How many different protein tripeptides (polymers that are 3 subunits long) are p

Question

How many different protein tripeptides (polymers that are 3 subunits long) are possible? A. 4 B. 16 C. 20 D. 400 E. 8000 The conversion of RNA information into protein information is called: A. translation B. copying C. transmogrification D. transcription E. deciphering Which of the following structure-function pairs from eukaryotic cells is mismatched? A. plasma membrane; protein synthesis B. chloroplast, photosynthesis C. nucleolus; ribosome production D. flagellum, cell movement E. Golgi; protein modification A partial positive charge ( ) is associated with: A. the O atoms of water molecules B. the H atoms of water molecules C. sodium atoms D. chlorine atoms E. lipids Storing Ca ions, synthesizing phospholipids and containing detoxifying enzymes (in the liver) are functions of A. lysosomes B. smooth ER C. rough ER D. plasma membranes E. nuclear envelopes

Explanation / Answer

1. As there are 20 amino acids, total combinations can be 20^3 i.e 8000. So, answer is E.

2. A. Translation.

3. A. Plasma membrane; protein synthesis. Protein synthesis occurs in ribosomes or rough ER, not in the plasma membrane.

4. B.  Water has a partial negative charge near the oxygen atom due the unshared pairs of electrons, and partial positive charges near the hydrogen atoms.

5. B. smooth ER

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