Chọn câu đúng 1. Phản ứng Biuret dương tính cho tất cả các acid amin 2. Acid amin serin có chứa nhóm – SH 3. Glutathiol chứa acid glutamic, glycin, histidin 4. Các tripeptide, protein luôn cho phản ứng Biuret dương tính

What would be the mass of an atom with 8 protons and 8 neutrons? a) 16 amu b) 8 amu c) 64 amu

Which of the following phrases is an example of positive language from this speech? a. “battered by storms” b. “deeply rooted in the american dream” c. “wallow in the valley of despair” d. “veterans of creative suffering”

Environmental responsibility belongs to every citizen. write a short paragraph describing an action you could take to be more environmentally responsible.