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In DNA replication, first the hydrogen bonds between the nitrogenous bases are broken catalysed by the enzyme helicase, causing the DNA double helix to unwind and unzip, leaving the nitrogenous bases expo...

Firstly, increase the power outside the brackets by 1 and divide the whole thing by the new power. This gives 3/4(4x+1)^4/3Next, divide the whole thing by the derivative of the bracket. The deri...

White cell (macrophage/neutrophil) detects bacteria antigen by binding to cell surface receptorsWhite cell engulfs bacteria (this is endocytosis), bacteria is held in a phagosome Lysosomes enter phagosome...

The first step is to calculate the moles of the reactant CH₃CH₂CH₂Br. To do this you need the formula:moles = m/Mr where m is the mass in grams and Mr is the molar mass wh...

Throughout this passage, a foreboding and menacing atmosphere is masterfully evoked by Virgil. From the very first sentence of this passage we are on tenterhooks, with the delaying of the verb 'raduntur' ...