Can small lipids diffuse into cell membrane through diffusion?

Can small lipids diffuse into cell membrane through diffusion?
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According to widely accepted “fluid mosaic model” cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect? (a) Proteins in cell membranes can travel within the lipid bilayer. (b) Proteins can also undergo flip-flop movements in the lipid bilayer. (c) Proteins can remain confined within certain domains of the membrane.(d) Many proteins remain completely embedded within the lipid bilayer.

Description : According to widely accepted fluid mosaic model cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several ... domains of the membrane. (d) Many proteins remain completely embedded within the lipid bilayer.

Last Answer : (b) Proteins can also undergo flip-flop movements in the lipid bilayer.

Assertion `:-` The amount of `CO_(20` that can diffuse through the diffusion membrane per unit differnece in partial pressure is much higher compared

Description : Assertion `:-` The amount of `CO_(20` that can diffuse through the diffusion membrane per unit differnece in partial pressure is much higher compared

Last Answer : Assertion `:-` The amount of `CO_(20` that can diffuse through the diffusion membrane per unit ... . D. If both Assertion & Reason are false.

Which of the following features is predicted by the Nicolson–Singer fluid mosaic model of biological membranes? (A) Membrane lipids do not diffuse laterally (B) Membrane lipid is primarily in a monolayer form (C) Membrane lipids freely flip-flop (D) Membrane proteins may diffuse laterally

Description : Which of the following features is predicted by the Nicolson–Singer fluid mosaic model of biological membranes? (A) Membrane lipids do not diffuse laterally (B) Membrane lipid is primarily in a monolayer form (C) Membrane lipids freely flip-flop (D) Membrane proteins may diffuse laterally

Last Answer : Answer : D

During osmosis w) Pure solvent diffuses through a membrane but solutes do not. x) Pure solutes diffuse through a membrane but solvent does not. y) Pure solvent and a solution both diffuse at the same time through a membrane. z) Gases diffuse through a membrane into a solution and build up pressure.

Description : During osmosis w) Pure solvent diffuses through a membrane but solutes do not. x) Pure solutes diffuse through a membrane but solvent does not. y) Pure solvent and a solution both diffuse at the same time through a membrane. z) Gases diffuse through a membrane into a solution and build up pressure. 

Last Answer : ANSWER: W -- PURE SOLVENT DIFFUSES THROUGH A MEMBRANE BUT SOLUTES DO NOT. 

Why can oxygen diffuse across a cell membrane but a protein?

Description : Why can oxygen diffuse across a cell membrane but a protein?

Last Answer : Its too large

What types of molecules ccan diffuse through the ceel membrane without using a channel protein?

Description : What types of molecules ccan diffuse through the ceel membrane without using a channel protein?

Last Answer : Need answer

06. A hydrophilic medicinal agent has the following property: a) Low ability to penetrate through the cell membrane lipids b) Penetrate through membranes by means of endocytosis c) Easy permeation through the blood-brain barrier d) High reabsorption in renal tubules

Description : 06. A hydrophilic medicinal agent has the following property: a) Low ability to penetrate through the cell membrane lipids b) Penetrate through membranes by means of endocytosis c) Easy permeation through the blood-brain barrier d) High reabsorption in renal tubules

Last Answer : a) Low ability to penetrate through the cell membrane lipids

Why do cells need small molecules such as simple sugars and amino acids in order to diffuse into the cell?

Description : Why do cells need small molecules such as simple sugars and amino acids in order to diffuse into the cell?

Last Answer : Need answer

What is diffusion through a cell membrane? -Biology

Description : What is diffusion through a cell membrane? -Biology

Last Answer : answer:

Osmosis is the diffusion of what substance through a cell membrane? -Biology

Description : Osmosis is the diffusion of what substance through a cell membrane? -Biology

Last Answer : answer:

What is the major type of lipids found in the cell membrane?

Description : What is the major type of lipids found in the cell membrane?

Last Answer : Need answer

Lipids have the following properties: (A) Insoluble in water and soluble in fat solvent (B) High energy content (C) Structural component of cell membrane (D) All of these

Description : Lipids have the following properties: (A) Insoluble in water and soluble in fat solvent (B) High energy content (C) Structural component of cell membrane (D) All of these

Last Answer : Answer : D

Cell recognition and adhesion occur due to biochemicals of cell membrane named (a) Proteins (b) Lipids (c) Proteins and lipids (d) Glycoproteins and glycolipids

Description : Cell recognition and adhesion occur due to biochemicals of cell membrane named (a) Proteins (b) Lipids (c) Proteins and lipids (d) Glycoproteins and glycolipids

Last Answer : Ans:(d)

out of proteins; lipids and carbohydrates present in a cell membrane; what is true?

