NEET · Biology doubts
247 doubts found
I keep getting “Carbon dioxide transport” questions wrong in Breathing & Exchange of Gases. What's the trap?
thinking CO₂ is carried mainly by haemoglobin like oxygen.
I keep getting “Blood components” questions wrong in Body Fluids & Circulation. What's the trap?
thinking white cells carry oxygen.
I keep getting “Nitrogenous waste” questions wrong in Excretory Products & Elimination. What's the trap?
thinking humans excrete ammonia directly.
I keep getting “Reflex arc” questions wrong in Neural Control & Coordination. What's the trap?
thinking every response goes through the brain first.
I keep getting “Thyroxine” questions wrong in Chemical Coordination (Endocrine System). What's the trap?
thinking thyroid problems don't relate to diet.
I keep getting “Incomplete dominance” questions wrong in Principles of Inheritance & Variation. What's the trap?
confusing incomplete dominance with codominance.
I keep getting “Transcription” questions wrong in Molecular Basis of Inheritance. What's the trap?
confusing transcription (DNA→RNA) with translation (RNA→protein).
I keep getting “Hardy–Weinberg principle” questions wrong in Evolution. What's the trap?
thinking allele frequencies always drift over time.
I keep getting “Antibodies” questions wrong in Human Health & Disease. What's the trap?
thinking antibodies and antigens are the same thing.
I keep getting “Fertilisation” questions wrong in Human Reproduction & Reproductive Health. What's the trap?
thinking fertilisation occurs in the uterus.
I keep getting “PCR (polymerase chain reaction)” questions wrong in Biotechnology & its Applications. What's the trap?
confusing PCR (which amplifies DNA) with gel electrophoresis (which separates it).
I keep getting “Trophic levels” questions wrong in Ecosystem & Ecology. What's the trap?
forgetting decomposers, which recycle nutrients back to producers.
What does “Ribosomes” actually mean in Cell: The Unit of Life, and why does it matter for NEET?
tiny non-membrane-bound structures that build proteins.
What does “Carbohydrates” actually mean in Biomolecules, and why does it matter for NEET?
sugars and their polymers — the cell's quick energy source and structural material (cellulose).
What does “Crossing over” actually mean in Cell Cycle & Cell Division, and why does it matter for NEET?
the exchange of segments between homologous chromosomes during meiosis, creating variation.
What is the difference between light reaction and dark reaction?
The light reaction (thylakoid) needs light and makes ATP/NADPH + O₂; the dark reaction (stroma) fixes CO₂ into sugar using those products.
What does “ATP” actually mean in Respiration in Plants, and why does it matter for NEET?
the cell's energy currency, released and stored during respiration.
What does “Peristalsis” actually mean in Digestion & Absorption, and why does it matter for NEET?
the wave-like muscular contractions that push food along the gut.
What does “Mechanism of breathing” actually mean in Breathing & Exchange of Gases, and why does it matter for NEET?
the diaphragm and intercostal muscles change chest volume to draw air in and push it out.
What is the difference between artery and vein?
Arteries carry blood away from the heart under high pressure with thick walls; veins return blood to the heart at low pressure and have valves.
What does “ADH regulation” actually mean in Excretory Products & Elimination, and why does it matter for NEET?
antidiuretic hormone controls how much water is reabsorbed, concentrating the urine.
What is the difference between CNS and PNS?
The central nervous system is the brain and spinal cord (processing); the peripheral nervous system is the nerves connecting them to the body.
What does “Pituitary gland” actually mean in Chemical Coordination (Endocrine System), and why does it matter for NEET?
the 'master gland' that controls several other endocrine glands.
What does “Sex-linked inheritance” actually mean in Principles of Inheritance & Variation, and why does it matter for NEET?
genes on the X chromosome (like those for haemophilia and colour blindness) affect males more often.