised cell.
TP
Answered by Tanisha P. • Biology tutor
3097 Views

Why are molecules coloured?

Generally, molecules are coloured as they absorb visible frequencies of light, to promote an electron to a higher energy level, so the other (complementary) frequencies of light pass through the sample and a...
CB
Answered by Callum B. • Chemistry tutor
5027 Views

How can I revise for the A Level Spanish oral exam?

Make lists of useful vocabulary for the main topics covered throughout the course, as these will come in handy during the exam. Try and go over these and test yourself in the days before the exam. A practica...
GH
Answered by Georgina H. • Spanish tutor
11566 Views