Question

The miller-urey.experiment is significant because-it-produced the first scientific evidence that A. → conditions on Earth-4 billion years ago.could produce RNA. B. → conditions on Earth-4-billion years ago.could produce amino acids. 1 C. -it-is-possible-to-produce-LUCA-in-the-laboratory. 1 D.-it-is possible to produce-DNA-under the same conditions.as-on-Earth-4 billion years ago. I How.can-both-clay and-ice-crystals-enhance chemical reactions necessary.to.form-complex.organic- molecules? A. → Both have highly reactive.surfaces that help to lower the energy of activation for reactions that form complex.organic-molecules. I B. → Both trap.the-water-needed-in-reactions-thatresult-in-organic molecules. 1 C. → Both have the necessary.elements-to-form-amino-acids. 1 D. Both-have-microscopic-spaces-that-help to concentrate-reagents, facilitating-reactions involving. those-reagents 1 What chemical pathway is proposed to have taken place-in-alkaline hydrothermal-vents-leading to the formation-of-nucleic acids.? A. → condensation-of-methane 1 B.-fermentation-of-pyruvate 1 C. + CO2-reduction to formate.then-formose reaction | D.-nucelophile-reduction E. → What was the energy source.?

Answer 1

Miller and Urey conducted the experiment and created conditions same as primitive earth. They produced temperature of 800 degrees and created lightning Sparks which produced conditions same as primitive Earth. They used methane, ammonia and water in the flask and after one week they were observed that there were amino acids, carbohydrates and glycerol as well as fatty acids.

A is incorrect as they couldn't prove the formation of nucleic acid.

B is correct as they proved the formation of amino acids.

C is incorrect as they did not prove the formation of LUCA.

D is incorrect as they did not prove the formation of DNA.

So, the correct answer is B.