C: cytosine, thymine and uracil
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Ribosomes exist as separate subunits that are bound together during protein synthesis. What do these subunits consist…
A length of DNA was analysed and sequenced. 24% of its nitrogenous bases were adenine. Which percentage of the bases …
Rifampicin is an antibiotic used to treat tuberculosis (TB). It works by inhibiting RNA polymerase in bacteria. Which…
An enzyme hydrolyses the two heavy polypeptide chains of an antibody molecule. The hydrolysis occurs at the hinge reg…
A light microscope is used to observe two structures that are 200 nm apart. How far apart are the structures when the…
Some features of cells are listed. 1 cytoplasm 2 cell surface membrane 3 ribosomes Which features are found in both a…