Which Are Purines

question 41

Multiple Choice

Which are purines?

• A)Adenine and thymine.
• B)Guanine and adenine.
• C)Cytosine and thymine.
• D)Uracil and guanine.

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Definitions:

Clastic Textures

Textural features found in sedimentary rocks that result from the accumulation and cementation of mineral and rock fragments.

Interlocking Minerals

Minerals that grow together and interlock their crystals, often found in igneous rocks.

Eroded Rocks

Rocks that have been worn down or broken apart by the forces of weathering and erosion.

Cleavage

The tendency of a mineral to break along smooth flat surfaces according to its crystal structure.