Science Single Award - 4SS0 PearsonEdexcel

Biological Molecules

Akopọ

Your body is a chemical factory. Every second, thousands of reactions build new molecules, break others apart, and release the energy that keeps you alive. The raw materials for all of this come from just three families of large biological molecule: carbohydrates, proteins, and lipids.

In this lesson you will learn what these molecules are made of, how to test for them in the laboratory, and how enzymes - the protein catalysts that run almost every reaction in your body - are affected by temperature and pH.

Awọn Afojusun

  1. Identify the chemical elements present in carbohydrates, proteins and lipids (fats and oils)
  2. Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units: starch and glycogen from simple sugars, protein from amino acids, and lipid from fatty acids and glycerol
  3. Investigate food samples for the presence of glucose, starch, protein and fat
  4. Understand the role of enzymes as biological catalysts in metabolic reactions
  5. Understand how temperature changes can affect enzyme function, including changes to the shape of active site
  6. Investigate how enzyme activity can be affected by changes in temperature
  7. Understand how enzyme function can be affected by changes in pH altering the active site

Akọ̀wé Ẹ̀kọ́

A single cell contains thousands of different molecules, but the large ones fall into three main groups: carbohydrates, proteins, and lipids. Each group is built from small repeating units linked together, and each plays a distinct role in keeping organisms alive. Understanding their structure, testing for them, and knowing how the enzymes that process them work is central to Edexcel biology.

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Ìdánwò Ẹ̀kọ́

Oriire fun ipari ẹkọ lori Biological Molecules. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.

Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.

Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.

  1. Which elements are found in proteins but NOT in carbohydrates? A) Carbon and hydrogen B) Nitrogen and sulfur C) Oxygen and hydrogen D) Carbon and oxygen Answer: B
  2. What is the positive result when Benedict's solution is added to glucose and heated? A) Blue to purple B) Brown-yellow to blue-black C) Blue to orange/brick-red D) Blue to green only Answer: C
  3. Enzymes are described as biological catalysts. What does 'catalyst' mean? A) A substance that is used up during a reaction B) A substance that slows down a chemical reaction C) A substance that speeds up a reaction without being used up D) A substance that provides energy for a reaction Answer: C
  4. What happens to an enzyme at temperatures much higher than its optimum? A) It works faster B) It becomes denatured C) It dissolves D) It changes into a different enzyme Answer: B
  5. Lipids are made from which basic units? A) Amino acids B) Simple sugars C) Fatty acids and glycerol D) Nucleotides Answer: C

O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
Oluranlọwọ ẹkọ ti AI ṣe agbara rẹ
Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
O wa lori Android, Windows, macOS, ati Linux

O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
Oluranlọwọ ẹkọ ti AI ṣe agbara rẹ
Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
O wa lori Android, Windows, macOS, ati Linux

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Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Biological Molecules? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.

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