Problem:Context: The NSO is conducted on two levels each year. It was the first Olympiad to be conducted by SOF.It has been conducted since 1996. Students from class I-XII may participate in the examination.

Question: how many levels are there in science olympiad?
Solution:OK... The relevant information to answer the above question is: The NSO is conducted on two levels each year.
two levels.

Problem:In December 1941, American expatriate Rick Blaine owns an upscale nightclub and gambling den in Casablanca. "Rick's Cafe Americain" attracts a varied clientele, including Vichy French and German officials, refugees desperate to reach the still-neutral United States, and those who prey on them. Although Rick professes to be neutral in all matters, he ran guns to Ethiopia during its war with Italy and fought on the Loyalist side in the Spanish Civil War.

Answer this question based on the passage: where does the story of the film casablanca take place?
Solution:OK... To answer the above question, the relevant sentence is: In December 1941, American expatriate Rick Blaine owns an upscale nightclub and gambling den in Casablanca.
Casablanca.

Problem:In biological processes, the direction an ion moves by diffusion or active transport across a membrane is determined by the electrochemical gradient. In mitochondria and chloroplasts, proton gradients are used to generate a chemiosmotic potential that is also known as a proton motive force. This potential energy is used for the synthesis of ATP by oxidative phosphorylation or photophosphorylation, respectively.

Answer this question: what uses the energy found within a proton gradient to drive the synthesis of atp?
Solution:
OK... The important part for answering this question is: This potential energy is used for the synthesis of ATP by oxidative phosphorylation or photophosphorylation, respectively.
oxidative phosphorylation.