Top answers

Explain the light-dependent reaction of photosynthesis

The light-dependent reaction along with the Calvin cycle (light-independent) make up the process of photosynthesis in organisms such as plants, algae and cyanobacteria. In the light-dependent reaction light ...
SL
Answered by Spyros L. • Biology tutor
6068 Views

a) Explain how an action potential is passed across a synapse b) Label the graph below with the steps of action potential generation c) The graph shows the results of a study on two groups taking different medication, is the difference significant?

a) When an action potential arrives at the presynaptic membrane there is an influx of calcium ions which allows the vesicles containing neurotransmitter to move to and fuse with the presynaptic membrane. The...
CK
Answered by Catrina K. • Biology tutor
3841 Views

In a circuit with a 12V battery, 20Ω resistor and 10Ω resistor, all in series, calculate the current that would flow?

This question can be split into two parts, the first is calculating overall resistance: in series the R total = R 1 + R 2 so here R total = 10Ω + 20Ω = 30Ω The second is to choose the relevant equation, pote...
LA
Answered by Lauren A. • Biology tutor
5554 Views

Identify the differences between motor and sensory neurons in terms of features and function.

Motor neurons have a cell body, short dendrites and a long axon. Their function is to conduct impulses to an effector (muscle or gland).Sensory neurons, on the other hand, have a cell body, long dendrites an...
MM
Answered by Michelle M. • Biology tutor
30113 Views

Humans need to remove (excrete) waste products from the bloodstream. Describe the processes that produce waste products and how the products are removed from the body. (6 marks)

Urea is produced via the breakdown of amino acids in the liver, which is removed from the blood by the kidneys and excreted in urine . Carbon dioxide is a waste product of respiration in cells and is breathe...
KJ
Answered by Kizzy J. • Biology tutor
23292 Views