Question

Changes in epigenetic modifications alter the accessibility and transcription of DNA. Describe how environmental stimuli, such as ultraviolet light exposure, could modify gene expression.

a) UV light increases DNA replication
b) UV light decreases histone acetylation
c) UV light induces DNA methylation
d) UV light disrupts mRNA translation

Answer 1

UV light exposure can modify gene expression through changes in epigenetic modifications, such as DNA methylation and deacetylation.

Step-by-step explanation:

Environmental stimuli, such as ultraviolet (UV) light exposure, can modify gene expression through changes in epigenetic modifications. UV light can cause DNA methylation and deacetylation of genes, leading to alterations in gene accessibility and transcription. These changes can result in the activation or suppression of specific genes, ultimately influencing protein production and cellular responses to the environment.