Which one of the following provides rapid block to polyspermy during sea urchin fertilization?

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#Question id: 20975

#Unit 12. Applied Biology

In glucose electrode, glucose oxidase has been coupled to an electrode by which of the following materials?

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#Question id: 4850

#Unit 8. Inheritance Biology

When F1generation of a dihybrid is allowed to self fertilized, the expected ratio is of genotype when complete linkage?

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#Question id: 15839

#Unit 8. Inheritance Biology

In the yeast cross of ade2 met14 his3 x + + +, a total of 120 tetrads are analyzed. The following tetrad types are found in the numbers shown below each tetrad. The markers ade2, met14, and his3 are abbreviated a, m, and h and the wild type allele of each gene is indicated by +.

 

Use this categorization and the numbers of each type to determine which (if any) of the three markers are linked. For any linked markers, calculate the distance between them in cM.      

To measure the distance between two linked His– mutations, you cross a his2– mutant to a his4– mutant and then dissect 100 tetrads. Your lab partner records which spore clones are His+ and which are His– ; but then the fool loses the papers on which most of the data is recorded. In the end all he can remember is that there were three different tetrad types an that there was only one tetrad of the type with 2 His+ and 2 His– spore clones.

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#Question id: 21259

#Unit 12. Applied Biology

Production of l-Threonine amino acid used for feeding pigs and poultry, Starting from l-aspartate, the pathway involves five steps catalyzed by five enzymes sequence of using enzyme is that;

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#Question id: 24442

#Unit 13. Methods in Biology

Match the following Column I with Column II 

Column I	Column II
A. PR segment	i. Plateau portion of the ventricular action potential
B. PR interval	ii. Conduction through atrioventricular node
C. ST segment	iii. The time from initial depolarization of the atria to initial depolarization of the ventricles
D. ST interval	iv. An isoelectric portion of the QT interval