RNA molecules
Nucleotides
DNA molecules
Enzymes
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The inherited traits of an organism are controlled by C. DNA molecules. DNA (deoxyribonucleic acid) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses. DNA is made up of nucleotides, which are the building blocks of DNA. The sequence of nucleotides in a DNA molecule determines the genetic information it carries.
The correct answer is:
C. Copper(II) oxide (CuO)
Explanation:
Copper turnings (A): Copper metal does not react with dilute H₂SO₄ under normal conditions because it is below hydrogen in the electrochemical series and does not displace hydrogen from acids.
Copper(II) trioxocarbonate(IV) (B): CuCO₃ reacts with dilute H₂SO₄, but it produces effervescence due to the release of CO₂ gas.
Copper(II) oxide (C): CuO dissolves in warm dilute H₂SO₄ without effervescence to form blue copper(II) sulfate (CuSO₄):
Copper alloy (D): Alloys contain copper mixed with other metals (e.g., brass, bronze), and their reaction with dilute H₂SO₄ depends on the composition. However, most alloys resist reaction under normal conditions.
Since only CuO dissolves in warm, dilute H₂SO₄ without gas evolution while giving a blue solution, C is the correct answer.