Description : out of proteins; lipids and carbohydrates present in a cell membrane; what is true?

Last Answer : Carbohydrates are minimum

Keeping in view the ‘fluid mosaic model’ for the structure of cell membrane, which one of the following statement is correct with respect to the movements of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?(a) While proteins can flip-flop, lipids can not (b) Neither lipids, nor proteins can flip-flop (c) Both lipids and proteins can flip-flop (d) While lipids can rarely flip-flop, proteins cannot.

Description : Keeping in view the fluid mosaic model' for the structure of cell membrane, which one of the following statement is correct with respect to the movements of lipids and proteins from one lipid ... ) Both lipids and proteins can flip-flop (d) While lipids can rarely flip-flop, proteins cannot.

Last Answer : (d) While lipids can rarely flip-flop, proteins cannot.

Vacuole in a plant cell (a) lacks membrane and contains air (b) lacks membrane and contains water and excretory substances (c) is membrane-bound and contains storage proteins and lipids (d) is membrane-bound and contains water and excretory substances.

Description : Vacuole in a plant cell (a) lacks membrane and contains air (b) lacks membrane and contains water and excretory substances (c) is membrane-bound and contains storage proteins and lipids (d) is membrane-bound and contains water and excretory substances.

Last Answer : (d) is membrane-bound and contains water and excretory substances.

Select the correct statement from the following regarding cell membrane. (a) Na+ and K+ ions move across cell membrane by passive transport. (b) Proteins make up 60 to 70% of the cell membrane. (c) Lipids are arranged in a bilayer with polar heads towards the inner part. (d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson

Description : Select the correct statement from the following regarding cell membrane. (a) Na+ and K+ ions move across cell membrane by passive transport. (b) Proteins make up 60 to 70% of the cell ... towards the inner part. (d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson

Last Answer : (d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.

Select the correct statement from the following regarding cell membrane (1) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson (2) Na+ and K+ ions move across cell membrane by passive transport (3) Proteins make up 60 to 70% of the cell membrane (4) Lipids are arranged in a bilayer with polar heads towards the inner part

Description : Select the correct statement from the following regarding cell membrane (1) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson (2) Na+ and K+ ions move across cell membrane by ... of the cell membrane (4) Lipids are arranged in a bilayer with polar heads towards the inner part

Last Answer : (1) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson

Fatty acids can be transported into and out of cell membrane by (A) Active transport (B) Facilitated transport (C) Diffusion (D) Osmosis

Description : Fatty acids can be transported into and out of cell membrane by (A) Active transport (B) Facilitated transport (C) Diffusion (D) Osmosis

Last Answer : B

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive (a) K+ into the cell (b) K+ and Na+ out of the cell (c) Na+ into the cell (d) Na+ out of the cell.

Description : In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive (a) K+ into the cell (b) K+ and Na+ out of the cell (c) Na+ into the cell (d) Na+ out of the cell.

Last Answer : c) Na+ into the cell

The process of diffusion of one liquid into the other through a semi permeable membrane is called (A) Viscosity (B) Osmosis (C) Surface tension (D) Cohesion

Description : The process of diffusion of one liquid into the other through a semi permeable membrane is called (A) Viscosity (B) Osmosis (C) Surface tension (D) Cohesion

Last Answer : Answer: Option B

How do diffusion and osmosis relate to the cell membrane?

Description : How do diffusion and osmosis relate to the cell membrane?

Last Answer : Need answer

The process by which cell can take in fluid and molecules too large to be carried across the plasma membrane by active transport is called a. phagocytosis b. Pinocytosis c. absorption d. diffusion

Description : The process by which cell can take in fluid and molecules too large to be carried across the plasma membrane by active transport is called a. phagocytosis b. Pinocytosis c. absorption d. diffusion

Last Answer : Pinocytosis

07. What is implied by «active transport»? a) Transport of drugs trough a membrane by means of diffusion b) Transport without energy consumption c) Engulf of drug by a cell membrane with a new vesicle formation

Description : 07. What is implied by «active transport»? a) Transport of drugs trough a membrane by means of diffusion b) Transport without energy consumption c) Engulf of drug by a cell membrane with a new vesicle formation

Last Answer : d) Transport against concentration gradient

3 Diffusion of drugs across cell membrane: A. Is dependent upon metabolic activity of the cell B. Is competitively inhibited by chemically related drugs C. Is affected by extent of ionization of drug molecules D. Exhibits saturation kinetics

