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← Life Sciences & MedicineWhich outcome occurs when a signaling molecule initiates stem cell differentiation?
A)Telomere length remains unchanged.
B)Gene expression patterns are altered.✓
C)Metabolic rate temporarily decreases.
D)Cell cycle checkpoints are bypassed.
💡 Explanation
Differentiation involves changes in gene expression, because signaling molecules activate transcription factors that regulate the expression of specific genes. Therefore, altered gene expression patterns are observed, rather than unchanged telomere length, reduced metabolic rate, or bypassed cell cycle checkpoints.
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