Amity University 2006 Diploma Information Technology iit jee with answers - Question Paper

B. When immersed in water, DAA is hydrolized to become 2,3-diketogluconic acid.
C. Frying increases the likelihood for DAA to break down into other compounds.
D. Frying dries out the potatoes and decreases the tendency for DAA to hydrolyze.
Answer: C
Description: If it were actual that frying increased the likelihood of DAA breaking down into other compounds, then we would expect to see less DAA when frying than when boiling. But the opposite is true, so this explanation must be false.
Passage three
Gamma ray bursts are bursts of very high energy electromagnetic radiation that astronomers have observed to occur roughly once per week at random locations in the sky. These bursts current a puzzle to scientists and 2 astronomers, Jesse and Becky, take various positions.
Jesse:
The bursts appear to be isotropic - that is evenly spread out in the sky. But our galaxy is disk shaped, so if the sources were within our galaxy, then they would not appear uniformly across the sky. Therefore, the gamma ray bursts must originate outside our galaxy.
Becky:
The issue is that every of these bursts contains a large amount of gamma radiation. If a single light bulb appeared bright from a large distance, then it would have to be a very powerful bulb. The identical thing is actual of gamma ray bursts. They appear bright to us, and if they are far away and if the energy emanates from them in all directions, the source must be extraordinarily powerful. We do not know of any mechanism in the universe that could produce that much energy. Therefore, the gamma ray bursts must come from lower energy sources closer to us.
Q. 11 Which of the subsequent is an assumption made by Becky, but not necessarily by Jesse?
A. Gamma ray bursts carry electromagnetic radiation.
B. The energy from a gamma ray burst spreads out evenly in a sphere.
C. Our galaxy is shaped like a disk.
D. The direction of a light source can be determined.
Answer: B
Description: Becky uses this assumption to argue that the source of energy must be enormously powerful. But what if the gamma ray burst were directed in a thin beam at the Earth? Then an astronmer would not have to worry that the energy we see on Earth is only 1 tiny tiny fraction of the energy of the source. We might see most or all of the energy of the source, as if a light beam were pointed directly at us. The assumption that the gamma radiation emanates in all directions from its source is critical to Becky's argument, but Jesse may well disagree

Earning:   Approval pending.