Question

1. which biogeochemical cycle is dependent upon the work of bacteria? a) the nitrogen cycle b) the carbon cycle c) the hydrologic cycle d) the phosphorus cycle e) the sulfur cycle 47) which of the following pairs is an incorrect pairing of monomer - organic compound? a) amino acid - carbohydrate b) glucose - carbohydrate c) nucleotide - dna d) amino acid - protein e) hydrocarbon chain - lipid 48) in the process of photosynthesis, which component is an organic molecule? a) glucose b) oxygen c) carbon dioxide d) water e) sunlight

Explanation:

1. Bacteria play a crucial role in the nitrogen - cycle, converting nitrogen gas into forms usable by plants. In the carbon cycle, carbon is cycled mainly through photosynthesis and respiration, not highly dependent on bacteria compared to nitrogen - cycle. The sulfur cycle, phosphorus cycle, and hydrologic cycle do not rely as heavily on bacteria as the nitrogen cycle.
2. Amino acids are the monomers of proteins, glucose is a monomer of carbohydrates, nucleotides are monomers of DNA, and a hydrocarbon chain is part of a lipid. But amino acid - carbohydrate is an incorrect monomer - polymer pairing.
3. In photosynthesis, glucose is an organic molecule produced. Oxygen is a by - product, water and sunlight are reactants, and carbon dioxide is also a reactant.

Answer:

1. A. the nitrogen cycle
2. A. amino acid, carbohydrate
3. A. glucose