MCQOPTIONS
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MCQOPTIONS
This section includes 197 Mcqs, each offering curated multiple-choice questions to sharpen your NEET-UG knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly |
| A. | 1.25 |
| B. | 1.59 |
| C. | 1.69 |
| D. | 1.78 |
| Answer» E. | |
| 102. |
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves : |
| A. | Cells |
| B. | Potential gradients |
| C. | A condition of no current flow through the galvanometer |
| D. | A combination of cells, galvanometer and resistances |
| Answer» D. A combination of cells, galvanometer and resistances | |
| 103. |
The similarity of bone structure in the forelimbs of many vertebrates is an example of |
| A. | Convergent evolution |
| B. | Analogy |
| C. | Homology |
| D. | Adaptive radiation |
| Answer» D. Adaptive radiation | |
| 104. |
Among the following sets of examples for divergent evolution, select the incorrect option : |
| A. | Brain of bat, man and cheetah |
| B. | Heart of bat, man and cheetah |
| C. | Forelimbs of man, bat and cheetah |
| D. | Eye of octopus, bat and man |
| Answer» E. | |
| 105. |
Which of the following is not an autoimmune disease? |
| A. | Alzheimers disease |
| B. | Rheumatoid arthritis |
| C. | Psoriasis |
| D. | Vitiligo |
| Answer» B. Rheumatoid arthritis | |
| 106. |
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels? |
| A. | Ringworm disease |
| B. | Ascariasis |
| C. | Elephantiasis |
| D. | Amoebiasis |
| Answer» D. Amoebiasis | |
| 107. |
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as |
| A. | Plastidome |
| B. | Polyhedral bodies |
| C. | Polysome |
| D. | Nucleosome |
| Answer» D. Nucleosome | |
| 108. |
Which of the following events does not occur in rough endoplasmic reticulum? |
| A. | Cleavage of signal peptide |
| B. | Protein glycosylation |
| C. | Protein folding |
| D. | Phospholipid synthesis |
| Answer» E. | |
| 109. |
Which of the following terms describe human dentition? |
| A. | Pleurodont, Monophyodont, Homodont |
| B. | Thecodont, Diphyodont, Heterodont |
| C. | Thecodont, Diphyodont, Homodont |
| D. | Pleurodont, Diphyodont, Heterodont |
| Answer» C. Thecodont, Diphyodont, Homodont | |
| 110. |
Nissl bodies are mainly composed of |
| A. | Nucleic acids and SER |
| B. | DNA and RNA |
| C. | Proteins and lipids |
| D. | Free ribosomes and RER |
| Answer» E. | |
| 111. |
Calcium is important in skeletal muscle contraction because it |
| A. | Detaches the myosin head from the actin filament. |
| B. | Activates the myosin ATPase by binding to it. |
| C. | Binds to troponin to remove the masking of active sites on actin for myosin. |
| D. | Prevents the formation of bonds between the myosin cross bridges and the actin filament. |
| Answer» D. Prevents the formation of bonds between the myosin cross bridges and the actin filament. | |
| 112. |
Which of the following is an occupational respiratory disorder? |
| A. | Botulism |
| B. | Silicosis |
| C. | Anthracis |
| D. | Emphysema |
| Answer» C. Anthracis | |
| 113. |
Which of the following gastric cells indirectly help in erythropoiesis? |
| A. | Goblet cells |
| B. | Mucous cells |
| C. | Chief cells |
| D. | Parietal cells |
| Answer» E. | |
| 114. |
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA? |
| A. | ACCUAUGCGAU |
| B. | UGGTUTCGCAT |
| C. | AGGUAUCGCAU |
| D. | UCCAUAGCGUA |
| Answer» D. UCCAUAGCGUA | |
| 115. |
According to Hugo de Vries, the mechanism of evolution is |
| A. | Phenotypic variations |
| B. | Saltation |
| C. | Multiple step mutations |
| D. | Minor mutations |
| Answer» C. Multiple step mutations | |
| 116. |
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by |
| A. | Only grandchildren |
| B. | Only sons |
| C. | Only daughters |
| D. | Both sons and daughters |
| Answer» E. | |
| 117. |
All of the following are part of an operon except |
| A. | an enhancer |
| B. | structural genes |
| C. | an operator |
| D. | a promoter |
| Answer» B. structural genes | |
| 118. |
Which part of poppy plant is used to obtain the drug “Smack”? |
| A. | Roots |
| B. | Latex |
| C. | Flowers |
| D. | Leaves |
| Answer» C. Flowers | |
| 119. |
In a growing population of a country, |
| A. | reproductive and pre-reproductive individuals are equal in number |
| B. | reproductive individuals are less than the post-reproductive individuals. |
| C. | pre-reproductive individuals are more than the reproductive individuals. |
