Lab Manual for Biology
Lab Manual for Biology
12th Edition
ISBN: 9781259298516
Author: Sylvia S. Mader Dr.
Publisher: McGraw-Hill Education
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Chapter 22, Problem 1BS.1QC
Summary Introduction

To explain:

How might a sequence of DNA from an unknown species of fungus help identify it.

Introduction:

R.H. Whittaker in 1969 classified fungi in separate group from plants, protists, animals and prokaryotic organisms. Fungi are considered to be the parasites of the animals and the plants. Many mushrooms are poisonous thus it is unwise and fatal for the amateurs to collect “mushrooms in wild”.

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Explanation of Solution

The DNA is a double helical genetic structure. The strands of the DNA are linked together with hydrogen bonds and the bond formation results from specificity of the bases. DNA libraries and Genomic libraries are the repositories of the sequences.

The sequence of newly discovered or unknown species is used in “conjugation with the known sequences for its identification”. The fungal DNA that is isolated needed to separated into two strands out of which one strand can be used for identification. The thymine to adenine and guanine to cytosine specificity is exploited to bond with the sequences that are already known.

Nucleotide bases are thus identified based on the chemical interactions with the nucleotide of the known species.

Conclusion

A sequence of DNA from an unknown species of fungus can be identified with the help of DNA libraries and Genomic libraries that consists of DNA sequences of known species.

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