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Galactosidase

Galactosidase

(Science: enzyme) One of a class of enzymes which cuts the glycosidic bond between the sugar galactose and another sugar molecule (of a different type than galactose).

there are two subclasses - the alpha galactosidases and beta galactosidases - which cuts the two types of glycosidic bonds (alpha and beta, respectively). An enzyme responsible for the breaking down of galactose.


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Drosophila genes

From which organisms is the following genetic elements derived? UAS promoter Options: bacteria drosophila yeast I think answer is drosophila Beta-galactosidase Options: bacteria drosophila yeast I think answer is bacteria Gal-4 Options: bacteria drosophila yeast I think answer yeast

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by revision
Thu Dec 13, 2012 9:33 pm
 
Forum: Molecular Biology
Topic: Drosophila genes
Replies: 1
Views: 260

Help on biology question?

... had these two strains of drosophila: AA= contains the gene for Gal 4 and a UAS upstream of alcohol dehydrogenase BB= has a UAS upstream of Beta- Galactosidase What would you expect to be able to detect in the flies from the following crosses: AA X AA Options: A.Nothing B.Alcohol dehydrogenase ...

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by revision
Tue Dec 11, 2012 6:38 pm
 
Forum: Molecular Biology
Topic: Help on biology question?
Replies: 0
Views: 291

Biology question help?

... source you could artificially increase cAMP levels (which are normally associated with starvation). What would happen to the expression of beta-galactosidase? Options: 1.It would be activated because the cAMP binding protein CAP would bind to the beta-galactosidase promoter 2. It would be reduced ...

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by revision
Sat Dec 08, 2012 6:24 pm
 
Forum: Molecular Biology
Topic: Biology question help?
Replies: 5
Views: 891

protiens

... source you could artificially increase cAMP levels (which are normally associated with starvation). What would happen to the expression of beta-galactosidase? 1. It would be activated because the cAMP binding protein CAP would bind to the beta-galactosidase promoter 2. It would be reduced 3. ...

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by 2468
Tue Dec 04, 2012 1:11 am
 
Forum: Molecular Biology
Topic: protiens
Replies: 1
Views: 465

Gene regulation

... gene and containing a low copy number plasmid with a cbbA:lacZ transcriptional fusion (the strain therefore lacks a functional cbbA gene). While -galactosidase activity in this strain is low, spontaneous mutants appear with high activity. In these mutants, he replaces the fusion plasmid with a ...

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by tteessffaa
Fri Nov 30, 2012 8:44 am
 
Forum: Molecular Biology
Topic: Gene regulation
Replies: 0
Views: 343
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