Evolution Quote by Siddhartha Mukherjee
““In the late 1970s, scientists working on gene-silencing discovered that the attachment of a small molecule-a methyl group-to DNA was correlated with a gene's turning off. These methyl tags decorated the strands of DNA, like charms on a necklace, and they were recognized as shutdown signals. The production of RNA ceased and the expression of the gene was silenced. If a chromosome was heavily decorated by methyl tags, then perhaps the whole chromosome could be silenced.””
About This Quote
Source Book: The Emperor of All Maladies by Siddhartha Mukherjee, 2010
DNA methylation adds chemical tags that silence genes, allowing cells to turn off whole regions of the genome.
In simple terms: Methyl tags switch genes off.
Key Takeaway
Recognize epigenetic control in health and disease.
Themes
biology
genetics
epigenetics
medicine
research
Mood
curious
thoughtful
Type
scientific
educational
When to use this quote
- cancer therapy
- developmental biology
- environmental exposure
- personalized medicine
Key Concepts
DNA methylation
gene silencing
chromatin regulation
Questions to Reflect On
- How can we target methylation therapeutically?
- What environmental factors influence epigenetic marks?
A Different Perspective
Epigenetic changes can be reversible, limiting permanent control.
![“Perhaps no order of mammals presents us with so extraordinary a series of gradations as this [step by step, from humans to apes to monkeys to lemurs] - leading us insensibly from the crown and summit of the animal creation down to creatures, from which there is but a step, as it seems, to the…” quote by Thomas Huxley](https://sms4smile.com/quotes/img-quotes/f0b/thomas-huxley-1183_animal_perhaps-no-order-of-mammals-presents-us_3051.jpg)
