29) Bacterial pili, would best be described as: a) structures which join bacteri

Question

29) Bacterial pili, would best be described as: a) structures which join bacteria for exchange of genetic information (conjugation) ) the site for protein synthesis c structures which manufacture and transport membrane proteins d) selectively permeable e) loosely attached layers capable of providing motility membranes which mediate the movement out of a cell Bacteria with several layers of peptidoglycan in their cell walls are classified as: a) Gram negative b) Gram positive c) mycoplasmas d) cyanobacteria e) spirochetes 31) All but which of the following are products of the Krebs cyele? a) 6 NADH+H b) 2 FADH2 c)2 ATP d citric acid e) acetyl groups 32) Which phase of cellular respiration is always anaerobic? a) citric acid cycle b) ETS c) transition d) glycolysis e) Krebs cycle which then 33) The transition step produces two (2) molecules of enter the a) pyruvic acid/ electron transport system b) acetyl groups/Krebs cycle n c acetyl groups/ electron transport system d) coenzyme Q/ Calvin cycle e) oxaloacetic acid/ Krebs cycle 34) The fina a) coenzyme Q b) carbon monoxide c) phenylalanine I electron acceptor in the electron transport system of anaerobic cells is: 0 tom form of a carbon,nitrogen or sulfur compound e) 02

Explanation / Answer

Ques 29: Right ans is a, pili is a hair like structure present on the surface of bacteria require for bacterial conjugation and help in transfer of genetic material and also help in bacterial movement

Ques 30: Right ans is b, bacteria have several layars of peptidoglycan are called gram positive bacteria because Gram stain bound strongly in these layers and can visualize purple colour under microscope thats why these are called Gram positive bacteria and Gram negative bacteria have less peptidoglycan layer thats why these not bound Gram stain.

Ques 31: Right ans is d, NADH, FADH and ATP all are the product of Kreb's cycle but citric acid is the first product formed from acetyl coA is the last product of glycolysis. Kreb's cycle is also called citric acis cycle.

Ques 32: Right ans is d, glycolysis occurs in both aerobic and anaerobic condition. anaerobic condition is called fermentation. All phase are always aerobic.

Ques 33: Right ans is b, two molecules of acetyl group enter in Kreb cycle form citric acid.

Ques 34: Right ans is d, because anaerobic means without oxygen  

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