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What is a radical and why is it important them?

The Chinese script is not an alphabet like in English; instead, it uses characters to represent whole words, often based on their meaning rather than their pronunciation. For example, the character 木 means '...
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Answered by Samuel A. • Mandarin tutor
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Define the term 'water potential' and describe the difference between isotonic, hypotonic and hypertonic solutions. Suggest the different effects on cells placed in the different solutions.

Water potential basically means how likely it is for water molecules to diffuse out of or into a solution.Pure water (i.e. water with no solutes) has a water potential value of 0.As you add solutes (i.e. sug...
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Answered by Elliot T. • Biology tutor
48750 Views

Two students are provided with a starting pistol, a stopwatch and a long measuring tape. The starting pistol produces a loud sound and a puff of smoke. Describe how the students use the apparatus to calculate the speed of sound.

The students stand at a distance of 200 m from each other (measured with the measuring tape). Student 1 fires the pistol, Student 2 starts the stopwatch when they see smoke from the pistol and stop it when t...
JM
Answered by Josh M. • Physics tutor
15553 Views

Describe the role of a ribosome in the production of a polypeptide

mRNA from the nucleus binds to a ribosome which is either free in the cytoplasm or associated with the rough ER. The ribosome binds at the 5' end and scans to the start codon (AUG). The ribosome allows tRNA ...
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Answered by Josh M. • Biology tutor
10054 Views

What are the key structural differences between a eukaryotic and prokaryotic cell?

Eukaryotic Cells - Eukaryotic cells are multicellular and more complex- Contain membrane bound organelles, so this includes a nucleus, which contains the genetic material as chromosomes, but other organelles...
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Answered by Adam A. • Biology tutor
6338 Views