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151 Which of the following is NOT a type of biological macromolecule?

A: Carbohydrates

B: Proteins

C: Water

D: Nucleic acids

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152 What are biological macromolecules primarily composed of?

A: Cells

B: Small molecules

C: Monomers

D: Lipids

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153 Which of the following elements is primarily involved in the nitrogen cycle?

A: Oxygen

B: Phosphorus

C: Nitrogen

D: Sulfur

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154 What is the importance of carbon’s tetra-valence?

A: Increases reactivity

B: Stabilizes structures

C: Allows for complex molecules

D: Aids in energy storage

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155 Which element is a major component of nucleotides?

A: Carbon

B: Sulfur

C: Phosphorus

D: Hydrogen

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156 What is the primary function of oxygen in cellular respiration?

A: Energy storage

B: Final electron acceptor

C: Protein synthesis

D: Nitrogen fixation

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157 How does hydrogen contribute to cellular processes?

A: By forming disulfide bonds

B: By providing energy

C: By stabilizing proteins

D: By aiding in water formation

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158 Which of the following is a function of phosphorus?

A: DNA structure

B: Oxygen transport

C: Carbon storage

D: Energy release

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159 What is the role of sulfur in proteins?

A: Energy source

B: Structural component

C: Toxicity

D: Genetic information

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160 Which element is crucial for the production of ATP?

A: Phosphorus

B: Sulfur

C: Nitrogen

D: Oxygen

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