Question 30
Question 30 of 40
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Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
19. Relationships of orga...
19.2. Nutrient cycles

Outline the nitrogen cycle in making nitrogen available for plant and animal protein, limited to: (a) decomposition of plant and animal protein to ammonium ions (b) nitrification (c) nitrogen fixation by lightning and bacteria (d) absorption of nitrate ions by plants (e) production of amino acids and protein (f) feeding and digestion of proteins (g) denitrification (the names of individual bacteria are not required)

13. Excretion
13.2. Urinary system

Describe deamination in the liver as the removal of the nitrogen-containing part of amino acids, resulting in the formation of urea

6. Plant nutrition
6.3. Mineral nutrition

Explain the importance of nitrate ions for making amino acids, required for the production of proteins