The outer membrane of gram-negative cells is primarily composed of a. peptidoglycan b. lipopolysaccharides c. pili d. cytosol e. a and b
Ans:- e.) a and b
The outer membrane of gram negative cells is primarily composed of peptidoglycan and lipopolysaccharides.
The outer membrane of gram-negative cells is primarily composed of a. peptidoglycan b. lipopolysaccharides c. pili...
43.Lipopolysaccharides (LPS) are found in: a. Gram-positive bacteria b. Gram-negative bacteria c. all Bacteria d. Archaea e. Eukaryotes ------------------------- 44. There are similarities and differences between Gram-negative and Gram-positive bacteria. Which of the following is not true? a. The cell wall of Gram-negative cells is composed of only one or two layers of peptidoglycan whereas the cell walls of Grampositive bacteria have many peptidoglycan layers b. Only Gram-positive bacterial cells have a periplasm 2/6/18 8 c. The cell membranes of...
What functions to anchor peptidoglycan to the cytoplasmic membrane in Gram positive bacteria, but not Gram negative ones? a) Teichoic acid b) Lipoteichoic acid c) flagellin d) phospholipid
Gram-positive and gram-negative bacteria differ in that A. Gram-positive bacteria have more peptidoglycan in their cell walls. B. Gram-positive bacteria have fimbriae but gram-negative bacteria do not. C. Gram-positive bacteria are spiral-shaped, and gram-negative bacteria are either rod-shaped or spherical. D. Only gram-negative bacteria can form endospores. E. There is no difference between gram negative and gram positive bacteria F. Gram positive are positively charged and gram negative are negatively charges An unknown bacterial species was found in the blood...
The membrane spanning region of an integral membrane protein is primarily composed of which type of amino acids? A. non-polar B. polar C. basic D. acidic
Which of the following has peptidoglycan as a major constituent of cell wall? A. Gram-negative bacteria B. Gram-positive bacteria C. Fungi D. None of these
20.) The term spheroplast applies to a gram-negative bacterial cell which .......? A.) is likely to lyse due to the osmosis shock b.) is just about to ready to produce a spore c.) is fighting off an infection by becteriophages d.) has lost its peptidoglycan layer of the cell wall e.) is lacking a cell wall 17) Peptidoglycan is a polymer consisting of the following chemical constituents (1 pts) ON-acetyglucosamine (AGA), N-acetylmuramic acid, and a peptide chain ON-AGA, N-AMA, teichoic...
29) The peptidoglycan chain is made up of polymers of a) alanine and glycine b) cytosine and guanine e) glucose and ribose d) ATP and protein N-acetylmuramic acid and N-acetylglocosamine 30) Safranin is a counterstained used in the gram stain procedure because a) cells will not stain gram positive without it b) safranin accentuates the gram positive stain the gram negative cells will be unstained otherwise d) the purple color is hard to see in the microscope e) all of...
Peptidoglycan is cross-linked between what constituents in gram-negative bacteria? A. N-acetylglucosamine residues B. N-acetylmuramic acid residues C. glycine amino acids D. DAP and D-alanine amino acids E. A & C F. None of the above
Answer all Identify whether the following are true of Gram-positive or Gram-negative bacteria. Has a cell wall Has a second outer membrane Contains the molecule LPS, which triggers an immune response through TLR proteins Contains the bacteria that cause cholera Ampicillin and amoxicillin are specific to this type as they block peptidoglycan production
1.) Mycoplasmas are bacteria that lack a peptidoglycan las There are 27 an layer or outer membrane. Therefore, on the basis A) they would stain pink with gram stain. B) they would stain purple with gram stain C) they also lack a cell membrane. D) they would look just like animal cells. use light energy to generate chemical 2.) How would you classify a purple non-sulfur bacteria, which can u energy, but requires carbon from a source other than CO,...