What is the function of Structure E?

Question

The cell membrane. Each letter marks a definite structure of the membrane. Letter A marks the structure represented by a branched sequence on the integral protein. B marks a branched structure on the cell membrane. C marks a large elongated structure outside the cell. D marks part of the membrane, which consists of two rows of molecules. Each molecule has a head and a tail. E marks a molecule, which is one of the membrane components. Such molecules are randomly integrated in the membrane. F marks a structure that penetrates two layers of the membrane.

structural support of the cell
cell-cell communication
detection of environmental change
transport across the plasma membrane
stabilization of the phospholipids
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Part B
Identify Structure D.
The cell membrane. Each letter marks a definite structure of the membrane. Letter A marks the structure represented by a branched sequence on the integral protein. B marks a branched structure on the cell membrane. C marks a large elongated structure outside the cell. D marks part of the membrane, which consists of two rows of molecules. Each molecule has a head and a tail. E marks a molecule, which is one of the membrane components. Such molecules are randomly integrated in the membrane. F marks a structure that penetrates two layers of the membrane.

glycoprotein
phospholipid bilayer of membrane
protein
cholesterol
extracellular matrix
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Part C
Identify Structure A.
The cell membrane. Each letter marks a definite structure of the membrane. Letter A marks the structure represented by a branched sequence on the integral protein. B marks a branched structure on the cell membrane. C marks a large elongated structure outside the cell. D marks part of the membrane, which consists of two rows of molecules. Each molecule has a head and a tail. E marks a molecule, which is one of the membrane components. Such molecules are randomly integrated in the membrane. F marks a structure that penetrates two layers of the membrane.

glycoprotein
cholesterol
protein
phospholipid
extracellular matrix

Answer 1

Part A: Function of Structure E

Structure E represents a molecule that is one of the components of the membrane and is randomly integrated within it. Based on the function of various membrane components, particularly those that are integrated into the membrane, the most appropriate function associated with Structure E would be transport across the plasma membrane. Membrane proteins and other components play crucial roles in facilitating the movement of substances across the cell membrane.

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Part B: Identify Structure D

Structure D is described as part of the membrane that consists of two rows of molecules, each having a head and a tail. This description fits the structure of the phospholipid bilayer of the membrane. Each phospholipid molecule has a hydrophilic (water-attracting) head and two hydrophobic (water-repellent) tails, arranged in a bilayer fashion.

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Part C: Identify Structure A

Structure A is described as a branched sequence on the integral protein. The branched sequences on integral proteins are typically made up of carbohydrates and indicate that the structure is a type of molecule involved in cell recognition and communication. Thus, Structure A can be identified as a glycoprotein, which is a protein that has carbohydrate groups attached to it.

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In summary:

• Part A: Function of Structure E - transport across the plasma membrane.
• Part B: Identify Structure D - phospholipid bilayer of membrane.
• Part C: Identify Structure A - glycoprotein.