Homework Answers
Answer. The locations of their polar and non-polar amino acids.
Because the proteins are made up of polar and non-polar amino acids. The non polar amino acids are attracted by phospholipid tails and repelled by water,whereas, the polar part is attracted by water on both inside and outside of the cell.
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Question 7 (1 point) Integral membrane proteins stay in membranes because of their small size, which...
WINILIT OF the following statements is true about biological membranes? Integral membrane proteins are composed exclusively...
WINILIT OF the following statements is true about biological membranes? Integral membrane proteins are composed exclusively of alpha-helices Lipid bilayers are easily permeable to various ions Both proteins and lipids readily undergo transverse diffusion ("flip-flopping") from the inside to the outside leaflet of the membrane O Membrane lipids self-assemble via non-covalent interactions to form lipid bilayers O Polar head groups in membrane phospholipids are always negatively charged
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic of all a. Channel proteins can assist polar molecules to cross the plasma membrane by facilitated diffusion b. The gated ion channel can allow ions to pass when stimulated to open. c. The surface of a channel protein in contact with the bilayer would likely have hydrophilic amino acids d. Water plays a role in determining which ions are allowed to pass through an...
glow) is false of the carrier proteins? molecules in cases, the rate or cases, the rate...
glow) is false of the carrier proteins? molecules in cases, the rate or cases, the rate of diffusion 20. Which label in the graph represents saturation of the sa 71 According to the graph, as the number of glucose mo increases indefinitely b. decreases Cincreases until a plateau is reached d can either increase or decrease. cremains the same diated endocytosis. Which of the 79The figure below shows the process of receptor-mediated following statements regarding this process is false? Coated...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion of _________________ hydrocarbon tails, enabling them to stay fluid.For example, cold-adapted organisms such as winter wheat increase the percentage of _________________ phospholipids in their membranes in the autumn to prevent the membranes from solidifying during winter.There are two major populations of membrane proteins: ___________ and _____________.Integral proteins penetrate the hydrophobic interior of the lipid bilayer, usually completely spanning the membrane as ________________ proteins.________________ proteins...
Which of the following statements correctly matches a membrane protein with its function. -Structural proteins bind...
Which of the following statements correctly matches a membrane
protein with its function.
-Structural proteins bind to molecules to facilitate entry to
or exit from the cell.
-Carrier proteins form water-filled channels that allow
molecules to pass through.
-Channel proteins are classified as uniport, symport, or
antiport carriers.
-Receptors transmit signals from the extracellular environment
to the cytoplasm of the cell.
During the cephalic phase of gastric secretion,
-there is an increased flow of action potentials along the
vagus nerve...
1- Proteoglycans are different from peptidoglycans and glycoproteins in that proteoglycans: a. are primarily chains of...
1- Proteoglycans are different from peptidoglycans and glycoproteins in that proteoglycans: a. are primarily chains of polysaccharides, with each polysaccharide covalently linked to one core protein b. are primarily chains of polysaccharides that are covalently linked to each other through a few amino acids c. are primarily proteins that are modified with a few polysaccharides d. are primarily proteins that are modified with one polysaccharide 2- Which of the following statements about tight junctions is FALSE? a. Tight junctions are...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface of the membrane. Net movement of particles from a region where they are more concentrated to a region where they are law concentrated is called Diffusion of water through a selectively permeable membrane down its own concentration gradient It called A solution with an equivalent concentration of water and hence the tame osmotic pressure as the fluid inside the cell is said to be...
Question 11 (1 point) of the following, which type of molecule moves directly across a membrane...
Question 11 (1 point) of the following, which type of molecule moves directly across a membrane most easily? Large polar molecules, such as glucose Small, uncharged non-polar molecules such as 02. lons, such as chloride (CI) Proteins and other macromolecules
Question 5 QUESTION 1 Which of the following molecules protects the membranes from effects of extreme...
