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The bowman's capsule, Proximal convoluted tuble, loop of Henle (descending and ascending lims), distal convolued tubule and the collecting duct. The descending limb is permeable to water. The ascending li...
The four letters (nucleotides) in our DNA code - ATGC - code for the thousands of different proteins that make up our metabolism and our human body. Proteins are made up of modular building blocks known a...
Double-helix DNA strands are separated by breaking the hydrogen bonds between complementary bases. One strand acts as a template strand which complementary bases bind to (adenine to uracil, thymine to ade...
During mitosis a cell undergoes DNA and organelle duplication followed by a single division, each haploid daughter cell produced this way is genetically identical to the parent cell. In contrast to this m...
The arrival of a nerve impulse at a synapse causes Ca2+ channels to open (1 mark). Ca2+ ions enter the presynaptic knob by facilitated diffusion (1 mark). The presence of Ca2+ ions causes synaptic vesicle...
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