Nuclear fission is when a the nucleus of an atom splits into smaller parts (opposite of fusion where two nuclei are joined together into one). Fissi...Learn more

No. They can only give blood to people with the same AB blood type. This is because they produce the A and B antigens which are rejected in other bl...Learn more

I did biochemistry in my undergraduate degree! I absolutely loved it. This is because I really love learning about complex biochemical pathways such...Learn more

Post-transcriptional modifications of proteins!

The ones I know are: Genome Transcriptome Proteome And metabolome

I think it’s because if it’s sex-linked, then it’s in the Y chromosome. The son will only receive one copy of the Y chromosome from his father, and ...Learn more

They are ‘whooshing’ sounds your heart makes (Instead of ‘lub-DUBB’) which can be heard through a stethoscope. They can either be harmless, ‘innocen...Learn more

Through binding to CD4 receptor.

Valves are used to prevent back-flow of blood. The pulmonary vein delivers blood from the heart to the lungs which is a short distance; the heart ca...Learn more

Artificial selection is when humans decide certain characteristics they want to in animals, e.g. high milk production in cows, so they breed them (h...Learn more

Where your blood gets filtered in your kidneys.

Lysis and Centrifugation. Detergent is used to break up the membrane, then cells are spun at extremely high speeds to obtain different sized fractio...Learn more

Yes, what would you like help with?

If they’re polar, then they cannot pass the lipophilic cell membrane. They are able to go through extracellular protein channels.

Environment is constantly changing, forcing species to adapt.

You can multiply 2x with everything inside the brackets to get: (2x x 1/2x) + (2x x 1/4) = (x^2) + (1/2x) = x^2 + x/2 Hope this helps.

Numbers that are next to brackets can be multiplied by everything inside those brackets, so: 3(f+3) —> (3 x f )+ (3 x 3 )and (2 x f ) + ( 2 x 6) Wh...Learn more