Australia is also the only continent that is governed as a single country. It is sometimes informally referred to as an 'island' continent, surrounded by oceans. Our ocean territory is also the third-largest in the world, spanning three oceans and covering around 12 million square kilometres.
Benedict's Reagent is used to detect reducing sugars. What the reagent does is to oxidize aldehydes or alpha hydroxyl ketones. When this happens the color of the reagent turns from blue to colorless by the reduction of copper(II) to Copper(I) that is colorless.
Enteric bacteria that have the ability to ferment lactose can be detected using the carbohydrate lactose, and the pH indicator neutral red. MacConkey agar is one of the most common agar plates found in a clinical microbiology lab.sing neutral red pH indicator, the agar distinguishes those Gram-negative bacteria that can ferment the sugar lactose (Lac+) from those that cannot (Lac-). This medium is also known as an indicator medium and a low selective medium. Presence of bile salts inhibits swarming by Proteus species.