What is meant by selective toxicity? what is meant by selective toxicity?

1. chemotherapeutic agents should work on many different targets on a pathogen.
2. chemotherapeutic agents should work on certain types of pathogens.
3. chemotherapeutic agents should have only one mode of action.
4. chemotherapeutic agents should act against the pathogen and not the host. submitrequest answer

4. agents should act against the pathogen and not the host.

Explanation:

A chemotherapeutic chemical should exhibit selective toxicity. This chemical should target the specific chemicals or the processes exhibited by the pathogen only so that the host cells are not adversely affected. This is called selective toxicity. To exhibit selective toxicity, drugs are designed in such a way that the pathogen-specific vital pathways and molecules are affected.

For example, human cells lack peptidoglycan which in turn is a major constituent of bacterial cell walls. Therefore, a drug with selective toxicity can target the synthesis and/ or stability of peptidoglycan.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.