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Select odd one out
substances dissolved in it
- a)Membranes are made of organic molecules such as proteins and lipids
- b)The movement of water across a semipermeable membrane is affected by the amount of
- c)Molecules soluble in organic solvents can easily pass through the membrane
- d)Plasma membrane contain chitin sugar in plants
Correct answer is option 'D'. Can you explain this answer?
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Select odd one outsubstances dissolved in ita)Membranes are made of o...
Each cell is bounded by an extremely delicate, thin elastic living membrane, called the plasma membrane. The plasma membrane is made up of two layers of lipid (fat) molecules with protein molecules which is sandwitched between the lipid layer. The structure of plasma membrane can be observed under an electron microscope only. It is a selectively permeable membrane which allows the flow of only some substances into the cell and out of the cell. Viruses do not have any membranes.
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Select odd one outsubstances dissolved in ita)Membranes are made of o...
The odd one out in this list is option D, which states that plasma membranes contain chitin sugar in plants. This statement is incorrect because chitin is not a sugar found in plants, but rather a structural polysaccharide that is primarily found in the exoskeletons of arthropods, such as insects and crustaceans, and the cell walls of fungi.
Let's analyze each option in detail to understand why option D is the odd one out:
a) Membranes are made of organic molecules such as proteins and lipids:
- This statement is correct. Membranes, including plasma membranes, are composed of organic molecules such as proteins and lipids. These molecules form a bilayer structure that acts as a barrier, controlling the movement of substances in and out of the cell.
b) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it:
- This statement is correct. The movement of water across a semipermeable membrane, such as the plasma membrane, is influenced by the concentration of solutes dissolved in the water. This process is known as osmosis, where water moves from an area of lower solute concentration to an area of higher solute concentration.
c) Molecules soluble in organic solvents can easily pass through the membrane:
- This statement is correct. The plasma membrane is selectively permeable, meaning it allows certain substances to pass through while restricting others. Small, nonpolar molecules, such as those soluble in organic solvents like oil, can easily diffuse through the lipid bilayer of the membrane.
d) Plasma membrane contains chitin sugar in plants:
- This statement is incorrect. Chitin is not a sugar found in plants. Instead, plants primarily utilize cellulose, a polysaccharide made up of glucose units, as a structural component in their cell walls. Chitin is more commonly found in the cell walls of fungi and the exoskeletons of arthropods.
In conclusion, option D is the odd one out because it incorrectly states that plasma membranes contain chitin sugar in plants, which is not true.
Let's analyze each option in detail to understand why option D is the odd one out:
a) Membranes are made of organic molecules such as proteins and lipids:
- This statement is correct. Membranes, including plasma membranes, are composed of organic molecules such as proteins and lipids. These molecules form a bilayer structure that acts as a barrier, controlling the movement of substances in and out of the cell.
b) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it:
- This statement is correct. The movement of water across a semipermeable membrane, such as the plasma membrane, is influenced by the concentration of solutes dissolved in the water. This process is known as osmosis, where water moves from an area of lower solute concentration to an area of higher solute concentration.
c) Molecules soluble in organic solvents can easily pass through the membrane:
- This statement is correct. The plasma membrane is selectively permeable, meaning it allows certain substances to pass through while restricting others. Small, nonpolar molecules, such as those soluble in organic solvents like oil, can easily diffuse through the lipid bilayer of the membrane.
d) Plasma membrane contains chitin sugar in plants:
- This statement is incorrect. Chitin is not a sugar found in plants. Instead, plants primarily utilize cellulose, a polysaccharide made up of glucose units, as a structural component in their cell walls. Chitin is more commonly found in the cell walls of fungi and the exoskeletons of arthropods.
In conclusion, option D is the odd one out because it incorrectly states that plasma membranes contain chitin sugar in plants, which is not true.
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Select odd one outsubstances dissolved in ita)Membranes are made of organic molecules such as proteins and lipidsb)The movement of water across a semipermeable membrane is affected by the amount ofc)Molecules soluble in organic solvents can easily pass through the membraned)Plasma membrane contain chitin sugar in plantsCorrect answer is option 'D'. Can you explain this answer?
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