SSC GD Const 2025 (English) - 05 Feb 2025 - Shift 1

5 February 2025 • 80 questions

Mock testSource label: Test Series

Question 1 / 80

In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Deoxyribonucleic acid (DNA) is a very special molecule. It (1)__________________ as the code for all life on Earth, holding the cellular instructions to (2)______________ everything from a beetle to a human. Because DNA is (3)_________________ to each species, it’s like a product barcode in a supermarket. As animals and plants live their lives, they (4)________________ fragments of their DNA into their environment (5)_________________ dead skin, hair, saliva, scat, leaves or pollen. These traces make up environmental DNA. There’s enough DNA in water and even air to tell species apart.

Select the most appropriate option to fill in blank no. 5.

Show answer & explanation

Correct answer: D

Explanation

The correct answer is option 4 i.e. through.
Context: The sentence explains the way DNA fragments are released into the environment. The correct word should show the medium or means by which this happens.
Meaning of the words:
Father: means a male parent; unrelated to the context.
Above: means at a higher place or position.
For: means intended for or in support of something.
Through: means by means of; using something as a medium.
Correct word: Through
Reason: The fragments of DNA are released into the environment through dead skin, hair, saliva, scat, leaves, or pollen. Other words don’t convey the correct relationship between DNA release and the medium.
Final Sentence: They shed fragments of their DNA into their environment through dead skin, hair, saliva, scat, leaves, or pollen.
Hence, the chosen option is correct.

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