What would you expect about the formation of an α-helix for a segment of a protein chain that contains lysine approximately every fourth residue with all other residues being mostly hydrophobic?

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#Question id: 774

#SCPH06 I Botany

RISC stands for:

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#Question id: 2964

#SCPH01 Biochemistry

Starting with a fertilized egg (zygote), a series of six cell divisions would produce an early embryo with how many cells?

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#Question id: 23257

#SCPH28 | Zoology

Centromeric probes are useful in identifying 

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#Question id: 662

#SCPH06 I Botany

________ received a Nobel Prize in 1964 for determining the structure of vitamin B12. He/she also solved the structure of penicillin in 1947 and developed many techniques used in the study of large proteins.

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#Question id: 16129

#SCPH01 Biochemistry

5 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS.

Describe the cis-acting elements in the GLN1 promoter that are evident from these experiments, giving both their position and as much of their function as you can deduce.