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335 Biology GK MCQ question & Answer in English हिन्दी
Biology is the science that studies life and its physicochemical processes. The research is separated into numerous branches for convenience, including botany, zoology, morphology, etc. Let's do a fun quiz about life science that will help us better our knowledge and prepare for competitive exams.
Which blood component helps fight infections?
WBCs (Leukocytes) are responsible for immune defense.
What does GPU stand for?
Graphics Processing Unit — handles rendering and visual tasks.
Which of these is non-volatile memory?
ROM — retains data even when power is off.
CPU — executes instructions and processes data.
Random Access Memory — volatile memory used for current tasks.
Restriction enzymes are used to:
Restriction enzymes — create DNA fragments.
Restriction enzymes are used to:
Restriction enzymes — create DNA fragments.
CRISPR/Cas9 is used for:
Gene editing — targeted DNA modifications.
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Gel electrophoresis separates biomolecules by:
Size and charge — fragments move through agarose.
An ELISA test detects:
Antibodies/antigens — used for diagnosis (e.g., HIV).
HIV primarily targets:
CD4⁺ T cells — leading to immune deficiency.
Autoimmune disease occurs when:
Self-reactive immune response.
Vaccines typically contain:
Antigens or attenuated pathogen — to trigger immune memory.
Antibodies are produced by:
B cells — they release immunoglobulins.
ATP is composed of adenine, ribose, and:
Three phosphates — energy-rich bonds.
Enzyme activity can be denatured by:
High heat — disrupts protein structure.
Lipids are hydrophobic because of:
Hydrocarbon tails — repel water.
Peptide bonds link:
Amino acids — forming proteins.
Monosaccharides are:
Simple sugars like glucose.
Binomial nomenclature includes:
Genus and species — e.g., Homo sapiens.
Which is not a chordate characteristic?
Exoskeleton — chordates have internal skeleton.
Phylum Arthropoda is characterized by:
Jointed appendages and exoskeleton.
Which kingdom includes decomposers like mushrooms?
Fungi — absorb nutrients from organic material.
Rhizobium bacteria in root nodules fix:
Nitrogen — converts atmospheric N₂ to ammonia.
Biomagnification refers to:
Toxin buildup at higher trophic levels.
A keystone species is one that:
Shapes ecosystem structure significantly.
Primary succession begins with:
Bare rock — lichens and mosses colonize first.
Neurons communicate via:
Electrical and chemical — action potentials + neurotransmitters.
Which organ produces bile?
Liver — bile aids fat digestion.
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