A living cytoplasmic connection penetrate the walls between sieve tube elements and their companion cells; which are often complex and branched on the companion cell side, known as

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#Question id: 1670

#SCPH05 I Biotechnology

The T-cell receptor genes were originally identified using:

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#Question id: 15654

#SCPH01 Biochemistry

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. Next you isolate a mutation, designated MelB–, which gives uninducible melibiase activity. Mapping experiments show that MelB– is linked to Mel1. Using an F' factor that carries the chromosomal region surrounding Mel1, you perform the following genetic tests:

                      

Describe the basic genetic properties of the MelB– mutation?

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#Question id: 11970

#SCPH28 | Zoology

Why do the cells of the digestive system secrete proteolytic enzymes, such as pepsin, in their inactive forms?

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#Question id: 4158

#SCPH01 Biochemistry

What is a reasonable number of nucleotides in a tRNA molecule?

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#Question id: 18661

#SCPH01 Biochemistry

Which of the following highly sensitive analytical technique particularly useful for studying microheterogeneity in a protein