Homework Answers
7 b. Cholesterol
8. a. Ester
25. b. Top and bottom
Bacterial flagella grow by addition of subunits at the top, while eukaryotic and archeal flagella grow by addition od subunits to the bottom.
27. b. 50S
Prokaryotic ribosomes are 70S consisting of 50S and 30S subunits.
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Microbiology questions
Bacterial membrane
7) All of the following are found in bacterial membranes except: Hopanoids...
9 , What feature of eukeryotic cytoplasmic membranes differentiates it the most from prokaryotic cytoplasmic membranes?...
9 , What feature of eukeryotic cytoplasmic membranes differentiates it the most from prokaryotic cytoplasmic membranes? Prokeryotic cytoplesmic membranes do not contain phospholipids. The composition of the phospholipid layer facing the outside of the cell is significently different compared to the lipid layer facing the cytoplesm. Unique proteins penetreting the cytoplesmic membrane. (Hint are there unique cytoplasmic membrane-protein differences found in eukeryotic cells?) Eukaryotic cytoplasmic membranes do not contain phospholipids Staphylococcus species can be distinguished from Streptococcus, Enterococcus, and Lactococcus...
SIC Which of these statements about the composition of biological membranes is TRUE? A. In a...
SIC Which of these statements about the composition of biological membranes is TRUE? A. In a given eukaryotic cell type (for example, a hepatocyte), all intracellular membranes have essentially the same complement of lipids and proteins. B. The carbohydrate found in membranes is virtually all in glycolipids. C. The plasma membranes of the cells of vertebrate animals contain more cholesterol than the mitochondrial membranes. D. The ratio of lipid to protein are the same among cell types in a single...
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of...
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
Which of the following statements are true? a. All membrane proteins are bound to the interior...
Which of the following statements are true? a. All membrane proteins are bound to the interior of the membrane. b. Both proteins and lipids undergo transverse diffusion from the inner to outer leaflets. c. Some proteins and lipids undergo lateral diffusion along the surface of the membrane. d. Carbohydrates are found covalently attached to molecules on the outside of the membrane. e. The term 'mosaic' describes a highly-ordered region of the membrane rich in cholesterol and sphingolipids.
17) All of the following are characteristics of saturated fats EXCEPT: A) they are usually solid...
17) All of the following are characteristics of saturated fats EXCEPT: A) they are usually solid at room temperature. B) they contain at least one double bond. C) they are found in animals. D) their fatty acids pack tightly together. E) they are used to store energy. 18) All of the following are characteristics of phospholipids EXCEPT: A) they are found in cellular membranes. B) they can form micelles and bilayers. C) they contain fatty acids which associate with water. D) they contain a hydrophilic phosphate "head." E) they contain two...
19. The degree of membrane fluidity depends on . the percentage of lipids that contain choline b. the percentage of glycolipids c. the percentage of faty acids d the percentage of unsaturated far...
19. The degree of membrane fluidity depends on . the percentage of lipids that contain choline b. the percentage of glycolipids c. the percentage of faty acids d the percentage of unsaturated farty acids Membeane proteins can be located a. entirely within the membrane b on the surface of the membeane c. in either position d. the position cannot be determined 20. 21. Which property has not been observed for membrane proseins? a energy storage b. transport of substances into...
please answer ASAP 1) Which of the following is not a common bacterial shape? A) spirochote...
please answer ASAP
1) Which of the following is not a common bacterial shape? A) spirochote B.COCCIES Cdise Dj bacillas 2) The shape of a bacterial cell is determined and maintained by the A) cell membrane B) cell wall C) capsule D) slime laver 3) Which bacterial genus normally lacks a cell wall? A) Mycobacterium B) Streptococcus C) Mycoplasma D) Bacillus 4) Cell membranes are composed primarily of A) phospholipids and sugars B) teicoic acid and proteins C) phospholipids and...
Which of the following statements is true
Which of the following statements is true A. All of these statements are true B. Membrane lipids rarely flip-flop between one monolayer and the other. C. None of these statements are true D. Fluidity of membranes can be moderated by the presence of cholesterol. E. Phospholipids will not spontaneously form liposomes in nonpolar solvents. F. Transmembrane proteins diffuse laterally within the plane of the membrane.
