This document appears to be an exam for a chemistry course assessing students' knowledge of key concepts. It contains 6 questions testing understanding of water properties, differences between living and non-living things, definitions of amino acids and proteins with examples, classification of amino acids, and explanation of glycine ionization during titration with NaOH starting at pH=1.0. Students are instructed to answer the questions in pen on a scratch paper. The exam is worth a total of 4 points.

1. Prof. Lorrana
Curso:
Técnico em Química
Período: 2º Data:22/08/2014
Aluno:
Vale: 4,0 Nota:______
Avaliação nº01(N1)
Instruções para a realização da prova: Responder as questões à caneta na folha de rascunho.
01) Cite quatro propriedades físico-químicas da água e explique a sua importância nos
sistemas bioquímicos. (1,0 ponto)
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02) Quais são as principais características que diferem os seres vivos dos seres não
vivos. Explique. (0,5 ponto)
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03) Defina o que são aminoácidos e proteínas e cite exemplos. (0,5 ponto)
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04) Considerando a classificação dos aminoácidos de acordo com a natureza do grupo
da cadeia lateral, identifique quais os aminoácidos a seguir são apolares ou polares
ácidos, básicos ou neutros. (1,0 ponto)
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Ácido aspártico Alanina Histidina
Alanina

2. 06) A glicina apresenta três formas de ionização, mostradas na figura abaixo. Explique
como ocorre o processo de titulação deste aminoácido com o NaOH, a partir do
pH=1,0. (1,0 ponto)
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