Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q43 (CDS-I/2024) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Genetics and evolution Answer Verified

Photo 51 refers to an image of

Result
Your answer: —  Â·  Correct: B
Explanation

Photo 51 refers to a famous X-ray diffraction image of DNA molecules captured by Rosalind Franklin and Raymond Gosling in May 1952 at King's College London. The image was produced using X-ray crystallography, a technique where X-rays are shone at a purified fiber of DNA, causing the rays to scatter and create a diffraction pattern [2]. This specific photograph, labeled 'Photo 51' because it was the 51st diffraction pattern Franklin recorded, provided the critical evidence for the helical structure of DNA. The distinct 'X' shape in the pattern revealed the double-helix dimensions, which James Watson and Francis Crick subsequently used to build their definitive 3D model of the DNA molecule. While other options refer to lunar features or viruses, Photo 51 is exclusively associated with molecular biology and the discovery of the genetic blueprint.

Sources

  1. [2] https://www.bbc.com/news/health-18041884
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
50%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CAPF · 2022 · Q96 Relevance score: -5.21

The principle of 'common but differentiated responsibilities and respective capabilities', often talked about in media, refers to

IAS · 2022 · Q69 Relevance score: -6.33

In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements : 1. The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform. 2. Sputnik V vaccine is manufactured using vector based platform. 3. COVAXIN is an inactivated pathogen based vaccine. Which of the statements given above are correct ?

CAPF · 2021 · Q80 Relevance score: -7.41

How many different words, with or without meaning, can be formed by using the letters of the word COVID?

CDS-I · 2011 · Q8 Relevance score: -7.49

A close bottle containing water at room temperature was taken to the Moon and then the lid is opened. The water will

IAS · 2007 · Q34 Relevance score: -7.78

NASA’s Deep Impact space mission was employed to take detailed pictures of which comet nucleus?