996 past contests
Topic 18 · The biuret test identifying protein
Topic 18 · The mercury nitrate test for protein (millon's-type reaction)
Topic 5 · Riddle: chlorophyll, named by pelletier and caventou
Topic 35 · Osmosis moves water from a dilute to a concentrated solution, not the reverse (true/false)
Topic 35 · Correct definition of osmosis: water from dilute to concentrated solution (true/false)
Topic 35 · Osmosis concerns water movement, not solute movement (true/false)
Topic 29 · All arthropods share a hard exoskeleton, segmented body, and jointed legs (true/false)
Topic 8 · During molting, only the outer cuticle is shed while inner layers are enzymatically digested (true/false)
Topic 29 · Insects distinguished by three leg-pairs and typically two wing-pairs on the thorax (true/false)
Topic 34 · Problem of the day: demonstrating root pressure with eosin solution and glass tubing
Topic 18 · Starch as the main storage carbohydrate in plants
Topic 18 · Sucrose as the transported form of carbohydrate in plants
Topic 34 · Roots obtaining food via phloem transport from photosynthesizing leaves
Topic 23 · Anthocyanins and protruding stigma not specifically a bee-pollination adaptation
Topic 23 · Spiky/sticky pollen as an adaptation for bee pollination
Topic 23 · Coloured petals as an adaptation for bee pollination
Topic 5 · Destarching a potted plant's leaves by prolonged darkness
Topic 27 · Riddle: lichen as a fungus-algae/cyanobacteria symbiosis
Topic 5 · Iodine test confirming a leaf has been destarched
Topic 5 · Starch reappearing in a destarched, light-exposed leaf as evidence of photosynthesis