A cell does not want to waste energy synthesizing the amino acid arginine if arginine is present in its diet. Therefore, when arginine is present, it activates a repressor protein to prevent transcription of genes that code for enzyme to make arginine. This is an example of what type of regulation?

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#Question id: 2107

#I Life Science/ Life Sciences Group – I-V

All the following statements describe biomembranes except:

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#Question id: 11530

#SCPH06 I Botany

 Went used Avena sativa (oat) coleoptiles in a technique called the

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#Question id: 15872

#SCPH05 I Biotechnology

For optimum callus growth, the given some following vitamins are required, except;

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#Question id: 254

#SCPH12 I Genetics

In addition to knowing the chemical structures of the nucleotides, Watson and Crick used ________ of Franklin and Wilkins and the chemical equivalencies of Chargaff in order to propose their model of DNA structure.

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#Question id: 17073

#SCPH28 | Zoology

Hypoxanthine is converted into guanine by the enzyme HGPRT an enzymes of the salvage pathway. What does HGPRT stands for?