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What is active transport and how is it used in the absorption of glucose?

Active transport is the movement of molecules or ions against their concentration gradient, using energy in the form of ATP , across a plasma membrane.In glucose absorption, there is an initially high concen...
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Answered by Nicola C. • Biology tutor
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Do you have any advice regarding nervousness during an exam?

Nervousness during exams is a problem for many students, especially when faced with the task of writing multiple full length essays under a time limit. However, it is definitely possible to evade those pesky...
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How does gel electrophoresis seperate DNA?

The DNA from PCR is placed into wells of agarose gel and a buffer solution is poured over it. An electrical current is passed through the gel due to the conduction of the buffer solution. The DNA fragments m...
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Answered by Holly D. • Biology tutor
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What happens when some alkali is added to a buffer solution?

The dissociation of the weak acid ‘HA’ would be shown as:HA (aq) ⇌ H + (aq) + A – (aq)Adding alkali will add OH - ions to the solution. These will react with the H + ions present in the solution, producing w...
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Answered by Holly D. • Chemistry tutor
15835 Views

When do I use the subjunctive?

1- What is the subjunctive? It is a mood (not a tense!) which expresses uncertain ideas. 2- So when do I use it? Set phrases with 'que' Negative phrases with 'que' which express emotion or doubt or other unc...
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Answered by Hannah P. • French tutor
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