Biology As - Biological Molecules

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Quizzes Created: 1 | Total Attempts: 462
Questions: 8 | Attempts: 462

Biology As - Biological Molecules - Quiz

Test on Part 1 of AQA AS Biology.

Questions and Answers
  • 1. 

    What are the six main Chemical groups of nutrients needed in the Human Body?

    Carbohydrates, proteins, lipids, vitamins and minerals, nucleic acids, and water are the six main chemical groups of nutrients needed in the human body. These nutrients play essential roles in maintaining overall health and functioning of the body. Carbohydrates provide energy, proteins are important for growth and repair of tissues, lipids are necessary for insulation and protection of organs, vitamins and minerals are required for various metabolic processes, nucleic acids are essential for genetic material and protein synthesis, and water is crucial for hydration and transportation of nutrients.

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  • 2. 

    What is Metabolism?

    Metabolism refers to the collective set of chemical reactions that occur within an organism. These reactions are responsible for various processes such as breaking down food for energy, synthesizing molecules, and eliminating waste products. Metabolism is vital for maintaining the overall functioning and survival of an organism.

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  • 3. 

    Reactions breaking larger molecules into smaller ones are known as ....

    Catabolic reactions refer to the process of breaking down larger molecules into smaller ones. These reactions release energy by breaking chemical bonds, allowing the body to obtain energy from the stored molecules. Catabolic reactions are essential for various metabolic processes, such as digestion and cellular respiration. They play a crucial role in providing the necessary building blocks and energy for an organism's growth, repair, and maintenance.

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  • 4. 

    What is an example of this reaction?

    Digestion is an example of a reaction that occurs in the body. It involves the breakdown of food into smaller molecules that can be absorbed and used by the body. During digestion, enzymes and acids in the stomach and intestines break down proteins, carbohydrates, and fats into their respective building blocks. This process allows the nutrients to be absorbed into the bloodstream and used for energy, growth, and repair. Overall, digestion is a vital reaction that enables the body to obtain essential nutrients from food.

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  • 5. 

    Reactions that involve building smaller molecules into larger ones are known as ....

    Anabolic reactions refer to the biochemical processes that involve the synthesis or building of larger molecules from smaller ones. These reactions require energy and are responsible for the growth, repair, and maintenance of cells and tissues in living organisms. Anabolic reactions are essential for processes like protein synthesis, DNA replication, and muscle growth. They are the opposite of catabolic reactions, which involve the breakdown of larger molecules into smaller ones.

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  • 6. 

    How many bonds can a Carbon atom have?

    A carbon atom can have a maximum of four bonds. This is because carbon has four valence electrons, which it can share with other atoms to form covalent bonds. Each bond is formed by sharing one electron, and since carbon has four valence electrons, it can form four bonds. This makes carbon a versatile element, as it can form stable compounds with a wide variety of other elements.

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  • 7. 

    How can metabolic rate be measured?

    Metabolic rate can be measured by calculating the amount of oxygen uptake per unit time in an individual. This measurement provides an indication of respiration, which is responsible for generating ATP, the energy required for metabolism. By quantifying the oxygen consumption, we can determine the rate at which an organism is utilizing energy and carrying out metabolic processes.

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  • 8. 

    What does the term 'balanced diet' mean?

    A balanced diet refers to a diet that includes all the necessary nutrients in the right proportions to meet the individual's needs. It should also provide enough energy for the person's metabolism and activity level, as well as an adequate intake of water and fiber. This ensures that the body receives all the essential nutrients, vitamins, and minerals required for optimal health and functioning.

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