Which of the following is not an observation or inference on which natural selection is based?

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#Question id: 14808

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements is true ?

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#Question id: 177

#Unit 1. Molecules and their Interaction Relevant to Biology

The titration curve of alanine shows the ionization of two functional groups with pKa values of 2.34 and 9.69, corresponding to the ionization of the carboxyl and the protonated amino groups, respectively. The titration of di-, tri-, and larger oligopeptides of alanine also shows the ionization of only two functional groups, although the experimental pKa values are different. The trend in pKa values is summarized in the table. Which of the following is a reason for this shift in pK values

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#Question id: 7454

#General Aptitude

What is the angle between the minute and hour hand of a clock at 7 : 35 ?

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#Question id: 19344

#Unit 12. Applied Biology

What is the full form of PSA as a type of cancer bioelements ?

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#Question id: 803

#Unit 1. Molecules and their Interaction Relevant to Biology

A single-stranded DNA molecule contains 40 nucleotides and has the sequence 5’-(GA)20-3’. When this single strand binds to a complementary DNA strand to form a B-DNA structure,