Top answers

Why is the resting membrane potential of a neurone negative when there are positive ions inside the cell?

The resting membrane potential inside the neurone (-70mV) is negative relative the outside! This means that even though there are both Na + and K + ions inside the cell, there are fewer of them (-70mV fewer)...
CS
Answered by Chloe S. • Biology tutor
5255 Views

By which two processes does glucose enter cells in the human body?

Active transport and diffusion. Glucose is transported by active transport, against the concentration gradient, from the gut into intestinal epithelial cells. Whereas glucose is transported by facilitated di...
RS
Answered by Robert S. • Biology tutor
18358 Views

Describe how a protein molecule is produced from mRNA

Translation is the conversion of the messenger RNA (mRNA) code into a protein. Cytoplasmic mRNA is bound by ribosomes (which are present in the cytoplasm or rough endoplasmic reticulum). Transfer RNA (tRNA) ...
JN
Answered by James N. • Biology tutor
5298 Views

What happens during an action potential?

Action potentials are how nerve impulses travel along nerve cells/neurones. At rest a neurone has a membrane potential of -70mV which is maintained by the action of sodium potassium pumps in the plasma membr...
EB
Answered by Emily B. • Biology tutor
8838 Views

How does antibiotic resistance arise and how can resistance spread?

i. How does antibiotic resistance arise? antibiotic resistance = bacteria that cannot be treated with antibiotics resistance arises when bacterial genes mutate (=a change in base sequence of DNA) - leads to ...
KA
Answered by Keemia A. • Biology tutor
3731 Views