General Science Topics
Undergraduate level — General Science
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Physics Basics
Chemistry Basics
Biology Basics
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Environment & Ecology
quiz Questions
Q101
Which of the following diseases is caused by a protozoan parasite and is mechanically transmitted to humans by the bite of an infected female Anopheles mosquito?
Dengue
Malaria
Chikungunya
Filariasis
Explanation
Malaria is caused by Plasmodium, a single-celled protozoan parasite. The female Anopheles mosquito acts as a biological vector that transmits the parasite into human blood during a bite.
Q102
What is the specialized function of a 'Modem' in telecommunication and network computing hardware structures?
To systematically scan and clean structural malware loops
To convert digital signals to analog and vice versa
To scale down high-voltage AC inputs across local server stacks
To amplify electromagnetic sound waves within fiber optical conduits
Explanation
A modem (Modulator-Demodulator) converts digital data from a computer into an analog signal for transmission over telephone or cable lines, and vice versa.
Q103
Which of the following biological metrics is considered an absolute indicator of the overall species richness and ecosystem health within a local environmental grid?
Total Biomass Yield
Species Richness
Trophic Level Multiplier
Carbon Sequestration Depth
Explanation
Biodiversity indices, particularly species richness, measure the total count of different unique species occupying an ecological space, reflecting structural stability and resilience.
Q104
The total resistance of two identical resistors connected in a parallel configuration is 4 Ohms. What is the individual resistance of each resistor?
2 Ohms
4 Ohms
8 Ohms
16 Ohms
Explanation
For two identical resistors R in parallel, the equivalent resistance Rp = R / 2. Given Rp = 4 Ohms, we get R = 4 × 2 = 8 Ohms.
Q105
Which chemical element belongs to Group 17 of the Periodic Table and exists as a solid dark-violet crystalline non-metal at room temperature?
Fluorine
Chlorine
Iodine
Astatine
Explanation
Iodine is a halogen (Group 17) that forms shiny, dark-violet or black crystals at room temperature and undergoes sublimation upon heating to yield a violet gas.
Q106
The human spinal cord is protected structurally by which anatomical column framework?
Rib Cage Matrix
Vertebral Column
Pelvic Girdle Frame
Sternum Plate
Explanation
The spinal cord is a delicate tube-like structure extending from the brainstem down the center of the spine, protected completely within the bony vertebral column.
Q107
An ideal heat engine works between two thermal reservoirs maintained at 600 K and 300 K. What is the maximum theoretical efficiency of this thermodynamic machine?
25 percent
33.3 percent
50 percent
75 percent
Explanation
The efficiency of a Carnot engine is given by η = 1 - (TL / TH). Substituting the given values: η = 1 - (300 / 600) = 1 - 0.5 = 0.5 or 50%.
Q108
Which of the following organic functional groups defines the chemical family of Aldehydes and is always positioned at the terminal end of a carbon chain?
-OH (Hydroxyl group)
-CHO (Formyl group)
-COOH (Carboxyl group)
-CO- (Carbonyl group)
Explanation
The aldehyde functional group is -CHO, consisting of a carbonyl center double-bonded to oxygen and single-bonded to hydrogen. Because of the hydrogen atom, it always occupies a terminal position.
Q109
Which specialized cell junction found inside animal tissues serves as an absolute barrier to block the leakage of water and dissolved ions between adjacent cell membranes?
Gap Junctions
Tight Junctions
Desmosomes
Plasmodesmata
Explanation
Tight junctions (zonula occludens) firmly seal adjacent epithelial cells together directly below their apical surface, preventing any movement of molecules through the extracellular space between cells.
Q110
What type of cryptographic technology utilizes a distributed ledgers system across an immutable peer-to-peer network to securely log digital assets like cryptocurrencies?
Centralized Cloud Indexing
Blockchain Technology
Asynchronous Core Tunneling
Quantum Key Demultiplexing
Explanation
Blockchain technology securely bundles transactional data chronologically into cryptographic blocks, replicating them identically across an independent distributed node matrix to avoid single-point data tempering.