Tryptophan
Hopkins-Cole test is for tryptophan in proteins.
Tryptophan
You must have at least two, those that will form the peptide linkage (NH2 and COOH) since Biuret test is for detecting peptide linkages.
It depends.* Being a "responsible person" is usually considered a positive trait. * On the other hand, if you are (for example) the person "responsible" for breaking the window, that's not a good thing.
Chemical products are indispensable for a modern society.
positive catalyst
Clostridium
You must have at least two, those that will form the peptide linkage (NH2 and COOH) since Biuret test is for detecting peptide linkages.
positive
Chemical has a neutral connotation.
It depends.* Being a "responsible person" is usually considered a positive trait. * On the other hand, if you are (for example) the person "responsible" for breaking the window, that's not a good thing.
It's positive because it means you're responding.
The title " Chairwoman " indicates a position of leadership of an organized grouping. Thus it can be thought of as a very positive compliment.
Chemical products are indispensable for a modern society.
steptococcus pneumonae
Yes, the centre of a chemical atom is a positive nucleus.
The electron is responsible for the negative charge while the proton in responsible for the positive charge.
positive catalyst
This question is incomplete. A positive side could mean the positive side of a situation. A positive side could mean the side that is correct or apart of a chemical equation.