Often asked: Which Of The Following Is Least Likely To Be Important In Holding The Components Of A Biological?

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Which of the following is least likely to be important in holding the components of a biological membrane together? Covalent interactions between the phospholipid and protein components of the membrane

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Which of the following is the most important component in biological membranes?

Lipid molecules are the only essential components of biological membranes. The chemical structure of Vitamin D is closely related to cholesterol. Sphingolipids are significant components of biological membranes.

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Which of the following types of molecules are least likely to diffuse through the phospholipid bilayer of a cell membrane?

Small uncharged polar molecules, such as H2O, also can diffuse through membranes, but larger uncharged polar molecules, such as glucose, cannot. Charged molecules, such as ions, are unable to diffuse through a phospholipid bilayer regardless of size; even H+ ions cannot cross a lipid bilayer by free diffusion.

Which of the following factors will help determine the permeability of a membrane to a given substance?

-The lipid bilayer will be impermeable or very poorly permeable to polar or charged solutes. The presence of the correct transport protein will determine the permeability.

Which of the following could cross a membrane without the help of a protein?

Nonpolar molecules can pass through the plasma membrane with relative ease. Even larger nonpolar molecules, such as steroid hormones, can pass through the plasma membrane easily. Passing through the membrane without the need for assisting proteins is known as passive diffusion.

Which one of the following is least likely to cross a lipid bilayer?

6. Which of the following is least likely to cross a cellular membrane by simple diffusion? ANSWER: B, POTASSIUM IONS ARE CHARGED AND DO NOT PASS AS READILY THROUGH THE LIPID BYLAYER AS DO NON-POLAR GASSES AND LIPIDS.

What are the important parts of a biological membrane?

The main components of biological membranes are proteins, lipids, and carbohydrates in variable proportions. Carbohydrates account for less than 10% of the mass of most membranes and are generally bound either to the lipid or protein components. Myelin has few functions and is made up almost entirely of lipids.

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What 3 molecules Cannot easily pass through the membrane?

The plasma membrane is selectively permeable; hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot.

Which of the following would likely diffuse through the lipid bilayer most rapidly?

In general, which of the following will diffuse across a lipid bilayer most rapidly? Sodium ions, oxygen (O2), and glucose pass directly through lipid bilayers at dramatically different rates.

Which of the following would be most likely to enter a cell by diffusion directly through the phospholipid bilayer?

endocytosis. Which of the following would be most likely to enter a cell by diffusion directly through the phospholipid bilayer? Steroid hormone.

What 3 factors affect the permeability of cell membranes?

The permeability of a membrane is affected by temperature, the types of solutes present and the level of cell hydration.

Which of the following factor does not affect permeability?

Various properties of water or fluid such as unit weight and viscosity also effects the permeability. However, unit weight of water will not affect much since it does not change much with temperature.

What factors contribute to permeability?

The factors that affect the coefficient of permeability for a given soil are particle size distribu- tion (grading curve), void ratio, level of saturation, soil structure, and soil imperfections or discontinu- ities [1, 2, 3, 4]. The coefficient of permeability increases significantly with increase in the void ratio.

Which molecules can cross the membrane without assistance?

Small or Nonpolar Oxygen is a small molecule and it’s nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.

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Which of the following can pass through the phospholipid bilayer without assistance?

Oxygen can cross the phospholipid bilayer of the membrane through the process of simple diffusion. Since the oxygen molecule’s size is small and non-polar, they quickly pass through the phospholipid bilayer without the help of transport proteins.

Which of the following Cannot easily pass through a cell membrane?

Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.

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