Search our library of homework questions

Top answers

All subjects

All levels

Expand and simplify 5(x+4)-3(2+3x)

5(x+4)-3(2+3x)

Expand first bracket

5x+20-3(2+3x)

Expand second bracket

5x+20-6-9x

simplify

14-4x

Answered by Jacob F. • Maths tutor

4955 Views

Messenger RNA (mRNA) is used during translation to form polypeptides. Describe how mRNA is produced in the nucleus of the cell. (6 marks)

This process is called transcription. In the nucleus, an enzyme helicase is used to break the hydrogen bonds between the two strands of the double helix. Only o...

Answered by Kirstin P. • Biology tutor

3501 Views

How do you best succeed at the essay element of the exam?

The key elements to doing well on the essay part:

know the book / movie well and know what happens in each scene
know the key vocab including techincal terms

Answered by Caroline R. • German tutor

1834 Views

During anaerobic respiration, pyruvate is converted to lactate by the enzyme lactate dehydrogenase. Explain the significance of this reaction.

This reaction involves a transfer of hydrogen from NADH to pyruvate to produce lactate and NAD⁺. In order for glycolysis to continue to produce ATP for the cell to use, NAD⁺ is requi...

Answered by Thomas S. • Biology tutor

12575 Views

Explain the trend in boiling points between HF, HCl and HBr.

There are two themes in this answer. The first being the hydrogen bonding potential of HF and the second being the difference in size of the of the halide ions. Fluorine is one of three elements that can ...

Answered by Thomas S. • Chemistry tutor

50351 Views