Please answer all parts of this section Which is a characteristic of sphingolipids? a) They all...
Please answer all parts of this section
Which is a characteristic of sphingolipids? a) They all contain a fatty acid joined to glycerol. (b They all contain a long-chain alcohol joined to isoprene. (c) They all contain ceramide joined to a polar group. d) They all contain a carbohydrate joined to a phosphate group. The enzyme hexokinase catalyzes the following reaction Glucose + ATP glucose-6-phosphate+ AD HU- HO OH HO ATP OH O3PO HO ADP OH HO- OH Which compound...
20. Word bank: Hydrophili Triacylglycerols Fatty acids Hydrophobic Amylopectin Phospholipids Glucose can form large polymers that...
20. Word bank: Hydrophili Triacylglycerols Fatty acids Hydrophobic Amylopectin Phospholipids Glucose can form large polymers that are held together by Animals store glucose in long, branched polymers called glucose in long, linear polymers called called the enzyme for degrading Steroids Hydrophilic Cholesterol Cellulose Glycoproteins bonds. Plants store or as branched polymers Animals can digest these polysaccharides, but most lack which serves as dietary fiber Lipids are be stored or broken down for energy down to produce energy. Lipids are stored...
9 , What feature of eukeryotic cytoplasmic membranes differentiates it the most from prokaryotic cytoplasmic membranes? Prokeryotic cytoplesmic membranes do not contain phospholipids. The composition of the phospholipid layer facing the outside of the cell is significently different compared to the lipid layer facing the cytoplesm. Unique proteins penetreting the cytoplesmic membrane. (Hint are there unique cytoplasmic membrane-protein differences found in eukeryotic cells?) Eukaryotic cytoplasmic membranes do not contain phospholipids Staphylococcus species can be distinguished from Streptococcus, Enterococcus, and Lactococcus...
SIC Which of these statements about the composition of biological membranes is TRUE? A. In a given eukaryotic cell type (for example, a hepatocyte), all intracellular membranes have essentially the same complement of lipids and proteins. B. The carbohydrate found in membranes is virtually all in glycolipids. C. The plasma membranes of the cells of vertebrate animals contain more cholesterol than the mitochondrial membranes. D. The ratio of lipid to protein are the same among cell types in a single...
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
19. The degree of membrane fluidity depends on . the percentage of lipids that contain choline b. the percentage of glycolipids c. the percentage of faty acids d the percentage of unsaturated farty acids Membeane proteins can be located a. entirely within the membrane b on the surface of the membeane c. in either position d. the position cannot be determined 20. 21. Which property has not been observed for membrane proseins? a energy storage b. transport of substances into...
please answer ASAP
1) Which of the following is not a common bacterial shape? A) spirochote B.COCCIES Cdise Dj bacillas 2) The shape of a bacterial cell is determined and maintained by the A) cell membrane B) cell wall C) capsule D) slime laver 3) Which bacterial genus normally lacks a cell wall? A) Mycobacterium B) Streptococcus C) Mycoplasma D) Bacillus 4) Cell membranes are composed primarily of A) phospholipids and sugars B) teicoic acid and proteins C) phospholipids and...
Please answer all parts of this section
Which is a characteristic of sphingolipids? a) They all contain a fatty acid joined to glycerol. (b They all contain a long-chain alcohol joined to isoprene. (c) They all contain ceramide joined to a polar group. d) They all contain a carbohydrate joined to a phosphate group. The enzyme hexokinase catalyzes the following reaction Glucose + ATP glucose-6-phosphate+ AD HU- HO OH HO ATP OH O3PO HO ADP OH HO- OH Which compound...
20. Word bank: Hydrophili Triacylglycerols Fatty acids Hydrophobic Amylopectin Phospholipids Glucose can form large polymers that are held together by Animals store glucose in long, branched polymers called glucose in long, linear polymers called called the enzyme for degrading Steroids Hydrophilic Cholesterol Cellulose Glycoproteins bonds. Plants store or as branched polymers Animals can digest these polysaccharides, but most lack which serves as dietary fiber Lipids are be stored or broken down for energy down to produce energy. Lipids are stored...
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