In humans and many other mammals, the sex chromosomes are called:

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#Question id: 16086

#Unit 7. System Physiology – Animal

The preoptic region of the hypothalamus

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#Question id: 3002

#Unit 2. Cellular Organization

Cells are most sensitive to penicillin during which phase of the growth curve?

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#Question id: 28680

#Unit 2. Cellular Organization

Mitotic spindle attach to chromosomes via specialized protein structures known as

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#Question id: 16131

#Unit 13. Methods in Biology

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.              

 How many units of ß-galactiosidase would you expect to be expressed from deletion 4 in a gln2– mutant?

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#Question id: 282

#Unit 1. Molecules and their Interaction Relevant to Biology

A HATS enzymes reacts with the side-chain of lysine to form the following structure: What effect will the HATS enzymes have on histones?