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A plant is moving mineral ions from the soil into its roots by the process of active transport. Does this suggest that the concentration of ions is higher in the soil or the roots?

The concentration is higher in the soil. The process of active transport is used to move molecules against the concentration gradient (from a low to a high concentration). Therefore the concentration of ions...
AM
Answered by Alice M. • Biology tutor
10820 Views

Explain the Polymerase Chain Reaction (PCR) as a technique to make copies of DNA.

PCR takes place in three stages - denaturation, annealing, and extension. The process begins with a very small quantity of DNA being loaded into a PCR machine. The hydrogen bonds that exist between the two s...
AB
Answered by Aashna B. • Biology tutor
4264 Views

What happens at the junction between neurons?

Neurons are the basic cells in the nervous system. They are made up of a soma, axon, dendrites and synapse. The synapse is the end part of the neuron that is in charge of sending a message from one neuron to...
SD
Answered by Sean D. • Biology tutor
4092 Views

Explain the process of oxidative phosphorylation

Oxidative phosphorylation is the process by which energy in the form of ATP is produced when there is oxygen present in the cells. It occurs in the membrane of the mitochondria. Reduced NAD which is produced...
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Answered by Abaan B. • Biology tutor
6306 Views

Explain how the liver aids digestion in the alimentary canal

The liver produces bile.Bile is an alkaline solution that neutralises stomach acid. The HCl in the stomach produces acidic conditions. These acidic conditions are not suitable for the rest of the alimentary ...
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Answered by Oliver E. • Biology tutor
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