Description : 3 Diffusion of drugs across cell membrane: A. Is dependent upon metabolic activity of the cell B. Is competitively inhibited by chemically related drugs C. Is affected by extent of ionization of drug molecules D. Exhibits saturation kinetics

Last Answer : C. Is affected by extent of ionization of drug molecules

Cholesterol is an example of (a) Membrane lipids (b) Triglycerides (c) Steroids (d) Adipose tissue

Description : Cholesterol is an example of (a) Membrane lipids (b) Triglycerides (c) Steroids (d) Adipose tissue

Last Answer : The correct answer is (c) Steroids. Cholesterol is a type of steroid, which is a specific class of lipids. It is an essential molecule found in animal cell membranes and is involved in various ... is a type of lipid, it is not classified as a membrane lipid, triglyceride, or adipose tissue.

Membrane lipids of chillsensitive plants contain - (1) low proportion of saturated fatty acids. (2) low proportion of unsaturated fatty acids. (3) equal proportion of saturated and unsaturated fatty acids. (4) high proportion of unsaturated fatty acids.

Description : Membrane lipids of chillsensitive plants contain - (1) low proportion of saturated fatty acids. (2) low proportion of unsaturated fatty acids. (3) equal proportion of saturated and unsaturated fatty acids. (4) high proportion of unsaturated fatty acids.

Last Answer : (4) high proportion of unsaturated fatty acids. Explanation: The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty ... increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.

.Plasma membrane is made of (a) proteins and carbohydrates (b) proteins and lipids (c) proteins, lipids and carbohydrates (d) proteins, some nucleic acid and lipids.

Description : .Plasma membrane is made of (a) proteins and carbohydrates (b) proteins and lipids (c) proteins, lipids and carbohydrates (d) proteins, some nucleic acid and lipids.

Last Answer : (c) proteins, lipids and carbohydrates

The phospholipids present in cytoplasm membrane of the archaeo- bacteria is A- phosphoglycerides B- polyisoprenoid C- polyisoprenoid branched chain lipids D- none of the bove

Description : The phospholipids present in cytoplasm membrane of the archaeo- bacteria is A- phosphoglycerides B- polyisoprenoid C- polyisoprenoid branched chain lipids D- none of the bove

Last Answer : polyisoprenoid branched chain lipids

″Proteins icebergs in a sea of lipids” is stated by (A) Lamellar Model (B) Unit-membrane Model (C) Fluid-Mosaic model (D) Micellar Model

Description : ″Proteins icebergs in a sea of lipids” is stated by (A) Lamellar Model (B) Unit-membrane Model (C) Fluid-Mosaic model (D) Micellar Model

Last Answer : (C) Fluid-Mosaic model

In a plasma membrane, which of the following provides a general barrier to the movement of molecules? a) lipids b) proteins c) carbohydrates d) all of these

Description : In a plasma membrane, which of the following provides a general barrier to the movement of molecules? a) lipids b) proteins c) carbohydrates d) all of these

Last Answer : ANSWER: A -- LIPIDS 

Membrane lipids of chillsensitive plants contain (1) low proportion of saturated fatty acids. (2) low proportion of unsaturated fatty acids. (3) equal proportion of saturated and unsaturated fatty acids. (4) high proportion of unsaturated fatty acids.

Description : Membrane lipids of chillsensitive plants contain (1) low proportion of saturated fatty acids. (2) low proportion of unsaturated fatty acids. (3) equal proportion of saturated and unsaturated fatty acids. (4) high proportion of unsaturated fatty acids.

Last Answer : high proportion of unsaturated fatty acids.

Omeprazole exerts practically no other action except inhibition of gastric acid secretion because: A. It transforms into the active cationic forms only in the acidic pH of the gastric juice B. Its active forms have selective affinity for the H+K+ATPase located in the apical canaliculi of gastric parietal cells C. Its cationic forms are unable to diffuse out from the gastric parietal cell canaliculi D. All of the above

Description : Omeprazole exerts practically no other action except inhibition of gastric acid secretion because: A. It transforms into the active cationic forms only in the acidic pH of the gastric juice B. Its ... forms are unable to diffuse out from the gastric parietal cell canaliculi D. All of the above

Last Answer : D. All of the above

In which cell will the molecules diffuse in?

Description : In which cell will the molecules diffuse in?

Last Answer : Need answer

What is able to diffuse through the stomata?

Description : What is able to diffuse through the stomata?

