Cell Cycle and Biomolecules Benchmark Review

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What is cell differentiation?

Back

Cell differentiation is the process by which a less specialized cell becomes a more specialized cell type, leading to the formation of different cell types in an organism.

Front

How do different cell types in an organism arise from the same DNA?

Back

Different cell types arise from the same DNA because they express different genes, leading to specialization.

Front

What role does gene expression play in cell differentiation?

Back

Gene expression determines which proteins are produced in a cell, influencing its structure and function, and thus leading to differentiation.

Front

What is the significance of phospholipids in cell membranes?

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Phospholipids are essential components of cell membranes, forming a bilayer that provides structure and regulates the movement of substances in and out of the cell.

Front

What are the building blocks of phospholipids?

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Phospholipids are composed of a glycerol backbone, two fatty acid tails, and a phosphate group.

Front

How does the structure of phospholipids relate to their function in membranes?

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The hydrophilic (water-attracting) phosphate head and hydrophobic (water-repelling) fatty acid tails allow phospholipids to form a bilayer, creating a barrier that separates the inside of the cell from the outside environment.

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What is the relationship between gene expression and the function of nerve and muscle cells?

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Nerve and muscle cells have the same DNA, but different genes are expressed in each type, leading to their distinct functions.

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What is the role of transcription factors in gene expression?

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Transcription factors are proteins that help regulate the transcription of specific genes by binding to nearby DNA.

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What is the difference between a gene and an allele?

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A gene is a segment of DNA that codes for a protein, while an allele is a variant form of a gene that can result in different traits.

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How do environmental factors influence gene expression?

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Environmental factors such as temperature, nutrients, and stress can affect gene expression by activating or repressing specific genes.