The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:

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#Question id: 31421

#XL - S Microbiology

Which option(s) correctly match(es) the Adherence factor in a bacterial cell (Column I) with their corresponding functions (Column II). 

COLUMN I	COLUMN II
P. Fimbriae	i. Cell envelopes of some archaeobacteria that may promote adherence to surfaces
Q. Glycocalyx	ii. help attach bacteria to other bacteria or to solid surfaces
R. S layer	iii. Cell wall components in gram-positive bacteria that aid in adhesion
S. Teichoic acid	iv. viscous (sticky) and gelatinous polymer

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#Question id: 31422

#XL - S Microbiology

Which type of bacteria have flagella spread evenly over their entire surface?

TLS Online TPP Program

#Question id: 31423

#XL - S Microbiology

Correctly match the bacterial type in Column I with their corresponding environmental niche in Column II.

COLUMN I	COLUMN II
P. Psychrotrophs	i. Can grow at 180°C or Higher
Q. Thermophile	ii. pH greater than 8
R. Alkalophile	iii. Optimum 30°C to maximum around 35°C
S. Halophile	iv. Growth more rapid at high hydrostatic pressure
	v. Salt concentration greater than 2M

TLS Online TPP Program

#Question id: 31424

#XL - S Microbiology

Which bacterial cell wall component is recognized by the immune system as an endotoxin?

TLS Online TPP Program

#Question id: 31425

#XL - S Microbiology

In E.coli, the bd branch of the electron transport chain is utilized under__

TLS Online TPP Program

#Question id: 31426

#XL - S Microbiology

What distinguishes the second lag phase from the first in a diauxic growth curve?