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Describe how proteins are processed and released from cells

Proteins travel to the Golgi Apparatus where they are modified (e.g. glycosylation) and packaged into vesicles. Vesicles then travel to, and fuse with, the cell surface membrane. This causes the release o...

Answered by Shahmeer H. • Biology tutor

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As the volume of blood in the ventricles of the heart increases, with all other factors constant, stroke volume increases till a point. Explain why. (5)

Define stroke volume as the volume of blood expelled by the left ventricle into the aorta per contraction of the heart.Idea that as blood volume in the ventricle increases, this stretches the sarcomeres o...

Answered by Azmaeen Z. • Biology tutor

1952 Views

How can natural selection create two different species from one species?

For speciation to occur, two populations of a species must become reproductively isolated. This can result from either the formation of a geographic barrier between two populations of the species, prevent...

Answered by Sean K. • Biology tutor

2088 Views

Guard cells open and close stoma in different conditions. When light intensity is high, potassium ions move into guard cells. Describe how this movement of potassium ions causes the stoma to open.

When the potassium ions move into the guard cells they increase the concentration. This causes water to move into the guard cells from more dilute areas by osmosis. The additional water leads to the guard...

Answered by Emily W. • Biology tutor

27135 Views

The genetic code is described as degenerate, universal and overlapping. Explain these terms.

The genetic code is universal because all species use the same four bases A,T,C and G, and each base sequence codes for the same amino acid in all species. despite the 64 possible codons (sequence of thre...

Answered by Emily W. • Biology tutor

36703 Views