The average weight of 55 students in a class is 30kg if 15 of the students whose average weight is 28 kg leave the class find the average weight of the remaining students

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#Question id: 15657

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

You next construct a MelA– MelB– double mutant, which gives the following behavior:

 

Which of your two models is consistent with this new data?

a) the MelA- MelB- double mutant is identical to the MelB- mutant

b) MelA- is epistatic to MelB-

c) MelB- is epistatic to MelA-

d) the MelA- MelB- double mutant is identical to the MelA- mutant

Which of the following is the correct prediction about the double mutants?

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#Question id: 6536

#General Aptitude

Which of the following options is the best choice for the missing number?

0.1, 0.25, 0.3, 0.2, 0.5, 0.6, 0.3, ?, 0.9, 0.4, 1.0, 1.2

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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: 18392

#Unit 12. Applied Biology

How Deinococcus radiodurans are naturally resistant to quite high levels of ionizing radiation

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#Question id: 3399

#Unit 11. Evolution and Behavior

What is probability of neutral mutation to be lost from the population size 100 and Probability of being homozygote in given population size 10 respectively?