NEET · Biology doubts
340 doubts found
What does “Homologous vs analogous organs” actually mean in Evolution, and why does it matter for NEET?
homologous organs share structure but differ in function (common ancestry, divergent evolution); analogous organs share function but differ in structure (convergent evolution).
What does “Double circulation” actually mean in Body Fluids and Circulation, and why does it matter for NEET?
blood passes through the heart twice in one cycle -- a pulmonary circuit (heart-lungs) and a systemic circuit (heart-body).
I keep getting “Nerve impulse” questions wrong in Neural Control and Coordination. What's the trap?
thinking sodium is more concentrated inside the neuron at rest.
What does “Ten per cent law” actually mean in Ecosystem, and why does it matter for NEET?
only about 10% of the energy at one trophic level is passed on to the next; the rest is lost as heat and in respiration.
What does “Restriction enzymes” actually mean in Biotechnology - Principles and Processes, and why does it matter for NEET?
molecular scissors that cut DNA at a specific palindromic sequence, often leaving single-stranded sticky ends.
What does “Innate vs acquired immunity” actually mean in Human Health and Disease, and why does it matter for NEET?
innate immunity is non-specific and present from birth (skin, phagocytes); acquired immunity is specific and develops after exposure, with antibodies and memory.
I keep getting “Prokaryotic cell” questions wrong in Cell: The Unit of Life. What's the trap?
thinking prokaryotes have no DNA at all.
I keep getting “Enzyme specificity” questions wrong in Biomolecules. What's the trap?
assuming one enzyme can catalyse many unrelated reactions.
I keep getting “Mitosis” questions wrong in Cell Cycle & Cell Division. What's the trap?
expecting variation from mitosis.
I keep getting “Calvin cycle (dark reaction)” questions wrong in Photosynthesis in Higher Plants. What's the trap?
thinking the 'dark reaction' happens only at night.
I keep getting “Aerobic respiration” questions wrong in Respiration in Plants. What's the trap?
thinking Krebs cycle occurs in the cytoplasm.
I keep getting “Absorption” questions wrong in Digestion & Absorption. What's the trap?
thinking most absorption happens in the stomach.
I keep getting “Oxygen transport” questions wrong in Breathing & Exchange of Gases. What's the trap?
thinking oxygen mostly dissolves in the plasma.
I keep getting “Heart chambers” questions wrong in Body Fluids & Circulation. What's the trap?
mixing up which side carries oxygenated blood.
I keep getting “Urine formation” questions wrong in Excretory Products & Elimination. What's the trap?
thinking all the filtered fluid leaves as urine.
I keep getting “Nerve impulse” questions wrong in Neural Control & Coordination. What's the trap?
thinking the impulse jumps the synapse as electricity.
I keep getting “Insulin and glucagon” questions wrong in Chemical Coordination (Endocrine System). What's the trap?
swapping their roles.
I keep getting “Monohybrid ratio” questions wrong in Principles of Inheritance & Variation. What's the trap?
confusing the 3:1 phenotype ratio with the 1:2:1 genotype ratio.
I keep getting “Semi-conservative replication” questions wrong in Molecular Basis of Inheritance. What's the trap?
thinking both strands of the daughter DNA are brand new.
I keep getting “Variation and adaptation” questions wrong in Evolution. What's the trap?
thinking organisms change themselves on purpose to adapt.
I keep getting “Active vs passive immunity” questions wrong in Human Health & Disease. What's the trap?
calling a vaccine passive immunity.
I keep getting “Menstrual cycle” questions wrong in Human Reproduction & Reproductive Health. What's the trap?
thinking ovulation happens at the start of the cycle.
I keep getting “Restriction enzymes” questions wrong in Biotechnology & its Applications. What's the trap?
thinking restriction enzymes cut DNA at random points.
I keep getting “Ten percent law” questions wrong in Ecosystem & Ecology. What's the trap?
thinking most energy is transferred up the food chain.