The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

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#Question id: 33531

#Unit 2. Cellular Organization

The data obtained during DNA microarray analysis showing wildtype vs. mutant expression of genes under different conditions, represented as

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#Question id: 5739

#Unit 8. Inheritance Biology

Polyploid plants found in nature usually have even numbers of chromosomes because organisms having odd numbers

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#Question id: 31083

#Unit 4. Cell Communication and Cell Signaling

The rise in the cytosolic Ca²⁺ level is transient because: 

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#Question id: 19735

#Unit 3. Fundamental Processes

In mammals, six telomeric proteins (TRF1, TRF2, Rap1, TIN2, TPP1, and POT1) comprises a complex which of the following is incorrect regrarding these telomeric protein

a) TRF1, TRF2, Rap1, binds to double stranded of DNA

b) TIN2 does not binds to DNA at all

c) POT1 binds to the GT tail extended by telomerase

d) TIN2 interacts with the two duplex telomeric DNA-binding proteins TRF1 and TRF2 as well as with TPP1

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#Question id: 11855

#General Aptitude

The least number which when divided by 5,6,7 and 8 leaves a reminder 3, but when divided by 9 leaves no reminder is.