Last Answer : Need answer

There are three commonly detectable points of zero polarization of diffuse sky radiation, neutral points, lying along the vertical circle through the sun. Which of the following is NOT one of these points? Is it the: w) Arago Point x) Babinet Point y) Brewster Point z) Longfellow Point

Description : There are three commonly detectable points of zero polarization of diffuse sky radiation, neutral points, lying along the vertical circle through the sun. Which of the following is NOT one of these points? Is it the: w) Arago Point x) Babinet Point y) Brewster Point z) Longfellow Point

Last Answer : ANSWER: Z -- LONGFELLOW POINT

What is diffusion across a biological membrane? -Biology

Description : What is diffusion across a biological membrane? -Biology

Last Answer : answer:

$ Positive diffusion occurs against the concentration gradients. ! Osmosis does not require a semi-permeable membrane.

Description : $ Positive diffusion occurs against the concentration gradients. ! Osmosis does not require a semi-permeable membrane.

Last Answer : $ Positive diffusion occurs against the concentration gradients. ! Osmosis does not require a semi-permeable ... D. If both As and R are wrong.

The diffusion membrane is made up of: (A) Thick columnar epithelium of alveoli (B) Endothelium of alveolar capillaries (C) Basement substances in betw

Description : The diffusion membrane is made up of: (A) Thick columnar epithelium of alveoli (B) Endothelium of alveolar capillaries (C) Basement substances in betw

Last Answer : The diffusion membrane is made up of: (A) Thick columnar epithelium of alveoli (B) ... (C) Basement substances in between capillaries and alveoli

The diffusion membrane is made up of: (A) Thick columnar epithelium of alveoli (B) Endothelium of alveolar capillaries (C) Basement substances in betw

Description : The diffusion membrane is made up of: (A) Thick columnar epithelium of alveoli (B) Endothelium of alveolar capillaries (C) Basement substances in betw

Last Answer : The diffusion membrane is made up of: (A) Thick columnar epithelium of alveoli (B) ... (C) Basement substances in between capillaries and alveoli

When do the particles stop moving across the membrane in diffusion?

Description : When do the particles stop moving across the membrane in diffusion?

Last Answer : Particles in a given medium stop moving across the membraneduring diffusion when a state of equilibrium is reached, that iswhen the number of particles on either side of the membraneequalizes.

All the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains (B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phopholipids (D) Rotation of phospholipids around their long axes

Description : All the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains (B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phopholipids (D) Rotation of phospholipids around their long axes

Last Answer : C

In the passive diffusion, solute molecules cross the membrane as a result of A- concentration difference B- pressure difference C- ionic difference D- all of these

Description : In the passive diffusion, solute molecules cross the membrane as a result of A- concentration difference B- pressure difference C- ionic difference D- all of these

Last Answer : concentration difference

All the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains (B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phospholipids (D) Rotation of phospholipids around their long axes

Description : All the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains (B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phospholipids (D) Rotation of phospholipids around their long axes

Last Answer : (C) Transbilayer diffusion of phospholipids

Substances insoluble in a membrane are carried across the membrane with the concentration gradient by means of a carrier molecule in a process known as: a) osmosis. b) diffusion. c) active transport. d) facilitated diffusion.

Description : Substances insoluble in a membrane are carried across the membrane with the concentration gradient by means of a carrier molecule in a process known as: a) osmosis. b) diffusion. c) active transport. d) facilitated diffusion.

Last Answer : ANSWER: D -- FACILITATED DIFFUSION.

Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` transport chloride ions diffuse from plasma into t

Description : Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` transport chloride ions diffuse from plasma into t

Last Answer : Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` ... D. If both Assertion & Reason are false.

At the tissue site where partial pressure of `CO_(2)` is (a)____ due to (b)____, `CO_(2)` diffuse into blood and form (c)_____ and (d)__

Description : At the tissue site where partial pressure of `CO_(2)` is (a)____ due to (b)____, `CO_(2)` diffuse into blood and form (c)_____ and (d)__

Last Answer : At the tissue site where partial pressure of `CO_(2)` is (a)____ due to (b)____, `CO_(2)` diffuse into blood and form (c)_____ and (d)__

At the tissue site where partial pressure of `CO_(2)` is (a)____ due to (b)____, `CO_(2)` diffuse into blood and form (c)_____ and (d)__

Description : At the tissue site where partial pressure of `CO_(2)` is (a)____ due to (b)____, `CO_(2)` diffuse into blood and form (c)_____ and (d)__

Last Answer : At the tissue site where partial pressure of `CO_(2)` is (a)____ due to (b)____, `CO_(2)` diffuse into blood and form (c)_____ and (d)__

Can starch diffuse into the human blood stream without being digested?

Description : Can starch diffuse into the human blood stream without being digested?

Last Answer : What is the answer ?