Test Form Please enable JavaScript in your browser to complete this form.Please enable JavaScript in your browser to complete this form.What is the function of ribosomes in a cell?Ribosomes make proteins by joining amino acids together.Define the term "ecosystem."An ecosystem is all the living things and non-living things in an area and how they interact.Name two components of blood and state their functions. Red blood cells – carry oxygen. White blood cells – help fight infection.Calculate the cardiac output if stroke volume is 80 ml and heart rate is 70 beats per minute. Show your working. Cardiac output = stroke volume × heart rate = 80 ml × 70 = 5600 ml per minute or 5.6 litres per minuteWhy do plants need potassium ions from the soil?Potassium helps enzymes work in photosynthesis and helps plants grow properly.Write the word equation for anaerobic respiration in animals during vigorous exercise.Glucose → Lactic acidExplain why enzymes are specific to their substrates using the "lock-and-key" model. Each enzyme has a shape that only fits a certain substrate, like a key fits only one lock.What is meant by the term "limiting factor" in photosynthesis? A limiting factor is something that slows down photosynthesis if it’s in short supply, like light, carbon dioxide, or temperature.Submit
