CAT Questions

Q:

Which discovery is attributed to Phoebus Levene?

A) identification of ribose and deoxyribose B) recognition of RNA as DNA’s messenger
C) extraction and observation of DNA D) construction of an accurate DNA model
 
Answer & Explanation Answer: A) identification of ribose and deoxyribose

Explanation:

Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA. He is who studied the structure and function of nucleic acids.

 

The discovery of Identification of Ribose and Deoxyribose is attributed to Phoebus Levene.

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Q:

Select the synonym of
eminent

A) obscure B) common
C) renowned D) phenomenal
 
Answer & Explanation Answer: C) renowned

Explanation:
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Filed Under: English
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Q:

Choose what replaces '?' in the following figure ?

creative111486456294.jpg image

A) Q B) O
C) M D) N
 
Answer & Explanation Answer: D) N

Explanation:

The alphabetical value of the letters in the left hand column follows through the sequence of Prime Numbers, with the letters in the right hand column representing the corresponding reverse alphabetical values. So,

M = Reverse of M = N.

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Q:

Statement: It is estimated that about twenty lakh people will visit the city during the ensuing festival.
Courses of action:
a. The civic authority should monitor the crowd and restrict entry of the people beyond a manageable number.
b. The local police authority should be put on high alert to maintain law and order during the festival.
c. All the hospitals in the city should be put on high alert in case of any eventuality.

A) Only a follows B) Both b & c follows
C) Only c follows D) Both a and b sufficient
 
Answer & Explanation Answer: B) Both b & c follows

Explanation:

Clearly, People cannot be deprived of enjoying the festival for lack of arrangements. Also, it becomes necessary to deploy police to regulate big crowds and avert any mishap in public gatherings. Further, it costs nothing but might prove useful to put hospitals on alert to be ready to provide quick medical aid to patients in case of any eventuality. So, both b and c follow.

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Filed Under: Statement and Courses of Action
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Q:

Which of the following is a renewable source of energy

A) Natural gas B) Coal
C) Wind D) Oil
 
Answer & Explanation Answer: C) Wind

Explanation:

The energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out. Additionally, renewable energy sources are usually much more environmentally friendly than fossil fuels. Overall, they release very few chemicals, like carbon dioxide, that can harm the environment.


Most of this energy comes from fossil fuels, such as coal, oil, and natural gas. These are nonrenewable energy sources, which means that if we use them all up, we can never get more during our lifetime. Fossil fuels also contribute greatly to global climate change by releasing carbon dioxide into the air when they are burned.

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Filed Under: Physics
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Q:

The term fourth estate is used in reference to

A) The executive B) Parliament
C) Judiciary D) The Press and newspaper
 
Answer & Explanation Answer: D) The Press and newspaper

Explanation:
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Q:

Analog computer works on the supply of

A) Magnetic strength B) Continuous electrical pulses
C) Discontinuous electrical pulses D) None of the above
 
Answer & Explanation Answer: B) Continuous electrical pulses

Explanation:

Analog_computer_works_on_the_supply_of1557395703.jpg image

An analog computer or analogue computer is a type of computer that uses the continuously changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved.

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Q:

In beta decay what is emitted

A) electron B) proton
C) neutron D) All of the above
 
Answer & Explanation Answer: A) electron

Explanation:
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Filed Under: Physics
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