Leeuwenhoek described microorganism as Animalcules Prokaryot

Leeuwenhoek described microorganism as? Animalcules. Prokaryotes. Eukaryotes. Protozoa. Which of the following was not mentioned as a central pathway for glucose metabolism? Entner-Doudoroff pathway. The Pentose Phosphate way. Glycolysis. Fermentation. Answers A and B. In a health Gram negative cell, which of these would you expect to be the most exterior to the cell? Lipid A. O-side chain. ATP synthase. Secondary active transport proteins. Axial filaments would be associated with: Flagella on a bacillus. Biofilm construction. Spirochete motility. Gram negative outer membranes. N-Acetyl Glucosamine associates with which of the following? N-acetyl numeric acid only. N-acetyl numeric acid and N-acetyl glucosamine N-acetyl glucosamine and technical acid. N-acetyl numeric acid and lipotechoic acid. Leeuwenhoek examined rain and pond water for microorganisms. He found some bacteria in one sample while the other did not contain any life. The independent variable in this procedure was: The presence or absence of bacteria. Where the water was obtained from. How long the water was allowed to be examined on his scope. The possibility that the bacteria in a sample was introduced by the microscope itself.

Solution

14. a (Animalcules)

Leeuwenhoek observed micro-organisms for the first time in microscope. They appeared to be little animals to him so he called them animalcules. These descriptions were made for the first time which made him the first microbiologist.

15. b. Pentose Phosphate pathway

Glycolysis and Fermentation are central pathways for carbohydrate metabolism for almost all aerobes and Anaerobic organisms. ED pathway uses enzymes like 6-phospho gluconate dehdrogenase and convert glucose to pyruvate in organisms like Pseudomonas. Pentose Phosphate pathway is an alternate glucose oxidation pathway to produce NADPH rather than being a central metabolic pathway,

16. b. O-specific polysaccharide chain

O-specific poly sccharide chain is the outer most part of outer membrane of Gram Negative cell wall. Gram negative cell wall has has two membranes outer and inner separated by a periplasmic space filled with Lipoproteins.

17. c. Spirochaete motility

Spirochetes are spiral cells contain an axial filament wrapped around them. They are similar to flagella and are used for motility of the organism.

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