NEET doubts
500 doubts found
I keep getting “Peristalsis” questions wrong in Digestion & Absorption. What's the trap?
thinking gravity moves food through the gut.
I keep getting “Mechanism of breathing” questions wrong in Breathing & Exchange of Gases. What's the trap?
thinking the lungs themselves have muscles that pump air.
What is the difference between RBC and WBC?
Red blood cells carry oxygen (no nucleus in humans); white blood cells defend against infection (have a nucleus).
I keep getting “ADH regulation” questions wrong in Excretory Products & Elimination. What's the trap?
thinking urine concentration is fixed.
What is the difference between sensory neuron and motor neuron?
A sensory neuron carries signals from receptors to the CNS; a motor neuron carries commands from the CNS to muscles/glands.
I keep getting “Pituitary gland” questions wrong in Chemical Coordination (Endocrine System). What's the trap?
thinking each gland works fully independently.
I keep getting “Sex-linked inheritance” questions wrong in Principles of Inheritance & Variation. What's the trap?
thinking sex-linked traits affect both sexes equally.
I keep getting “Translation” questions wrong in Molecular Basis of Inheritance. What's the trap?
thinking each base codes for one amino acid.
What is the difference between natural selection and Lamarckism?
Natural selection acts on inherited variation over generations; Lamarckism (disproved) claimed traits acquired in life are passed on.
I keep getting “Antibiotics” questions wrong in Human Health & Disease. What's the trap?
taking antibiotics for a viral cold or flu.
I keep getting “Placenta” questions wrong in Human Reproduction & Reproductive Health. What's the trap?
thinking maternal and foetal blood mix directly.
I keep getting “Applications” questions wrong in Biotechnology & its Applications. What's the trap?
thinking genetically engineered insulin differs from human insulin.
I keep getting “Food chain vs food web” questions wrong in Ecosystem & Ecology. What's the trap?
assuming each organism eats only one type of food.
What does “Cell membrane” actually mean in Cell: The Unit of Life, and why does it matter for NEET?
a selectively permeable boundary described by the fluid-mosaic model.
What does “Nucleic acids” actually mean in Biomolecules, and why does it matter for NEET?
DNA and RNA, the molecules that store and carry genetic information.
What is the difference between mitosis and meiosis?
Mitosis gives 2 identical diploid cells (growth/repair); meiosis gives 4 varied haploid cells (gametes).
What is the difference between photosynthesis and respiration?
Photosynthesis stores energy by making glucose and releasing O₂; respiration releases that energy by breaking glucose and using O₂.
What is the difference between aerobic respiration and anaerobic respiration?
Aerobic respiration uses oxygen and yields ~36–38 ATP per glucose; anaerobic (fermentation) needs no oxygen and yields only ~2 ATP.
What is the difference between villi and microvilli?
Villi are finger-like folds of the intestinal wall; microvilli are much smaller projections on each villus cell — together they maximise absorption area.
What is the difference between breathing and cellular respiration?
Breathing is the physical movement of air in and out; cellular respiration is the chemical release of energy from glucose inside cells.
What is the difference between systole and diastole?
Systole is heart-muscle contraction (pumping blood out); diastole is relaxation (chambers refill).
What is the difference between ultrafiltration and reabsorption?
Ultrafiltration pushes water and small solutes out of the blood in the glomerulus; reabsorption takes back the useful ones in the tubule.
What is the difference between resting potential and action potential?
Resting potential is the neuron's charged 'ready' state (about −70 mV); an action potential is the brief reversal that carries the impulse.
What is the difference between endocrine gland and exocrine gland?
Endocrine glands are ductless and release hormones into the blood; exocrine glands (sweat, salivary) release secretions through ducts.