<span>
DNA reactive chemicals are mutagenic compounds that can make direct interactions with DNA and thus make a change in base sequence of DNA. For example, deaminating agents, such as nitrous acid can cause transition mutations by converting cytosine to uracil.</span>
Also, base analogs can substitute for DNA bases during replication and cause transition mutations.
Answer:
diagram is weird and unrealistic but B is the only reasonable answer.
Explanation:
B only makes sense - everything else is unreasonable. Proteins don't become enzymes since enzymes are already proteins, there are no proteins, carbohydrates, or glucose molecules in the image.
Excited electrons are those which temporarily occupy a state higher than their ground state
The electron is excited if it is given extra energy, such as when a photon, or packet of light, absorbs it or if it collides with an atom.
D. Life Cycle.
Think about it this way....
You start out as an infant, you grow older and olde each year and eventually you die. Your souls then goes on into another body and starts the cycle over..
the third statement is wrong. Parenchymal cells have thin walls and the nuclei are not visible.
