Which of the Following Is True of a Compound

question 101

Multiple Choice

Which of the following is true of a compound

• A)A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio.
• B)A compound is a substance that cannot be separated into simpler substances by chemical means.
• C)A compound is combination of two or more substances in which the substances retain their distinct identities.
• D) A compound must be heterogeneous.
• E) A compound must be a solid at room temperature.

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Definitions:

Duplicated

To copy or make a replica of a biological or genetic element, such as a DNA sequence, within an organism.

Methylated DNA

DNA in which methyl groups are added to some bases, often affecting gene expression and involved in gene regulation.

Transcriptionally Inactive

Describes genes or segments of DNA that are not being transcribed into RNA.

Constitutive Genes

Genes that are continuously expressed under normal cellular conditions, providing the basic functions necessary for the cell's survival.