Cells & Microscopy
This structure controls the activities of a cell and contains genetic material.
What is the nucleus?
This organ produces hydrochloric acid and begins the digestion of proteins.
What is the stomach?
This green pigment absorbs light energy for photosynthesis.
What is chlorophyll?
The net movement of particles from an area of high concentration to an area of low concentration.
What is diffusion?
These biological molecules act as catalysts in living organisms.
What are enzymes?
The equation used to calculate the size of an image compared to the actual size of an object.
What is magnification = image size ÷ actual size?
This enzyme breaks down starch into maltose.
What is amylase?
This gas is released as a by-product of photosynthesis.
What is oxygen?
The movement of water molecules through a partially permeable membrane from a dilute solution to a concentrated solution.
What is osmosis?
This food test uses Benedict's solution and heating.
What is the test for reducing sugars/glucose?
This type of microscope doesn't use light, and produces images with much higher resolution.
What is an electron microscope?
This part of the alimentary canal absorbs most digested food molecules into the bloodstream.
What is the small intestine (ileum)?
This process releases energy from glucose in cells.
What is respiration?
This process requires energy and moves substances against a concentration gradient.
What is active transport?
This reagent turns blue-black in the presence of starch.
What is iodine solution?
These cells are unspecialised, can divide repeatedly, and can differentiate into specialised cell types.
What are stem cells?
The process by which a bolus moves through the alimentary canal.
What is peristalsis?
The (singular) organelle in which aerobic respiration takes place.
What is the mitochondrion?
These pores on the surface of leaves allow gases to enter and leave.
What are stomata?
The shape of an enzyme's active site is altered permanently when exposed to very high temperatures. This process is called...
What is denaturation?
A virus with a diameter of 120 nm appears 6 cm wide in an electron micrograph. This is the magnification of the image.
What is 500,000×?
(image size/actual size)
60mm × 1000 = 60,000 um
60,000 um × 1000 = 60,000,000 nm
60,000,000/120 = 500,000×
This enzyme is produced by the pancreas, works best in alkaline conditions, and breaks proteins into amino acids.
What is trypsin (protease)?
This is the balanced symbol equation for photosynthesis.
What is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂?
This adaptation of the spongy mesophyll maximises the rate of diffusion of carbon dioxide through a leaf.
What are large (intercellular) air spaces?
This food test produces a lilac or purple colour if peptide bonds are present.
What is the Biuret test?