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Nutrient Cycles

Table 9-14-1: Use of nutrients in plants and animals
PLANTS ANIMALS
CARBON Organic substances / lipids / proteins / ATP / chlorophyll Organic substances / lipids / proteins / ATP / chlorophyll
NITROGEN - Amino acid / nucleotide synthesise - In RNA, DNA, proteins, ATP - Amino acid / nucleotide synthesise - In RNA, DNA, proteins, ATP
IRON - In cytochromes / ETC - Needed for enzymes such as catalase to work - Synthesis of chlorophyll - In cytochromes / ETC - Needed for enzymes such as catalase to work - Part of Hb
IODINE Contained in thyroxine (hormone)
MOLYBDENUM Nitrate reductase / reduces nitrates during synthesis of amino acids

Carbon Cycle

Respiration, Photosynthesis and CO2

Nitrogen Cycle

1) Assimilation (→Building up organic molecules)

2) Ammonification*

3) Nitrification*

4) Denitrification

5) Nitrogen Fixation*