Question

substances can react with a cells dna.
uvb waves can also be directly absorbed
by a cells dna. both of these processes
change the dnas structure, damaging the
skin cell.

damaged skin cells send signals to other
body cells to trigger dna repair. additional blood cells are sent to the dermis,
causing skin redness. this redness is commonly known as a sunburn. the damaged
skin cells may be repaired, or they may die and peel off the skins surface. damaged
skin cells that do not die or get repaired can develop into skin cancer.

order the following events to describe how a sunburn occurs.

first

blood cells are sent to the middle layer of skin.
skin cells with damaged dna send signals to other body
cells.
chromophores absorb uva waves and produce highly
reactive substances.
highly reactive substances react with a dna molecule.

Explanation:

The text describes the process of sunburn formation. First, chromophores absorb UVA waves and produce reactive substances. Then, these substances react with DNA. After that, damaged skin cells send signals. Finally, blood cells are sent to the dermis.

Answer:

1. Chromophores absorb UVA waves and produce highly reactive substances.
2. Highly reactive substances react with a DNA molecule.
3. Skin cells with damaged DNA send signals to other body cells.
4. Blood cells are sent to the middle layer of skin.