Question

Some pretty intense microbio questions:

True and False question, if false then explain why (If you could cited from where you know this, it would be great<3)

1. gram postive bacterium is characterized by a thick cell wall (150A) wheras a gram negative bacterium is characterized by a thin cell wall (100A)

2.  Survival as a spore for members of the Beggiatoaceae is due to the accumulation of HHB granules as a food reserve.

3. An organism growing in a sealed can of sliced peaches packed in a heavy syrup might be categorized as an aerobic saccharophile

Answer 1

1. The difference between gram positive and gram-negative bacteria is the cell wall. Gram positive bacteria have a cell wall composed of peptidoglycan and teichoic acid. Which ranges between 15-80 nm. They lack outer cell membrane. Conversely, gram negative bacteria have thin cell walls of peptidoglycan than ranges between 1.5-10 nm. They also have an outer cell membrane made up of liposaccharide. 1 nm= 10 A. Hence, 15 nm= 150 A and 10= 100A. Thus, gram positive bacteria can have a cell wall of 150A while gram negative bacteria can have a cell wall of 100A. T

Statement is true.

2. The Beggiatoaceae species are colorless filamentous proteobacteria that are sulfide oxidizers. They can store elemental sulphur in its outer membrane. Vitreoscilla sp, a type of Beggiatoa, produces a type if haemoglobin called VHB. They do produce cysts and spores during harsh environmental conditions. These spores have PHB (Poly beta hydroxybutyrate) granules as reserve sources of carbon and energy.

Statement is false.

3. Saccharophiles are organism that grow in high sugar environment. The heavy syrup will provide high sugar environment. However, Canning will prevent aerobic conditions as these are airtight containers. Further, the heavy sugar syrup will also cause anaerobic conditions. Hence, the saccharophile should be an anaerobe and not and aerobe.

Statement is false.         

As per Chegg’s rules, references cannot be included.