Search our library of A Level questions

Top answers

All subjects

A Level

Why does the haemoglobin dissociation curve shift to the right when an individual exercises.

The concentration of carbon dioxide in a persons bloodstream rises during exercise. The carbon dioxide molecules interact with substances in the bloodstream to form carbonic acid. This causes the blood to...

Answered by • Biology tutor

3581 Views

Describe the structure of an antibody and relate it to it's function.

An antibody is a Y shaped protein which has a constant region and a variable region. The variable region of an antibod...

Answered by Laila R. • Biology tutor

14660 Views

Give the IUPAC name of CH3CH2CH2CH2CH(OH)CN and describe why the formation of this molecule creates 2 enantiomers.

The IUPAC name of CH₃CH₂CH₂CH₂CH(OH)CN is 2-Hydroxyhexanenitrile as its carbon chain is 6 carbons long (Hex). The nitrile group takes naming priority over the a...

Answered by Owen R. • Chemistry tutor

19168 Views

What is a world city?

A city that has very significant economic or financial and/or political influence on an international scale. Key features:Major centre for finance, business, trade. Major centre for culture, media. Major ...

Answered by Rose J. • Geography tutor

2830 Views

How important was Ostpolitik to the reunification of Germany?

A good way to approach this question would be to break down the concepts involved. Ostpolitik can be broken down into its political, economic and social consequences, and a strong answer should differenti...

Answered by Katy B. • History tutor

2864 Views