DNA Barcoding - Marvel Education

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Practice Reading: Fill in The Blanks (Drag & Drop) ID: #833 DNA Barcoding

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* Drag the correct answer into all target fields

DNA barcoding was invented by Paul Hebert of the University of Guelph, in Ontario, Canada, in 2003. His idea was to an unique identification tag for each species based on a short of DNA. Separating species would then be a simple task of sequencing this tiny bit of DNA. Dr. Hebert proposed part of a gene called cytochrome c oxidase I (COI) as suitable to the task. All animals have it. It seems to vary enough, but not too much, to act as a reliable marker. And it is easily , because it is one of a handful of genes found outside the cell nucleus, in structures called mitochondria.

sample extracted stretch find generate success

Result:

A.I. Explanation:

Correct answer: generate
Explanation: The verb 'generate' fits grammatically as it is in the infinitive form, which is appropriate following 'was to.' Contextually, it aligns with the intention of creating a unique identification tag, making it the correct choice.
Meaning: 'Generate' means to produce or create something, in this case, an identification tag.
Wrong options:
success: 'Success' is a noun that does not fit grammatically as it cannot follow 'was to' in this context.
find: 'Find' is a verb that does not convey the intended meaning of creating something new, making it unsuitable here.
sample: 'Sample' is a noun that does not fit grammatically in this context, as it does not align with the action of creating an identification tag.
extracted: 'Extracted' is a past participle that does not fit the grammatical structure required after 'was to.' It also does not relate to the action of creating an identification tag.
Correct answer: stretch
Explanation: The word 'stretch' is a noun that fits grammatically as it describes a portion of DNA. Contextually, it refers to the segment of DNA used for identification, making it the correct choice.
Meaning: 'Stretch' refers to a continuous length or extent of something, in this case, a segment of DNA.
Wrong options:
success: 'Success' is a noun that does not describe a part of DNA and does not fit grammatically in this context.
generate: 'Generate' is a verb that does not fit as it does not describe a segment of DNA, making it unsuitable here.
find: 'Find' is a verb that does not relate to the context of describing a portion of DNA, thus it is incorrect.
sample: 'Sample' is a noun that could refer to a part but does not specifically indicate a segment of DNA, making it less precise than 'stretch.'
extracted: 'Extracted' is a past participle that does not fit grammatically or contextually as it does not describe a part of DNA.
Correct answer: extracted
Explanation: The word 'extracted' is a past participle that fits grammatically as it describes the action of obtaining DNA. Contextually, it aligns with the ease of obtaining DNA from mitochondria, making it the correct choice.
Meaning: 'Extracted' means to remove or obtain something from a source, in this case, DNA from mitochondria.
Wrong options:
success: 'Success' is a noun that does not fit grammatically or contextually as it does not describe an action related to obtaining DNA.
find: 'Find' is a verb that does not convey the action of obtaining DNA and does not fit the context here.
sample: 'Sample' is a noun that does not fit grammatically as it does not describe the action of obtaining DNA.
generate: 'Generate' is a verb that does not fit in this context as it does not relate to the action of obtaining DNA from a source.

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