NEET · Biology doubts
247 doubts found
I keep getting “Gas exchange” questions wrong in Breathing & Exchange of Gases. What's the trap?
thinking gases are actively pumped across the alveoli.
I keep getting “Double circulation” questions wrong in Body Fluids & Circulation. What's the trap?
thinking humans have single circulation like fish.
I keep getting “Nephron” questions wrong in Excretory Products & Elimination. What's the trap?
thinking the whole kidney filters as one unit.
I keep getting “Neuron” questions wrong in Neural Control & Coordination. What's the trap?
thinking the axon receives signals.
I keep getting “Hormones” questions wrong in Chemical Coordination (Endocrine System). What's the trap?
confusing endocrine glands with exocrine glands that use ducts.
I keep getting “Mendel's laws” questions wrong in Principles of Inheritance & Variation. What's the trap?
thinking both alleles blend rather than segregate.
I keep getting “DNA structure” questions wrong in Molecular Basis of Inheritance. What's the trap?
pairing adenine with guanine or cytosine.
I keep getting “Natural selection” questions wrong in Evolution. What's the trap?
reading it as 'survival of the strongest'.
I keep getting “Innate vs acquired immunity” questions wrong in Human Health & Disease. What's the trap?
thinking all immunity is present from birth.
I keep getting “Gametogenesis” questions wrong in Human Reproduction & Reproductive Health. What's the trap?
thinking oogenesis produces four functional eggs like spermatogenesis makes four sperm.
I keep getting “Recombinant DNA technology” questions wrong in Biotechnology & its Applications. What's the trap?
thinking any gene can be expressed without a proper vector and host.
I keep getting “Energy flow” questions wrong in Ecosystem & Ecology. What's the trap?
thinking energy is recycled like nutrients.
What does “Prokaryotic cell” actually mean in Cell: The Unit of Life, and why does it matter for NEET?
a cell without a membrane-bound nucleus or organelles — like bacteria.
What does “Enzyme specificity” actually mean in Biomolecules, and why does it matter for NEET?
each enzyme acts on a specific substrate, like a lock fitting only its key.
What does “Mitosis” actually mean in Cell Cycle & Cell Division, and why does it matter for NEET?
division that produces two genetically identical diploid daughter cells for growth and repair.
What does “Calvin cycle (dark reaction)” actually mean in Photosynthesis in Higher Plants, and why does it matter for NEET?
occurs in the stroma, fixing CO₂ into sugar using the ATP and NADPH from the light reactions.
What does “Aerobic respiration” actually mean in Respiration in Plants, and why does it matter for NEET?
the oxygen-using stages (Krebs cycle and electron transport chain) in mitochondria that yield most ATP.
What does “Absorption” actually mean in Digestion & Absorption, and why does it matter for NEET?
digested nutrients are absorbed mainly in the small intestine, whose villi hugely increase surface area.
What does “Oxygen transport” actually mean in Breathing & Exchange of Gases, and why does it matter for NEET?
most oxygen is carried by haemoglobin in red blood cells as oxyhaemoglobin.
What does “Heart chambers” actually mean in Body Fluids & Circulation, and why does it matter for NEET?
four chambers — two atria and two ventricles — keep oxygenated (left) and deoxygenated (right) blood separate.
What does “Urine formation” actually mean in Excretory Products & Elimination, and why does it matter for NEET?
ultrafiltration in the glomerulus, then selective reabsorption and secretion in the tubules.
What does “Nerve impulse” actually mean in Neural Control & Coordination, and why does it matter for NEET?
an electrical signal (action potential) travels within a neuron; a chemical signal crosses the synapse.
What does “Insulin and glucagon” actually mean in Chemical Coordination (Endocrine System), and why does it matter for NEET?
pancreatic hormones — insulin lowers blood glucose, glucagon raises it.
What does “Monohybrid ratio” actually mean in Principles of Inheritance & Variation, and why does it matter for NEET?
a cross of one trait gives a 3:1 phenotype ratio in the F2 generation.