Brain Science & Computer Memory Technologies

A byte is a unit of digital information consisting of 8 bits. This is a fundamental definition in computer science and data representation. Options like 10, 1024, and 1000 are incorrect - 1024 bytes make 1 kilobyte, not 1 byte.

GRAIN is an acronym representing four cutting-edge technologies: Genetics, Robotics, Artificial Intelligence, and Nanotechnology. It's closely related to GNR but explicitly includes AI as a distinct fourth category. Option B has a typo in 'Infrastructure'.

WREL stands for Wireless Resonant Energy Link, a technology that enables wireless power transfer through magnetic resonance coupling. This technology allows devices to charge wirelessly without direct contact by creating a resonant magnetic field between transmitter and receiver coils. The 'Wireless' and 'Resonant' components are key to understanding this technology.

T-RAM stands for Thyristor Random Access Memory, a type of memory technology that uses thyristor devices as storage elements. Thyristors are semiconductor devices that can act as bistable switches, making them suitable for memory applications. Triode and Transistor RAM are different memory types, and 'Tri polar Range Acceleration Magnet' is not a real technology term.

Aerobic exercises (cardiovascular exercise) are proven to be the most beneficial for brain health. They increase blood flow to the brain, stimulate neurogenesis, and improve cognitive functions like memory and executive function more effectively than strength or flexibility training.

All listed abilities - concentration, memory, and language - can be improved with age through training, practice, and lifestyle factors. The brain maintains neuroplasticity throughout life, so 'None' (meaning no ability is unimprovable) is correct.

The adult human brain typically weighs approximately 1.3-1.4 kilograms (about 3 pounds), not 2 kilograms. 2 kg would be significantly heavier than the actual average weight.

The skin weighs approximately 4-6 kg for an average adult, while the brain weighs about 1.3-1.4 kg. The skin does not weigh thrice as much as the brain - it's closer to 4-5 times heavier, not 3 times.

The brain receives approximately 750 ml of blood flow per minute, which is about 15-20% of the heart's total output. This high blood flow is necessary to meet the brain's high metabolic demands.

SONOS (Silicon-Oxide-Nitride-Oxide-Silicon) is a type of non-volatile memory technology used in flash memory devices. It consists of a layered structure where a nitride layer sandwiched between oxide layers traps electrical charge, enabling data storage without power. Option A refers to SONAR (sound navigation), while options C and D are not valid technical expansions.

When blood supply to the brain is completely interrupted (as in cardiac arrest), unconsciousness typically occurs within 8-10 seconds due to the rapid depletion of oxygen in cerebral tissues. The brain has minimal oxygen reserves and cannot sustain consciousness without continuous blood flow. Earlier timeframes (2-6 seconds) are too brief for complete oxygen depletion.

Although the brain represents only about 2% of body weight, it consumes approximately 20% of the body's total oxygen supply due to its high metabolic rate. This disproportionate oxygen usage reflects the brain's intense energy demands for neural signaling and maintaining cellular functions. Options A (10%) is too low, while C (30%) and D (80%) are too high.

TTRAM (Twin Transistor Random Access Memory) is a novel memory technology that uses two transistors per memory cell instead of the traditional one-transistor-one-capacitor (1T1C) DRAM design. The twin-transistor configuration improves data retention and reduces leakage current. Options A and D incorrectly use 'triode' (a vacuum tube term), while C says 'Triple' instead of 'Twin'.

The human brain is approximately 75% water by weight, similar to the water content of many other organs. This high water content is essential for biochemical reactions, nutrient transport, and maintaining cellular structure. Options A (10%) is far too low, B (50%) underestimates, and D (90%) is slightly too high for brain tissue.

Z-RAM (Zero Capacitor Random Access Memory) is a type of DRAM that uses the floating body effect of a transistor to store charge instead of a capacitor. Unlike options A and B that incorrectly suggest Z stands for 'zenith' or 'zinc', the Z specifically means 'zero' capacitor. Option C is incorrect because it misspells 'Access' as 'Access Memory'.