NEET doubts
500 doubts found
What is the difference between genotype and phenotype?
Genotype is the genetic makeup (e.g. Tt); phenotype is the visible trait it produces (e.g. tall).
What is the difference between codon and anticodon?
A codon is a triplet of bases on mRNA that codes for an amino acid; an anticodon is the complementary triplet on tRNA that reads that codon.
What is the difference between divergent evolution and convergent evolution?
Divergent evolution makes related species differ (homologous organs); convergent evolution makes unrelated species resemble each other (analogous organs).
What is the difference between innate immunity and acquired immunity?
Innate immunity is fast and non-specific (skin, phagocytes); acquired immunity is slower, specific, and has memory (antibodies).
What is the difference between spermatogenesis and oogenesis?
Spermatogenesis produces four equal functional sperm; oogenesis produces one large ovum and small polar bodies.
What is the difference between PCR and gel electrophoresis?
PCR amplifies a DNA segment into many copies; gel electrophoresis separates DNA fragments by size using an electric field.
What is the difference between food chain and food web?
A food chain is a single linear feeding sequence; a food web is many interconnected chains showing all feeding relationships.
I keep getting “Cell membrane” questions wrong in Cell: The Unit of Life. What's the trap?
thinking the membrane lets everything pass freely.
I keep getting “Nucleic acids” questions wrong in Biomolecules. What's the trap?
thinking RNA cannot store genetic information (some viruses use RNA).
What is the difference between haploid and diploid?
Haploid (n) cells have one set of chromosomes (gametes); diploid (2n) cells have two sets (body cells).
How is Photosynthesis in Higher Plants tested in NEET, and what should I focus on?
Prioritise the core ideas: Light reactions, Calvin cycle (dark reaction), Chlorophyll.
What is the difference between glycolysis and Krebs cycle?
Glycolysis splits glucose to pyruvate in the cytoplasm (no O₂ needed); the Krebs cycle oxidises it fully in the mitochondria (aerobic).
What is the difference between pepsin and trypsin?
Pepsin digests protein in the acidic stomach; trypsin digests protein in the alkaline small intestine.
What is the difference between inspiration and expiration?
In inspiration the diaphragm contracts and chest volume rises to pull air in; in expiration it relaxes and air is pushed out.
How is Body Fluids & Circulation tested in NEET, and what should I focus on?
Prioritise the core ideas: Double circulation, Heart chambers, Blood components.
What is the difference between ureotelic and uricotelic?
Ureotelic animals (mammals) excrete urea; uricotelic animals (birds, reptiles) excrete uric acid to save water.
How is Neural Control & Coordination tested in NEET, and what should I focus on?
Prioritise the core ideas: Neuron, Nerve impulse, Reflex arc.
What is the difference between insulin and glucagon?
Insulin lowers blood glucose by promoting storage; glucagon raises it by releasing stored glucose — they are antagonists.
What is the difference between homozygous and heterozygous?
Homozygous means two identical alleles (TT or tt); heterozygous means two different alleles (Tt).
What is the difference between transcription and translation?
Transcription makes mRNA from DNA in the nucleus; translation makes protein from mRNA at the ribosome.
How is Evolution tested in NEET, and what should I focus on?
Prioritise the core ideas: Natural selection, Variation and adaptation, Hardy–Weinberg principle.
What is the difference between active immunity and passive immunity?
Active immunity is made by your own body (vaccine, infection) and lasts long; passive immunity is borrowed antibodies (mother's milk, antivenom) and is short-lived.
What is the difference between menstrual phase and ovulation?
The menstrual phase is the shedding of the uterine lining at the cycle's start; ovulation is the release of the egg around mid-cycle.
What is the difference between restriction enzyme and DNA ligase?
A restriction enzyme cuts DNA at specific sites; DNA ligase joins DNA fragments together — the scissors and the glue.