Question

define the follwing---

1.) catalytic poison

2.) positive catalyst

3.) negative catalyst

4.) promoter

Answer 1

1. Catalytic poison, substance that reduce the effectiveness of a catalyst in chemical reaction.
2. Positive catalyst increase the rate of reaction by lowering the energy of activation.
3. Negative catalyst is a substance that decreases the rate of chemical reaction.
4. A promoter is a region of DNA that initiates transcription of a particular gene.

Answer 2

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• Catalyst poisoning refers to the partial or total deactivation of a catalyst by a chemical compound. 
• A catalyst which decreases or retards the rate of reaction is called negative catalyst.
• A catalyst which decreases or retards the rate of reaction is called negative catalyst.
• A promoter is a sequence of DNA needed to turn a gene on or off.