Practice authentic previous years' questions for Physics, Chemistry, Botany, and Zoology with step-by-step NCERT-aligned solutions and full-width diagram references.
Marking pattern: +4.00 positive, -1.00 negative (Official NTA NEET Scheme).
Match List I with List II:
| List I (Drug) | List II (Effect) |
|---|---|
| A. Nicotine | I. Causes sense of euphoria and increased energy |
| B. Morphine | II. Stimulates adrenal gland to release catecholamines into blood circulation |
| C. Heroin | III. Effective sedative and painkiller |
| D. Cocaine | IV. A depressant; slows down body function |
The human protein named Ξ±-1-antitrypsin, obtained from transgenic animals, is used for the treatment of
Select the set of fishes which belong to the class Osteichthyes:
Select the incorrect statements from the following:
A. Digestive system in Platyhelminthes is incomplete.
B. Bilateral symmetry is a characteristic feature of adult Echinoderms.
C. Pseudocoelom is possessed by Aschelminthes.
D. Notochord is persistent throughout life in the class Chondrichthyes.
E. Members of class Reptilia maintain a constant body temperature.
Choose the answer from the options given below:
Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are
Which of the following equations depicts Verhulst-Pearl logistic population growth?
Select the incorrect statement with reference to Rh grouping.
A. Erythroblastosis foetalis is a condition observed having foetus with Rhβ» blood and mother with RhβΊ blood.
B. Rh antigen is observed on RBCs in the majority of human beings.
C. Before blood transfusion, Rh group should also be matched.
D. Rh incompatibility is observed when a pregnant mother is Rhβ» and the foetus is RhβΊ.
E. Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the second child.
Choose the answer from the options given below:
Match List I with List II:
| List I (Bioactive molecules) | List II (Importance) |
|---|---|
| A. Streptokinase | I. Immunosuppressive agent |
| B. Statins | II. Removal of clots from the blood vessels |
| C. Lipases | III. Blood cholesterol-lowering agent |
| D. Cyclosporin A | IV. Detergent formulations |
Match List I with List II:
| List I | List II |
|---|---|
| A. Molluscs | I. Pulmonary respiration only |
| B. Reptiles | II. Branchial respiration |
| C. Adult amphibians | III. Cellular respiration |
| D. Amoeba | IV. Pulmonary and cutaneous respiration |
The sixth mutant codon of beta globin gene causing polymerization of Haemoglobin and change in RBC shape is
Choose the correct statements regarding muscle contraction.
A. A motor neuron carries a signal sent by the Central Nervous System (CNS) to the sarcolemma of the muscle fibre.
B. The neural signal generates an action potential which causes the release of CaβΊβΊ into sarcoplasm.
C. Increase in CaβΊβΊ inactivates the actin for breaking cross bridges.
D. Actin binds to the myosin head to form a cross bridge.
E. Shortening of sarcomere takes place, by pulling actin filaments towards the centre of 'A' band.
Choose the correct answer from the options given below :
Which of the following statements are correct with reference to human endoskeleton?
A. Human skull is monocondylic.
B. The joint between any two adjoining vertebrae is a cartilaginous joint.
C. In human beings, the number of cervical vertebrae is seven.
D. All ribs except the last 2 pairs are bicephalic.
E. The occipital bone of skull is articulated with atlas vertebra.
Choose the correct answer from the options given below:
Spermatogonia undergo a series of cell divisions to produce sperms. Select the correct statements from the following:
A. Spermatogonia always undergo meiotic cell division.
B. Primary spermatocytes divide mitotically to produce secondary spermatocytes.
C. Secondary spermatocytes, through their second meiotic division, produce haploid spermatids.
D. Spermatids produce spermatozoa through mitosis.
E. Spermatids transform into spermatozoa by spermiogenesis.
Choose the correct answer from the options given below:
The JGA (Juxta Glomerular Apparatus) is a special sensitive region formed by cellular modifications in related to the same nephron.
Which one of the following is an appropriate example of sexual deceit?
Choose the correct statements regarding frog's anatomy:
A. Hepatic portal system is the special venous connection between liver and intestine.
B. There are twelve pairs of cranial nerves arising from the brain.
C. The ureters and oviducts open separately into the cloaca in female frogs.
D. Hind-brain consists of cerebellum, medulla oblongata and optic lobes.
E. Sinus venosus joins the right atrium of heart.
Choose the correct answer from the options given below:
Match List I with List II related to embryonic development at various months of pregnancy:
| List-I | List-II |
|---|---|
| A. The foetus movement starts and hair appears on the head | I. 24 weeks of pregnancy |
| B. The foetus develops limbs and digits | II. 20 weeks of pregnancy |
| C. The foetus develops external genital organs | III. 8 weeks of pregnancy |
| D. The foetus body is covered with fine hair; eyelids separate and eyelashes are formed | IV. 12 weeks of pregnancy |
In a population of a grasshopper species, the chromosome number of some members is 23 and some other members possess 24 chromosomes. The 23 and 24 chromosome-bearing members in this species are
In which animal do haploid cells divide mitotically to produce gametes?
Arrange the following cell layers/structures around the female gamete, from outer to inner side:
A. Zona pellucida
B. Perivitelline space
C. Corona radiata
D. Plasma membrane of ovum
Choose the correct answer from the options given below:
What is the reason behind production of large holes in 'Swiss Cheese'?
The toxin proteins isolated from Bacillus thuringiensis, coded by which of the following genes would control cotton bollworms and corn borer, respectively?
Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:
Choose the correct statement regarding GIFT to overcome infertility.
Choose the correct statements regarding cell organelles and their inclusions.
A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.
B. Rough endoplasmic reticulum bears ribosomes on its surface.
C. Both mitochondria and plastids have circular DNA.
D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.
E. Mitochondrion is a single membrane-bound structure.
Choose the correct answer from the options given below: