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- Question
Which discovery is attributed to Phoebus Levene?
Options- 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
- Correct Answer
- identification of ribose and deoxyribose
ExplanationPhoebus 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.
- 1. The two purines in DNA are
Options- A. Adenine & Thymine
- B. Thymine & Uracil
- C. Guanine & Uracil
- D. Adenine & Guanine Discuss
- 2. BOND-I is given by which institution?
Options- A. IMF
- B. RBI
- C. ADB
- D. World Bank Discuss
- 3. Roentgen discovered
Options- A. Electrocardiograph
- B. X?rays
- C. Anti polio vaccine
- D. Encephalograph Discuss
- 4. A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
Options- A. greater than the weight of the man
- B. less than the weight of the man
- C. Same as the weight of the man
- D. Zero Discuss
- 5. Which of the following is a characteristic of an exothermic reaction?
Options- A. Release of heat
- B. Absorption of heat
- C. Doesn't involve any change in temperature
- D. None of the option is correct Discuss
- 6. In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. When the kerosene burned, the fuel in the tank below would be __________ pressure, and __________ a small circular flame would appear in the burner. The valve had tobe opened to let more kerosene vapour to the burner and pumping resumed. With the increase in pressure, the burner flame would spread _________ a loud noise. Tolower the flame, the valve had to be _________ opened to reduce the pressure and then tightened until the desired flame size was achieved. _________ you wanted theflame to be bigger, you had to hit the piston again. Pump stoves are still in vogue. was achieved. _________ you wanted the flame
Options- A. If
- B. Nor
- C. So
- D. Thus Discuss
- 7. Which is longest railway station ? Discuss
- 8. Which of the following is true of osmosis?
Options- A. it is a type of diffusion
- B. movement is against water's concentration gradient
- C. requires energy
- D. All of the above Discuss
- 9. Stan Lee, who passed away recently, was a comic writer with which of the following comic works was he as associated?
Options- A. Science fiction Comics
- B. Action/Adventur Comics
- C. Manga Comics
- D. Superhero Comics Discuss
- 10. What Frank Whittle invented?
Options- A. Radar
- B. Ethyl gasoline
- C. Sonar
- D. Jet propulsion Discuss
More questions
Correct Answer: Adenine & Guanine
Explanation:
The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.
Correct Answer: World Bank
Explanation:
The World Bank launched bond-I.
Correct Answer: X?rays
Correct Answer: greater than the weight of the man
Explanation:
The weight of the man mg is acting on the floor. As the lift is moving up with an acceleration, say a, the man too in it is having this acceleration. The force producing this acceleration is ma. By Newton's third law, this force will have an equal reaction pressing the floor equal to ma. Therefore the total resultant reaction on the floor is mg+ma = m(g+a) which is mg, the weight of the man. So (a) is correct.
Correct Answer: Release of heat
Correct Answer: If
Correct Answer: Grand Central Terminal, Chicago(USA)
Correct Answer: All of the above
Correct Answer:
Explanation:
Stan Lee, the legendary writer, editor and publisher of Marvel Comics whose fantabulous but flawed creations made him a real-life superhero to comic book lovers everywhere, has died.
Correct Answer: Jet propulsion
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