Question 5
QUESTION 1 Which of the following molecules protects the membranes from effects of extreme temperature variations? Farnesene Squalene Dolichol Cholesterol QUESTION 2 What is common between histone proteins and spermidine? Histones and Spermidine are negatively charged. Histones and spermidine help DNA attain a random coll conformation They both play a role in DNA packaging. Histone and spermidine are present only in bacteria. QUESTION 3 Which of the following is NOT is product of Kreb's cycle NAD+ ATP FADH2...
I dont understabd the last 3 questions . A single piant cell is placed in an...
I dont understabd the last 3 questions .
A single piant cell is placed in an sotoric solution. Salt is then odded to the sokutlion. wwich ot me totowing wouid occur as a resut of the solt addition Water wouid leave the cell by osmoss. causing the volume of the cytoplosm to decreone. Water would entor the cel by osmosis, and the cel would swe t T The added salt would enter the cel cousing the cell to take up...
WINILIT OF the following statements is true about biological membranes? Integral membrane proteins are composed exclusively of alpha-helices Lipid bilayers are easily permeable to various ions Both proteins and lipids readily undergo transverse diffusion ("flip-flopping") from the inside to the outside leaflet of the membrane O Membrane lipids self-assemble via non-covalent interactions to form lipid bilayers O Polar head groups in membrane phospholipids are always negatively charged
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic of all a. Channel proteins can assist polar molecules to cross the plasma membrane by facilitated diffusion b. The gated ion channel can allow ions to pass when stimulated to open. c. The surface of a channel protein in contact with the bilayer would likely have hydrophilic amino acids d. Water plays a role in determining which ions are allowed to pass through an...
glow) is false of the carrier proteins? molecules in cases, the rate or cases, the rate of diffusion 20. Which label in the graph represents saturation of the sa 71 According to the graph, as the number of glucose mo increases indefinitely b. decreases Cincreases until a plateau is reached d can either increase or decrease. cremains the same diated endocytosis. Which of the 79The figure below shows the process of receptor-mediated following statements regarding this process is false? Coated...
Which of the following statements correctly matches a membrane
protein with its function.
-Structural proteins bind to molecules to facilitate entry to
or exit from the cell.
-Carrier proteins form water-filled channels that allow
molecules to pass through.
-Channel proteins are classified as uniport, symport, or
antiport carriers.
-Receptors transmit signals from the extracellular environment
to the cytoplasm of the cell.
During the cephalic phase of gastric secretion,
-there is an increased flow of action potentials along the
vagus nerve...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface of the membrane. Net movement of particles from a region where they are more concentrated to a region where they are law concentrated is called Diffusion of water through a selectively permeable membrane down its own concentration gradient It called A solution with an equivalent concentration of water and hence the tame osmotic pressure as the fluid inside the cell is said to be...
Question 11 (1 point) of the following, which type of molecule moves directly across a membrane most easily? Large polar molecules, such as glucose Small, uncharged non-polar molecules such as 02. lons, such as chloride (CI) Proteins and other macromolecules
Question 5
QUESTION 1 Which of the following molecules protects the membranes from effects of extreme temperature variations? Farnesene Squalene Dolichol Cholesterol QUESTION 2 What is common between histone proteins and spermidine? Histones and Spermidine are negatively charged. Histones and spermidine help DNA attain a random coll conformation They both play a role in DNA packaging. Histone and spermidine are present only in bacteria. QUESTION 3 Which of the following is NOT is product of Kreb's cycle NAD+ ATP FADH2...
I dont understabd the last 3 questions .
A single piant cell is placed in an sotoric solution. Salt is then odded to the sokutlion. wwich ot me totowing wouid occur as a resut of the solt addition Water wouid leave the cell by osmoss. causing the volume of the cytoplosm to decreone. Water would entor the cel by osmosis, and the cel would swe t T The added salt would enter the cel cousing the cell to take up...
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