Topic: Proteins - occurrence and role in the body

Target group

Elementary school student (grades 7. and 8.)

Core curriculum:

Elementary school. Chemistry.

X. Chemical substances of biological importance. Pupil:

5) lists elements whose atoms are part of protein molecules; defines proteins as compounds arising as a result of condensation of amino acids.

General aim of education

The student discusses the occurrence of proteins and their role in the body.

Key competences

• communication in the mother tongue;

• communication in foreign languages;

• digital competence;

• learning to learn.

Criteria for success
The student will learn:

• to identify food products that are the source of proteins;

• to discuss the role of proteins in the body.

Methods/techniques

• expository

  • talk.

• activating

  • discussion.

• programmed

  • with computer.

• practical

  • exercices concerned.

Forms of work

• individual activity;

• activity in pairs;

• activity in groups;

• collective activity.

Teaching aids

• e‑textbook;

• interactive whiteboard, tablets/computers;

• sheets of gray paper;

• colored markers.

Lesson plan overview

Introduction

1. The teacher hands out Methodology Guide or green, yellow and red sheets of paper to the students to be used during the work based on a traffic light technique. He presents the aims of the lesson in the student's language on a multimedia presentation and discusses the criteria of success (aims of the lesson and success criteria can be send to students via e‑mail or posted on Facebook, so that students will be able to manage their portfolio).

2. The teacher together with the students determines the topic – based on the previously presented lesson aims – and then writes it on the interactive whiteboard/blackboard. Students write the topic in the notebook.

Realization

1. The teacher, referring to the previous lesson, asks students to define the concept of proteins. He asks what is the smallest taxonomic unit in the construction of these compounds, what are called long‑chain bonds from which elements are built.

2. The teacher divides the class into groups. It distributes sheets of paper and colored markers. The students' task is to develop an infographics on the occurrence of proteins in food products. Students can use the abstract, internet and textbooks. After finishing the work, the leaders present and discuss the effects of the group's activities. The teacher summarizes the students' work.

3. Students working in pairs, based on available sources, develop answers to the questions contained in the form in the abstract.

4. After the task is completed, the discussion begins. The teacher displays on the multimedia board a diagram showing the functions of proteins in the body and summarizes the collected knowledge.

5. The students carry out an interactive exercise. The teacher and the students discuss the correct solution.

Summary

1. The teacher asks a willing student to summarize the lesson from his point of view. He asks other students if they would like to add anything to their colleague's statements.

Homework

1. Listen to the abstract recording at home. Pay attention to pronunciation, accent and intonation. Learn to pronounce the words learned during the lesson.

The following terms and recordings will be used during this lesson

Terms

Texts and recordings

Proteins - occurrence and role in the body

Proteins are the basic element building all organisms. A man has to provide the protein in his diet. These proteins in the digestion process are divided into smaller fragments, which produce new proteins necessary for the body.

Where proteins are found?

The protein content in food products is different, which should be taken into consideration when selecting products consumed during the day. The daily requirement for protein is an individual feature of the body – depends on age and gender.

Proteins act as building blocks (build muscle, nails, hair and tissues). Their digestion takes place with the participation of protein enzymes. Protein is the main component of hemoglobin in the blood. Hemoglobin is responsible for supplying oxygen to cells.

• The molecules of all proteins are mainly composed of atoms of four elements: carbon, hydrogen, oxygen and nitrogen. Some of the proteins may include sulfur atoms, phosphorus and other elements.

• The basic elements building proteins are amino acids.

• Proteins are macromolecular chemical compounds, made up of amino acid residues joined by peptide bonds.

• Proteins are the main building blocks of organisms. They perform functions: building, transport, regulating and others.

• The source of animal protein include eggs, dairy, meat, fish, and vegetable – cereals and legumes, such as beans, soy and lentils.