Homework Answers
1. Cytoplasmic membrane has phospholipid bilayer that is embedded with membrane proteins
It protects the cell from outer environment
It selectively permits substances in and out of water in bacteria
2. Peotidoglycan gives structural strength and maintains cells osmatic preasure
It is made up of n- acetyl glucosamine and n-acetyl muramic acid polysacharides
Some bacteria lacks peotidoglycan and has sterol hence it is resistant to antibiotic
3.Gram positive bacteria have a thick peptidoglycan layer and no outer lipid membrane whilst Gram negative bacteria have a thin peptidoglycan layer and have an outer lipid membrane
4. Since the gram positive bacteria has thick peotidoglycan layer it stains crystl violet and retains and gram negative bacteria has thin peptidoglycan layer and it loses crystal violet colour and stain pink in the second staining
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Cell Structure and Function: 1. What is the basic structure of the cytoplasmic membrane, and what...
5. Some prokaryotes lack a cell wall how do they survive in the environment? (2) 6....
5. Some prokaryotes lack a cell wall how do they survive in the environment? (2) 6. What if the important biological activity of the lipid A component of the LPS? (2) 7. What are the two main differences between peptidoglycan in Bacteria and pseudomurein in Archaea? (2) 8. Most Archaea have a cell wall called the S-layer, what is it made from, where is it always found and how does it function? (3) 9. What is the difference between a...
what are the main features of a prokaryotes? what are their chemical makeup, role/function, and how...
what are the main features of a prokaryotes? what are their chemical makeup, role/function, and how they may or may not differ between gram-positive and gram-negative bacteria or archaea Capsule (is there another term for this? An analogous structure?) Cell wall Cell Membrane Pili Flagellum Chromosome Nucleoid Endospores Ribosome inclusions
QUESTION 15 Why is crystal violet used in the Gram stain retained in the cell wall...
QUESTION 15 Why is crystal violet used in the Gram stain retained in the cell wall of Gram positive bacteria, but not in Gram negative bacteria? Gram positive bacteria have a thick peptidoglycan layer while Gram negative bacteria have a thin peptidoglycan layer. Gram positive bacteria form spores and Gram negative do not. O Gram positive bacteria have no peptidoglycan layer and Gram negative bacteria have a thick cell wall O Gram positive bacteria have capsules and Gram negative bacteria...
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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,...
1) Without prokaryotes... a) much decomposition in the soil would stop b) PCR would be much...
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43.Lipopolysaccharides (LPS) are found in: a. Gram-positive bacteria b. Gram-negative bacteria c. all Bacteria d. Archaea...
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...
Gram-positive and gram-negative bacteria differ in that A. Gram-positive bacteria have more peptidoglycan in their cell...
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...
Match the prokaryotic cell structure with its function(s) or its role(s) in disease by placing the letter(s) on the bla...
Match the prokaryotic cell structure with its function(s) or its role(s) in disease by placing the letter(s) on the blank line. Note: Each structure may have more than one function/role associated with it. However, each function/role will be used only one time. (1/4 pt. each correct answer; -1/4 pt. each incorrect answer) Prokaryotic Cell Structure Function or Role in Disease Peptidoglycan Site of protein synthesis (a.k.a., translation) Flagellum (flagella); Axial fibrils (a.k.a, endoflagella, periplasmic flagella) Reception and processing of electrochemical...
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94) The most common infectious disease's) is/are A) colds C) hepatitis. B) İnfluenza. D) gonorrhes 95) Which organism causes the highest number of sexually transmitted diseases each year? A) Treponema pallidum C) Trichomonas vaginalis B) Chlamydia trachomatis D) Neisseria gonorrhoeae 96) The ability of humans to resist a disease is called A) dormancy. B) resistance D) susceptābility. C) immunity. 97) Viral size is generally measured in A) micrometers. D) picometers. C) nanometers B) centimeters. 98) A virus that kills its...
5. Some prokaryotes lack a cell wall how do they survive in the environment? (2) 6. What if the important biological activity of the lipid A component of the LPS? (2) 7. What are the two main differences between peptidoglycan in Bacteria and pseudomurein in Archaea? (2) 8. Most Archaea have a cell wall called the S-layer, what is it made from, where is it always found and how does it function? (3) 9. What is the difference between a...
QUESTION 15 Why is crystal violet used in the Gram stain retained in the cell wall of Gram positive bacteria, but not in Gram negative bacteria? Gram positive bacteria have a thick peptidoglycan layer while Gram negative bacteria have a thin peptidoglycan layer. Gram positive bacteria form spores and Gram negative do not. O Gram positive bacteria have no peptidoglycan layer and Gram negative bacteria have a thick cell wall O Gram positive bacteria have capsules and Gram negative bacteria...
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,...
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