General Science and Technology Quiz

OEM stands for Original Equipment Manufacturer. It refers to a company that produces parts or equipment that may then be marketed by another manufacturer. The other options like 'Out', 'Object', or 'Operator' are incorrect in the context of this standard industry acronym.

POST stands for "Power On Self Test," a diagnostic sequence that runs when a computer boots. The O represents "On," as in powering on the system to begin the diagnostic check.

XOR stands for "Exclusive OR," a logical operation that outputs true only when inputs differ. The O represents "Or," making it a specific type of OR operation in Boolean logic.

Sir C.V. Raman was the first Indian scientist to receive the Nobel Prize in Physics in 1930 for his discovery of the Raman Effect. While S. Chandrasekhar also won a Nobel, he did so in 1983. Homi Bhabha and S.N. Bose were influential scientists but did not receive the Nobel Prize.

Raja Ramanna was the key figure instrumental in staging India's first nuclear explosion at Pokhran in 1974, known as Operation Smiling Buddha. As director of BARC (Bhabha Atomic Research Centre), Ramanna led the nuclear weapons program. While Dr. APJ Abdul Kalam was involved as the project coordinator for the delivery system, Ramanna was the primary scientific leader.

Subrahmanyan Chandrasekhar (Dr. S. Chandrasekhar) won the Nobel Prize in Physics in 1983 for his theoretical studies of the physical processes of importance to the structure and evolution of the stars. C.V. Raman won it much earlier in 1930. S.N. Bose and J.C. Bose never received the Nobel Prize.

Homi J. Bhabha was the first Chairman of the Atomic Energy Commission of India, established in 1948. He is widely regarded as the father of the Indian nuclear program and played a pivotal role in developing India's nuclear capabilities.

Hargobind Khorana won the Nobel Prize in Physiology or Medicine in 1968 for his work on interpreting the genetic code and its function in protein synthesis. He shared the prize with Marshall Nirenberg and Robert Holley.

The human brain reaches approximately 90-95% of its adult size by age 6, and by age 13 it weighs about 1.3-1.4 kg, which is very close to the adult brain weight. The brain doesn't grow significantly in size after early childhood - development is mostly in connectivity and myelination.

An adult human brain weighs approximately 1.3-1.4 kg (about 3 pounds). Despite being only 2% of body weight, it consumes about 20% of the body's energy. The other options are either too low (900gm is a child's brain weight) or too high (2-2.5kg would be extremely large for a human brain).

The human brain contains approximately 86-100 billion neurons (100,000 million is the closest option). Option C (1 billion) is far too few - even a fruit fly has about 100,000 neurons. The actual number is in the tens of billions, making D the only reasonable answer among the choices.

The blue whale has the largest brain of any animal, weighing about 6 kg (15 pounds). However, brain size doesn't directly correlate with intelligence - dolphins and humans have higher brain-to-body mass ratios (encephalization quotient). T-Rex (A) is extinct, elephants have large brains (about 5 kg), and human brains average 1.4 kg.

Einstein's brain was actually slightly smaller than the average male brain (about 1,230 grams vs 1,400 grams average). However, it had unique features in certain areas related to mathematical and spatial reasoning. This shows that intelligence correlates more with neural organization and connectivity than absolute brain size.

About 1 liter of blood flows through the brain per minute (around 750 ml/min, but 1 liter is the closest option). The brain receives about 15-20% of the heart's output despite being only 2% of body weight. Option A (per second) would be 60 liters/minute - impossibly high. Option D (per millisecond) is absurdly impossible.

The brain consumes approximately 20% (one-fifth) of the body's total energy intake, despite representing only 2% of body weight. This is because neurons are extremely energy-intensive, constantly maintaining electrical gradients and transmitting signals. The brain runs almost exclusively on glucose and cannot use other fuels effectively.

Neurons are the specialized cells that transmit electrical and chemical signals in the brain. They form the fundamental working units of the nervous system, responsible for processing and transmitting information through electrochemical impulses.

Ancient Egyptians believed the heart was the center of intelligence, emotion, and personality. During mummification, the brain was often discarded through the nose while the heart was carefully preserved for the afterlife.

Oology is the branch of zoology that studies eggs, particularly bird eggs. Since none of A, B, or C mention eggs, 'None of the above' is correct.