Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they:

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#Question id: 32249

#Unit 2. Cellular Organization

Soluble ER-resident proteins contain which sorting signal that allows them to be retrieved?

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#Question id: 18847

#Unit 13. Methods in Biology

You know that the protein you want to purify from a natural source forms a multimer with multiple sub-units giving a molecular weight in solution much bigger than visualised denatured on SDS-PAGE. There is only a small amount of the target protein in the total protein sample. Which of the following is an appropriate purification strategy?

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#Question id: 4088

#Unit 3. Fundamental Processes

The 28S, 18S, and 5.8S rRNAs are

a. transcribed by RNA polymerase II.

b. encoded by a single transcription unit.

c. arranged in tandem arrays. 

d. processed in the cytoplasm.

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#Question id: 29570

#Unit 6. System Physiology – Plant

Bacteria such as Pseudomonas, Xanthomonas, Ralstonia, Erwinia, Pectobacterium Similarities between their bacterial pathogenic island can be estimated by

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#Question id: 2235

#Unit 2. Cellular Organization

The generation and maintenance of a membrane electric potential requires which of the following:

a. active pumping of ions       

b. ion-specific membrane channel proteins

c. ATP                                    

d. a generally permeable membrane