Science Single Award - 4SS0 PearsonEdexcel

Biological Molecules

Bayani Gaba-gaba

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.

Manufura

  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

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An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.

Bude taswirar tunani a cikin manhaja

Katunan tunawa

Gwaji mai sauri kan abin da ake jarraba a wannan batu.

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Takardar Darasi

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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Nazarin Darasi

Barka da kammala darasi akan Biological Molecules. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

  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

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Kana son yin aikin tambayoyin gwaji kan Biological Molecules? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.

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