Which of the following is not a prominent role played by proteins in living organisms? Act as signaling molecules , provide structural support, catalyze enzymes, store genetic information, transport across lipid membranes, antibodies to help fight infection plese help
Which of the following is not a prominent role played by proteins in living organisms? Act as signaling molecules , provide structural support, catalyze enzymes, store genetic information, transport across lipid membranes, antibodies to help fight infection plese help
For unlimited access to Homework Help, a Homework+ subscription is required.
Related textbook solutions
Related questions
QUESTION 6
Which of the following is not true for Gram-negative, acid-fast, and archaeal membranes?
| a. | They modify their lipid content in response to environmental changes. | |
| b. | They have co-evolved the same outer membrane composition and structure. | |
| c. | They all have a cytoplasmic membrane. | |
| d. | Membrane transport proteins regulate nutrient uptake and waste removal. |
1 points
QUESTION 7
Compared to Mycobacteria, Gram-negative bacterium contain:
| a. | More mycolic acid. | |
| b. | Pores of increased length. | |
| c. | Less peptidoglycan. | |
| d. | 50-fold-lower numbers of porins. |
1 points
QUESTION 8
Archaea are found to survive in strongly acidic lakes compared to bacteria and Eukaryotes. Which of the following supports this claim according to the study?
| a. | The presence of L-glycerol ether linked lipids in Archaea membranes. | |
| b. | The presence of D-glycerol ether linked lipids in Archaea membranes. | |
| c. | The presence of L-glycerol ester linked peptidoglycans in Archaea membranes. | |
| d. | The presence of L-glycerol ester linked lipids in Archaea membranes. |
1 points
QUESTION 9
Based on your understanding of the symbiotic relationship between Nanoarchaeum equitans and Ignicoccus, which of the following below is not true?
| a. | The membrane lipids of N. equitans are synthesized by Ignoccocus. | |
| b. | In exchange for membrane lipids, N. equitans provide Ignicoccus with many essential cytoplasmic enzymes. | |
| c. | N. equitans lack enzymes capable of catalyzing lipid biosynthesis. | |
| d. | Intraperiplasmic vesicles produced by Ignicoccus allow for lipid transfer to N. equitans. |
1 points
QUESTION 10
What is the role of hydrogen bonds in bacteria, as mentioned in the article?
| a. | They mediate transmembrane electron flow. | |
| b. | They mediate lipid biosynthesis. | |
| c. | They help to stabilize the cytoplasmic membrane. | |
| d. | They are responsible for the selective permeability of the cytoplasmic membrane. |
1 points
QUESTION 1
Which of the following statements about the bacterial cytoplasmic membrane is false?
| a. | It resists attachment of the bacterial chromosome to its inner surface. | |
| b. | It contains a protein complex that drives ATP synthesis. | |
| c. | It is asymmetric. | |
| d. | It consists of relatively equal amounts of phospholipids and proteins. |
1 points
QUESTION 2
Which of the following statements regarding Mycobacteria is false?
| a. | The genome has relatively low Guanine (G) and Cytosine (C) content. | |
| b. | The cytoplasmic membrane is surrounded by a polymer (peptidoglycan) consisting of alternating N-Acetylglucosamine (NAG) and N-Acetylmuramic (NAM) acid units. | |
| c. | It infects approximately one-third of the global human population. | |
| d. | It has a Gram-positive cell wall with an additional waxy lipid layer of mycolic acid. |
1 points
QUESTION 3
Which of the following outer membrane porins enables Mycobacteria to adapt to acidic and intracellular environments, and shows homology to outer membrane porin A?
| a. | OmpATb. | |
| b. | OmpA. | |
| c. | MspA. | |
| d. | Lipid A. |
1 points
QUESTION 4
Based on your understanding of bacterial membranes, which of the following is not likely to be found in an E. coli outer membrane?
| a. | Membrane-anchored enzymes. | |
| b. | Mycolic acid. | |
| c. | Lipopolysaccharide. | |
| d. | Porin channels. |
1 points
QUESTION 5
Based on the conclusions of this paper, which of the following statements would the author most likely disagree with?
| a. | Some archaeon do not contain all of the genes essential for life. | |
| b. | The membrane structures of prokaryotes show far greater diversity than those of eukaryotes. | |
| c. | As demonstrated in this definitive report, scientists have a great understanding of the majority of basic functions and evolution of bacterial membranes. | |
| d. | The outer membrane (and its associated components) of archaea, Gram-negative bacteria, and Gram-positive bacteria likely evolved independently of one another. |
1 points
QUESTION 6
Which of the following is not true for Gram-negative, acid-fast, and archaeal membranes?
| a. | They modify their lipid content in response to environmental changes. | |
| b. | They have co-evolved the same outer membrane composition and structure. | |
| c. | They all have a cytoplasmic membrane. | |
| d. | Membrane transport proteins regulate nutrient uptake and waste removal. |
1 points
QUESTION 7
Compared to Mycobacteria, Gram-negative bacterium contain:
| a. | More mycolic acid. | |
| b. | Pores of increased length. | |
| c. | Less peptidoglycan. | |
| d. | 50-fold-lower numbers of porins. |
1 points
QUESTION 8
Archaea are found to survive in strongly acidic lakes compared to bacteria and Eukaryotes. Which of the following supports this claim according to the study?
| a. | The presence of L-glycerol ether linked lipids in Archaea membranes. | |
| b. | The presence of D-glycerol ether linked lipids in Archaea membranes. | |
| c. | The presence of L-glycerol ester linked peptidoglycans in Archaea membranes. | |
| d. | The presence of L-glycerol ester linked lipids in Archaea membranes. |
1 points
QUESTION 9
Based on your understanding of the symbiotic relationship between Nanoarchaeum equitans and Ignicoccus, which of the following below is not true?
| a. | The membrane lipids of N. equitans are synthesized by Ignoccocus. | |
| b. | In exchange for membrane lipids, N. equitans provide Ignicoccus with many essential cytoplasmic enzymes. | |
| c. | N. equitans lack enzymes capable of catalyzing lipid biosynthesis. | |
| d. | Intraperiplasmic vesicles produced by Ignicoccus allow for lipid transfer to N. equitans. |
1 points
QUESTION 10
What is the role of hydrogen bonds in bacteria, as mentioned in the article?
| a. | They mediate transmembrane electron flow. | |
| b. | They mediate lipid biosynthesis. | |
| c. | They help to stabilize the cytoplasmic membrane. | |
| d. | They are responsible for the selective permeability of the cytoplasmic membrane. |