NEET UG Test Series

Choose the object and draw all external forces before applying Newton's second law. Acceleration is determined by the net force, not an isolated force. The relation F = ma applies to constant mass in an inertial frame.

Kinetic energy depends on mass and the square of speed. Work done by the net force equals the change in kinetic energy. Use joules for energy and distinguish speed from a signed velocity component.

For an ohmic resistor at fixed temperature, voltage equals current multiplied by resistance. Series resistances add, while parallel branches have the same voltage. Check circuit topology before substituting values.

Wave speed is the product of frequency and wavelength. Frequency counts cycles per second, while wavelength is a distance. When a wave crosses media its frequency is set by the source, but its speed and wavelength may change.

Photon energy is proportional to frequency through Planck's constant. In the photoelectric effect, energy first overcomes the work function and the remainder becomes maximum electron kinetic energy. Below threshold, increasing intensity does not cause emission.

Convert the supplied mass to moles using molar mass before applying a balanced reaction. Coefficients express mole ratios, not arbitrary mass ratios. Keep the chemical identity and units visible throughout a stoichiometric calculation.

Molarity is moles of solute per litre of solution. Use the final solution volume, not merely the solvent volume. For a dilution without reaction, the number of moles of solute remains constant.

Atomic number counts protons and identifies the element. Mass number is the sum of protons and neutrons in a specified isotope. Ion formation changes electron count, whereas isotopes differ in neutron number.

At constant pressure, enthalpy change equals heat transferred for a process with only pressure-volume work. A negative enthalpy change is exothermic. For Gibbs energy, use consistent energy units and temperature in kelvin.

Acyclic saturated hydrocarbons contain only carbon-carbon single bonds and follow the alkane formula CnH2n+2. Rings or multiple bonds reduce the hydrogen count, so check structural assumptions before applying the formula.

Identify each organelle by its structure and function. Eukaryotic cells compartmentalise reactions, while prokaryotes lack a membrane-bound nucleus. Track chromosome number separately from DNA content during the cell cycle.

Connect plant processes with their location and energy source. Light reactions produce ATP and NADPH in chloroplast thylakoids. Carbon fixation occurs in the stroma, while vascular tissues transport water and organic solutes.

Distinguish genotype from phenotype and state the assumptions behind a genetic ratio. Follow complementary base pairing in DNA and remember that transcription produces RNA whereas translation produces a polypeptide.

Relate flower structures to gamete formation and fertilisation. Angiosperms show double fertilisation: one male gamete fuses with the egg and the other with the central cell. Compare plant groups using vascular tissue and seed formation.

Distinguish the roles of producers, consumers and decomposers. Energy flows through ecosystems and is dissipated as heat, while nutrients cycle. Population interactions can benefit, harm or leave a partner largely unaffected.

Trace blood flow through the heart, lungs and body before naming vessels. Gas exchange occurs by diffusion down partial-pressure gradients. Haemoglobin transports most oxygen, whereas most carbon dioxide travels as bicarbonate.

Match enzymes with their substrates and sites of action. Digestion breaks macromolecules into absorbable units. In a nephron, filtration is followed by selective reabsorption and secretion, which adjust urine composition.

Follow the direction of information flow through a neuron and distinguish electrical impulses from chemical signalling. Endocrine hormones travel through blood and act on cells with suitable receptors, often under feedback control.

Connect gamete formation with the organs and hormones involved. Fertilisation normally occurs in the oviduct; implantation follows embryonic development and transport to the uterus. The placenta supports exchange and endocrine functions.

Distinguish innate barriers from specific acquired immunity. Antibodies are produced by differentiated B cells, while natural selection changes population traits over generations when heritable variation affects reproductive success.