How Many Different Tripeptides Can Be Made from Two Molecules

question 6

Multiple Choice

How many different tripeptides can be made from two molecules of the amino acid valine (val) and one molecule of the amino acid alanine (ala) ?

• A)4
• B)3
• C)1
• D)5 or more
• E)2

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Definitions:

Conglomerate

A coarse-grained clastic sedimentary rock composed of rounded to sub-rounded clasts (pebbles, cobbles, and boulders) in a fine-grained matrix of sand and mud.

Breccia

A rock composed of large, angular fragments; typically formed in sedimentary environments, but can be formed by volcanic, hydrothermal, or tectonic processes.

Sandstone

A sedimentary rock formed by the consolidation and compaction of sand and held together by a natural cement, such as silica.

Cement

1. A natural material precipitated in the pore spaces between grains, helping to hold the grains together. 2. A processed, whitish powder, typically derived from calcium carbonate, that sets to a solid mass when mixed with water and usually other materials.