{
  "id": "89e89149-af05-56aa-8a33-2b3bdc4d9601",
  "slug": "biological-molecules-overview",
  "title": "Biological molecules: overview",
  "course": "General Biology",
  "questionCount": 20,
  "page": "https://splycr.com/general-biology/biological-molecules-overview",
  "data": "https://splycr.com/library/biological-molecules-overview.json",
  "play": "https://splycr.com/?set=89e89149-af05-56aa-8a33-2b3bdc4d9601",
  "source": {
    "name": "Biology by Bradford",
    "href": "https://www.biologybybradford.com",
    "note": "Written for the splycr library by Biology by Bradford."
  },
  "questions": [
    {
      "number": 1,
      "question": "Which elements are found in all carbohydrates?",
      "answer": "C, H and O",
      "wrongOptions": [
        "C, H, O and N",
        "C, H, O and P",
        "C, H, N and S"
      ]
    },
    {
      "number": 2,
      "question": "Which statement best defines metabolism?",
      "answer": "All enzyme-catalysed reactions in a cell or organism",
      "wrongOptions": [
        "All reactions in the gut that break food into monomers",
        "All reactions in a cell that release energy from glucose",
        "All reactions that build large molecules from small ones"
      ]
    },
    {
      "number": 3,
      "question": "What happens in a condensation reaction?",
      "answer": "Two monomers join and water is released",
      "wrongOptions": [
        "Water is added and a bond is broken apart",
        "Two monomers join and water is used up",
        "A polymer splits and water is released"
      ]
    },
    {
      "number": 4,
      "question": "What is the difference between α-glucose and β-glucose?",
      "answer": "The position of an –OH group",
      "wrongOptions": [
        "The number of carbon atoms",
        "The number of oxygen atoms",
        "Whether the molecule is a ring"
      ]
    },
    {
      "number": 5,
      "question": "Why is glycogen highly branched?",
      "answer": "Many ends allow glucose to be released rapidly",
      "wrongOptions": [
        "Branches let it form strong fibres in cell walls",
        "Branches make it soluble so it travels in blood",
        "Branches hold more water so it stores more energy"
      ]
    },
    {
      "number": 6,
      "question": "Why does cellulose form straight chains while amylose coils?",
      "answer": "Cellulose is made of β-glucose",
      "wrongOptions": [
        "Cellulose has many 1–6 bonds",
        "Amylose is made of β-glucose",
        "Cellulose chains are highly branched"
      ]
    },
    {
      "number": 7,
      "question": "A triglyceride forms by condensation between one glycerol and what?",
      "answer": "Three fatty acids",
      "wrongOptions": [
        "One fatty acid",
        "Three amino acids",
        "Two fatty acids and a phosphate"
      ]
    },
    {
      "number": 8,
      "question": "Some fatty acids have a bend in their chain. What causes it?",
      "answer": "H atoms on the same side of a C=C bond",
      "wrongOptions": [
        "H atoms on opposite sides of a C=C bond",
        "No C=C double bonds anywhere in the chain",
        "A phosphate group attached to the chain"
      ]
    },
    {
      "number": 9,
      "question": "In a membrane, why do the phospholipid tails point inwards?",
      "answer": "The tails are hydrophobic, so are repelled by water",
      "wrongOptions": [
        "The tails are hydrophilic, so are attracted to water",
        "The tails bind to glycerol in the other layer",
        "The tails are charged, so are attracted to the heads"
      ]
    },
    {
      "number": 10,
      "question": "Why do humans still store some energy as glycogen rather than only as fat?",
      "answer": "Glucose can be mobilised and transported fast",
      "wrongOptions": [
        "Glycogen stores more energy per gram than fat",
        "Glycogen insulates the body against heat loss",
        "Fats cannot be used in respiration at all"
      ]
    },
    {
      "number": 11,
      "question": "Which element is found in proteins and nucleic acids but not in carbohydrates?",
      "answer": "Nitrogen",
      "wrongOptions": [
        "Phosphorus",
        "Sulfur",
        "Oxygen"
      ]
    },
    {
      "number": 12,
      "question": "Which type of metabolism builds larger molecules from smaller ones?",
      "answer": "Anabolism",
      "wrongOptions": [
        "Catabolism",
        "Hydrolysis",
        "Digestion"
      ]
    },
    {
      "number": 13,
      "question": "Which reaction uses water to break a bond between two monomers?",
      "answer": "Hydrolysis",
      "wrongOptions": [
        "Condensation",
        "Denaturation",
        "Respiration"
      ]
    },
    {
      "number": 14,
      "question": "What is the monomer of nucleic acids such as DNA and RNA?",
      "answer": "Nucleotide",
      "wrongOptions": [
        "Amino acid",
        "Monosaccharide",
        "Fatty acid"
      ]
    },
    {
      "number": 15,
      "question": "Which bond links two monosaccharides together?",
      "answer": "Glycosidic bond",
      "wrongOptions": [
        "Peptide bond",
        "Ester bond",
        "Hydrogen bond"
      ]
    },
    {
      "number": 16,
      "question": "Which disaccharide is made from two α-glucose molecules?",
      "answer": "Maltose",
      "wrongOptions": [
        "Sucrose",
        "Lactose",
        "Galactose"
      ]
    },
    {
      "number": 17,
      "question": "Which plant energy-storage polysaccharide is made of amylose and amylopectin?",
      "answer": "Starch",
      "wrongOptions": [
        "Glycogen",
        "Cellulose",
        "Chitin"
      ]
    },
    {
      "number": 18,
      "question": "Which type of bond joins a fatty acid to glycerol?",
      "answer": "Ester bond",
      "wrongOptions": [
        "Glycosidic bond",
        "Peptide bond",
        "Hydrogen bond"
      ]
    },
    {
      "number": 19,
      "question": "What term describes a fatty acid with no C=C double bonds in its chain?",
      "answer": "Saturated",
      "wrongOptions": [
        "Unsaturated",
        "Polyunsaturated",
        "Cis"
      ]
    },
    {
      "number": 20,
      "question": "Which type of lipid is built from four fused carbon rings, such as testosterone?",
      "answer": "Steroid",
      "wrongOptions": [
        "Phospholipid",
        "Triglyceride",
        "Wax"
      ]
    }
  ]
}