Which Observation Can Be Used as Evidence That the Cell

question 57

Multiple Choice

Which observation can be used as evidence that the cell membrane has a fluid nature?

• A) In the laboratory, two cells from different species can be fused together to make one large cell.
• B) Images obtained using freeze-fracture electron microscopy reveal that the membrane contains embedded proteins.
• C) Chemical analysis reveals that cell membranes contain phospholipids, proteins, and cholesterol as major components.
• D) Analysis of the amino acids present in protein regions embedded in cell membranes show that they mainly have hydrophobic side chains.
• E) The cholesterol content in cell membranes varies depending on cell type, and it is generally higher than in organelle membranes.

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Definitions:

Frontal Lobes

The areas of the brain located behind the forehead that are responsible for complex cognitive functions, including emotional regulation, problem solving, and planning.

Motor Cortex

The area of the brain responsible for the planning, control, and execution of voluntary movements.

Postcentral Gyrus

The region in the parietal lobe of the brain where the primary somatosensory cortex is located, responsible for processing tactile information.

Broca's Area

Broca's area is a region in the frontal lobe of the dominant hemisphere (usually the left) of the brain with functions linked to speech production.