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Biology
Biological Molecules Quiz 1
Topic 3 Quiz 1
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Category: Biological Molecules Quiz 1
1) Sunflower seeds contain a nutrient which is broken by lipase during germination. Which test would detect this nutrient?
Lipase breaks down fat, which can be detected by the ethanol emulsion test.
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2) Which component of a balanced diet is used to make new enzyme molecules?
Enzymes are proteins.
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3) Which elements are present in all fats?
Fat consists of elements hydrogen carbon and oxygen only
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4) The recommended diet for soldiers in Arctic condition is different from the recommended for tropical condition. What should the Arctic diet include?
More fat is required to form a thicker insulating layer of fatty tissue under the skin to prevent excessive heat loss from the body into the cold environment.
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5) Which element in the molecule of urea shows that it is formed from amino acid and not from glucose?
Elements that make up amino acid are carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. Glucose C6H12O6 is made-up of carbon, hydrogen and oxygen.
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6) Which of the following is an energy-rich carbohydrate stored in large quantities in liver and muscle cells?
Excess glucose is stored as insoluble glycogen in the liver and muscle cells. Glucose is used in respiration to produce energy to maintain body temperature and for muscle contractions
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7) The production of urea increases when the diet contains a large amount of?
The final product of the digestion of proteins in the elementary canal is an amino acid. Excess amino acids formed from large amounts of proteins are deaminated in the liver to form urea and glucose. The urea is excreted by the kidney in urine and the glucose is converted to glycogen and stored in the liver.
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8) Which property of water is important for chemical reactions to take place inside cells?
Water access is solvent to dissolve many substances allowing chemical reaction to take place.
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9) Which chemical elements are combined to make molecules of starch and cellulose?
Protein contain carbon, hydrogen, oxygen and nitrogen. Starch and cellulose which are carbohydrates contain carbon, hydrogen and oxygen only.
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10) Which chemical element forms part of all protein molecules?
Proteins are made up of amino acids which consist of carbon, hydrogen, oxygen, and nitrogen.
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