List of top Questions asked in NEET (UG)

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:

Which one of the following is an appropriate example of 'sexual deceit' ?

The JGA (Juxta Glomerular Apparatus) is a special sensitive region formed by cellular modifications in ________ related to the same nephron.

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 :

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:

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 $Ca^{++$ into sarcoplasm.
C. Increase in $Ca^{++}$ 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:}

The sixth mutant codon of beta globin gene causing polymerization of Haemoglobin and change in RBC shape is ________

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

Choose the correct 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

Choose the correct answer from the options given below :

Select the incorrect statements with reference to Rh grouping.
A. Erythroblastosis foetalis is a condition observed having foetus with $Rh^{-ve$ blood and mother with $Rh^{+ve}$ 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 $Rh^{-ve}$ and the foetus is $Rh^{+ve}$.
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:}

Which of the following equations depicts Verhulst-Pearl logistic population growth ?

Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are:

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 :

Select the set of fishes which belong to the class Osteichthyes :

The human protein named $\alpha$-1-antitrypsin, obtained from transgenic animals, is used for the treatment of ________.

Match List I with List II \begin{table}[h] \centering \begin{tabular}{|c|l|c|l|} \hline \multicolumn{2}{|c|}{List I (Drug)} & \multicolumn{2}{c|}{List II (Effect)}
\hline 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
\hline \end{tabular} \end{table} Choose the correct answer from the options given below:

Match List I with List II :

List I             List II
A. Progestasert    I. Barrier made of rubber used by females
B. Multiload 375   II. Oral contraceptive
C. Diaphragm       III. Hormone releasing IUD
D. Saheli          IV. Copper releasing IUD

Match List I with List II with respect to chronology of evolution of life forms :

List I             List II
A. About 65 mya    I. Jawless fish probably evolved
B. About 500 mya   II. The dinosaurs suddenly disappeared from the earth
C. About 350 mya   III. Seaweeds and few plants probably existed
D. About 320 mya   IV. Invertebrates were formed and became active

Choose the correct answer from the options given below :

A group of researchers procured some fish-like animals and upon investigation the following characters were observed:
A. Endoskeleton was made of cartilage.
B. Ectoparasitic; as they were found attached on fish skin with their circular sucking mouth.
C. Paired fins and scales are absent, but 7 pairs of gill slits were present.
Which of the following species of animals did they consider to fit best with these characters?

Male frogs can be distinguished from female frogs due to the presence of:
A. Bulging eyes
B. Vocal sacs
C. Webbed digits in feet
D. Copulatory pad on first digit of fore limbs
E. Olive green-coloured skin with dark irregular spots
Choose the correct answer from the options given below:

Which of the following is {not an example of convergent evolution?}

Match List I with List II :

List I (Respiratory Volume)     List II (Capacity in mL)
A. ERV (Expiratory Reserve Volume)   I. 2500 - 3000 mL
B. RV (Residual Volume)              II. 500 mL
C. IRV (Inspiratory Reserve Volume)  III. 1000 - 1100 mL
D. TV (Tidal Volume)                 IV. 1100 - 1200 mL

Choose the correct answer from the options given below :

What is the probability of having children with 'O' blood group, where both mother and father are heterozygous for 'A' and 'B' blood group, respectively ?

The specific receptors for neurotransmitters in a synapse are present on ________.

The following reaction depicts the activity of a particular class of enzymes :

X    Y
|    |
C - C → X - Y + C = C

(Substrate)      (Product)    (Product)

Identify the enzyme class 'E' from the following options :