State that chlorophyll is a green pigment that is found in chloroplasts
State that chlorophyll is a green pigment that is found in chloroplasts
1 Answer
Questions and Answers
Explain the effect of changes in temperature and pH on enzyme activity in terms of kinetic energy, shape and fit, denaturation and the frequency of effective collisions
Explain the effect of changes in temperature and pH on enzyme activity in terms of kinetic energy, shape and fit, denaturation and the frequency of effective collisions
1 Answer
Investigate and describe the effects of temperature and pH on enzyme activity
Investigate and describe the effects of temperature and pH on enzyme activity
1 Answer
Describe that the progress of enzyme-catalysed reactions can be followed by measuring the concentrations of reactants and products
Describe that the progress of enzyme-catalysed reactions can be followed by measuring the concentrations of reactants and products
1 Answer
Explain the specificity of enzymes in terms of the complementary shape and fit of the active site with the substrate (‘lock and key’ hypothesis)
Explain the specificity of enzymes in terms of the complementary shape and fit of the active site with the substrate (‘lock and key’ hypothesis)
1 Answer
Explain enzyme action with reference to the substrate, active site, enzyme-substrate complex, and product
Explain enzyme action with reference to the substrate, active site, enzyme-substrate complex, and product
1 Answer
Describe enzymes as proteins that function as biological catalysts and are involved in all metabolic reactions
Describe enzymes as proteins that function as biological catalysts and are involved in all metabolic reactions
1 Answer
Describe a catalyst as a substance that increases the rate of a chemical reaction and is not changed by the reaction
Describe a catalyst as a substance that increases the rate of a chemical reaction and is not changed by the reaction
1 Answer
Describe and be able to do chemical tests for: (a) starch (iodine solution) (b) glucose and maltose (Benedict’s solution) (c) protein (biuret test) (d) lipids (ethanol emulsion test)
Describe and be able to do chemical tests for: (a) starch (iodine solution) (b) glucose and maltose (Benedict’s solution) (c) protein (biuret test) (d) lipids (ethanol emulsion test)
1 Answer
State that large molecules are made from smaller molecules, limited to: starch, cellulose and glycogen from glucose; proteins from amino acids; lipids from fatty acids and glycerol; DNA from nucleotides
State that large molecules are made from smaller molecules, limited to: starch, cellulose and glycogen from glucose; proteins from amino acids; lipids from fatty acids and glycerol; DNA from nucleotides
1 Answer
Quiz Leaderboard
1st
Sourav
Score: 90%
Questions: 20
2nd
Priyanka
Score: 90%
Questions: 10
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Vesnce
Score: 45%
Questions: 20
4th
Hector
Score: 40%
Questions: 10
Total Questions 2747
Top Questions
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Discuss the advantages and disadvantages of genetically modifying crops, including soya, maize and rice
Genetically modified (GM) crops, such as soybeans, maize, and rice,
Sourav
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Outline the process of genetic modification using bacterial production of a human protein as an example, limited to: (a) isolation of the DNA making up a human gene using restriction enzymes, forming sticky ends (b) cutting of bacterial plasmid DNA with the same restriction enzymes, forming complementary sticky ends (c) insertion of human DNA into bacterial plasmid DNA using DNA ligase to form a recombinant plasmid (d) insertion of recombinant plasmids into bacteria (specific details are not required) (e) multiplication of bacteria containing recombinant plasmids (f) expression in bacteria of the human gene to make the human protein
<h2 class="mb-2 mt-6 text-lg first:mt-3">Process of Genetic Modification Using Bacterial
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Outline examples of genetic modification: (a) the insertion of human genes into bacteria to produce human proteins (b) the insertion of genes into crop plants to confer resistance to herbicides (c) the insertion of genes into crop plants to confer resistance to insect pests (d) the insertion of genes into crop plants to improve nutritional qualities
<h2 class="mb-2 mt-6 text-lg first:mt-3">Examples of Genetic Modification</h2> Genetic modification involves
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Describe genetic modification as changing the genetic material of an organism by removing, changing or inserting individual genes
Genetic modification (GM) refers to the deliberate alteration of an
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Describe and explain the conditions that need to be controlled in a fermenter, including: temperature, pH, oxygen, nutrient supply and waste products
<h2 class="mb-2 mt-6 text-lg first:mt-3">Conditions to Control in a Fermenter</h2> Fermenters
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Describe how fermenters can be used for the large-scale production of useful products by bacteria and fungi, including insulin, penicillin and mycoprotein
<h2 class="mb-2 mt-6 text-lg first:mt-3">The Use of Fermenters for Large-Scale
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Explain the use of lactase to produce lactosefree milk
<h2 class="mb-2 mt-6 text-lg first:mt-3">The Use of Lactase to Produce
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