Carbon dioxide and oxygen are molecules that can move freely across a plasma membrane. What determines...
Homework Answers
The direction that carbon dioxide and oxygen molecules move is determined by :-
B. concentration gradient across the plasma membrane
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Carbon dioxide and oxygen are molecules that can move freely across
a plasma membrane. What determines...
What structures are found in the cytoplasm, near the plasma membrane, at the axonal end of...
What structures are found in the cytoplasm, near the plasma membrane, at the axonal end of neuron: a) Voltage sensitive Na^+ channels b) Neurotransmitter Receptors c) Secretory vesicles d) mitochondria e) nucleus What protein is found (evenly distributed) along the entire length of the cell's plasma membrane: a) Voltage sensitive Na^+ channels b) Neurotransmitter Receptors c) Secretory vesicles d) nucleus e) mitochondria Proteins found exclusively at the dendritic end of the neuron: a) Voltage sensitive Na^+ channels b) Neurotransmitter Receptors...
Membrane Permeability a. What molecule makes up the majority of the cell membrane and how does...
Membrane Permeability a. What molecule makes up the majority of the cell membrane and how does its structure create the semi-permeable nature of the membrane? b. For each of the following molecules describe whether or not it can freely diffuse across a cell membrane. Justify your answers. RNA, Cholesterol, Carbon Dioxide (CO2), Sodium ions (Na+), please be as detail as possible.
9. Some diseases result from defective transport across the membrane. For example, cystic fibrosis results when...
9. Some diseases result from defective transport across the membrane. For example, cystic fibrosis results when a chloride ion transporter does not function. Which of the following is affected when this transporter does NOT function? the electrical gradient of the cell neither the chloride gradient nor the electrical gradient of the cell the chloride concentration gradient both the chloride concentration gradient and the electrical gradient of the cell 10. Which way does the water move if the cell is in...
Here are visual representations (ball-and-stick and space-filling models) of four molecules: carbon dioxide, oxygen, water, and...
Here are visual representations (ball-and-stick and space-filling models) of four molecules: carbon dioxide, oxygen, water, and ozone. Part 1Which of these molecules contain polar bonds, and which contain nonpolar bonds? Sort the images accordingly.Part 2Which of these four molecules is nonpolar despite the fact that it contains polar bonds?Choose one:A. carbon dioxideB. oxygenC. waterD. ozonePart 3Which of these four molecules is polar and contains polar bonds?Choose one:A. carbon dioxideB. oxygenC. WaterD. ozonePart 4Which of these four molecules is polar despite the...
Special channels called aquaporins allow water to move between cells. These channel proteins are selective- they...
Special channels called aquaporins allow water to move between cells. These channel proteins are selective- they freely let water molecules through the membrane but NOT ions or other molecules- but (like leak channels) are not gated.Based on those facts, state which of the following would be the most likely to determines the direction (and how quickly) water can move across a membrane using aquaporins, and (in a few sentences) explain your answer. how much ATP is present inside the cell...
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...
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...
Which of the following molecules would require a transport protein to cross the membrane? A. Carbon...
Which of the following molecules would require a transport protein to cross the membrane? A. Carbon Dioxide B. Oxygen C. Glucose D. A&B E. All of the above What is energy coupling? A. An enzyme reducing activation energy B. The hydrolysis of ATP to ADP and inorganic phosphate C. The use of energy released from an exergonic reaction to power an endergonic reaction D. All of the above are examples of energy coupling Peroxisomes A.Contains enzyme to produce hydrogen peroxide...
What molecules enable cells to respond to a specific extracellular signaling molecule? a. Specific receptor carbohydrates...
What molecules enable cells to respond to a specific extracellular signaling molecule? a. Specific receptor carbohydrates localized to the inner plasma membrane surface b. Plasma lipid bilayer c. Ion channels d. Receptors that specifically recognize and bind that particular messenger molecule
What would happen to Photosynthesis if H+ could freely move across the thylakoid membranes? HTML Editor...
What would happen to Photosynthesis if H+ could freely move across the thylakoid membranes? HTML Editor B IV AA- Ix E3 3 3 3 x'x, DE A newly discovered cell organelle is found to produce or use up the following molecules: Produce Use Up No Change ATP ADP + Pi CO2 NADPH NADP+ 3-carbon sugar 02 Based on these data, which metabolic process is taking place in this organelle? Glycolysis Krebs cycle Electron transport/oxidative phosphorylation Light dependent reactions of photosynthesis...
What structures are found in the cytoplasm, near the plasma membrane, at the axonal end of neuron: a) Voltage sensitive Na^+ channels b) Neurotransmitter Receptors c) Secretory vesicles d) mitochondria e) nucleus What protein is found (evenly distributed) along the entire length of the cell's plasma membrane: a) Voltage sensitive Na^+ channels b) Neurotransmitter Receptors c) Secretory vesicles d) nucleus e) mitochondria Proteins found exclusively at the dendritic end of the neuron: a) Voltage sensitive Na^+ channels b) Neurotransmitter Receptors...
Here are visual representations (ball-and-stick and space-filling models) of four molecules: carbon dioxide, oxygen, water, and ozone. Part 1Which of these molecules contain polar bonds, and which contain nonpolar bonds? Sort the images accordingly.Part 2Which of these four molecules is nonpolar despite the fact that it contains polar bonds?Choose one:A. carbon dioxideB. oxygenC. waterD. ozonePart 3Which of these four molecules is polar and contains polar bonds?Choose one:A. carbon dioxideB. oxygenC. WaterD. ozonePart 4Which of these four molecules is polar despite the...
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...
Which of the following molecules would require a transport protein to cross the membrane? A. Carbon Dioxide B. Oxygen C. Glucose D. A&B E. All of the above What is energy coupling? A. An enzyme reducing activation energy B. The hydrolysis of ATP to ADP and inorganic phosphate C. The use of energy released from an exergonic reaction to power an endergonic reaction D. All of the above are examples of energy coupling Peroxisomes A.Contains enzyme to produce hydrogen peroxide...
What would happen to Photosynthesis if H+ could freely move across the thylakoid membranes? HTML Editor B IV AA- Ix E3 3 3 3 x'x, DE A newly discovered cell organelle is found to produce or use up the following molecules: Produce Use Up No Change ATP ADP + Pi CO2 NADPH NADP+ 3-carbon sugar 02 Based on these data, which metabolic process is taking place in this organelle? Glycolysis Krebs cycle Electron transport/oxidative phosphorylation Light dependent reactions of photosynthesis...
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