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.
Subjectwise MCQ
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335 Biology GK MCQ question & Answer in English हिन्दी
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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