| D. | pre-reproductive individuals are less than the reproductive individuals. |
| Answer» D. pre-reproductive individuals are less than the reproductive individuals. | |
| 120. |
All of the following are included in ‘ex-situ conservation’ except |
| A. | Botanical gardens |
| B. | Sacred groves |
| C. | Wildlife safari parks |
| D. | Seed banks |
| Answer» C. Wildlife safari parks | |
| 121. |
Which one of the following population interactions is widely used in medical science for the production of antibiotics? |
| A. | Parasitism |
| B. | Mutualism |
| C. | Commensalism |
| D. | Amensalism |
| Answer» E. | |
| 122. |
Which of the following organisms are known as chief producers in the oceans? |
| A. | Cyanobacteria |
| B. | Diatoms |
| C. | Dinoflagellates |
| D. | Euglenoids |
| Answer» C. Dinoflagellates | |
| 123. |
Which of the following animals does not undergo metamorphosis? |
| A. | Moth |
| B. | Tunicate |
| C. | Earthworm |
| D. | Starfish |
| Answer» D. Starfish | |
| 124. |
Which one of these animals is not a homeotherm? |
| A. | Camelus |
| B. | Chelone |
| C. | Macropus |
| D. | Psittacula |
| Answer» C. Macropus | |
| 125. |
Which of the following features is used to identify a male cockroach from a female cockroach? |
| A. | Forewings with darker tegmina |
| B. | Presence of caudal styles |
| C. | Presence of a boat shaped sternum on the 9th abdominal segment |
| D. | Presence of anal cerci |
| Answer» C. Presence of a boat shaped sternum on the 9th abdominal segment | |
| 126. |
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system |
| A. | Aves |
| B. | Reptilia |
| C. | Amphibia |
| D. | Osteichthyes |
| Answer» B. Reptilia | |
| 127. |
Ciliates differ from all other protozoans in |
| A. | using pseudopodia for capturing prey |
| B. | having a contractile vacuole for removing excess water |
| C. | using flagella for locomotion |
| D. | having two types of nuclei |
| Answer» E. | |
| 128. |
The contraceptive ‘SAHELI’ |
| A. | is an IUD. |
| B. | increases the concentration of estrogen and prevents ovulation in females |
| C. | blocks estrogen receptors in the uterus, preventing eggs from getting implanted. |
| D. | is a post-coital contraceptive |
| Answer» D. is a post-coital contraceptive | |
| 129. |
The difference between spermiogenesis and spermiation is |
| A. | In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed. |
| B. | In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed. |
| C. | In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed. |
| D. | In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules. |
| Answer» E. | |
| 130. |
Hormones secreted by the placenta to maintain pregnancy are |
| A. | hCG, hPL, progestogens, estrogens |
| B. | hCG, hPL, estrogens, relaxin, oxytocin |
| C. | hCG, hPL, progestogens, prolactin |
| D. | hCG, progestogens, estrogens, glucocorticoids |
| Answer» B. hCG, hPL, estrogens, relaxin, oxytocin | |
| 131. |
The amnion of mammalian embryo is derived from |
| A. | mesoderm and trophoblast |
| B. | endoderm and mesoderm |
| C. | ectoderm and mesoderm |
| D. | ectoderm and endoderm |
| Answer» D. ectoderm and endoderm | |
| 132. |
Which of the following hormones can play a significant role in osteoporosis? |
| A. | Estrogen and Parathyroid hormone |
| B. | Progesterone and Aldosterone |
| C. | Aldosterone and Prolactin |
| D. | Parathyroid hormone and Prolactin |
| Answer» B. Progesterone and Aldosterone | |
| 133. |
Which of the following is an amino acid derived hormone? |
| A. | Estradiol |
| B. | Ecdysone |
| C. | Epinephrine |
| D. | Estriol |
| Answer» D. Estriol | |
| 134. |
The transparent lens in the human eye is held in its place by |
| A. | smooth muscles attached to the iris |
| B. | ligaments attached to the iris |
| C. | ligaments attached to the ciliary body |
| D. | smooth muscles attached to the ciliary body |
| Answer» D. smooth muscles attached to the ciliary body | |
| 135. |
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively? |
| A. | Increased respiratory surface; Inflammation of bronchioles |
| B. | Increased number of bronchioles; Increased respiratory surface |
| C. | Inflammation of bronchioles; Decreased respiratory surface |
| D. | Decreased respiratory surface; Inflammation of bronchioles |
| Answer» D. Decreased respiratory surface; Inflammation of bronchioles | |
| 136. |
Winged pollen grains are present in |
| A. | Mango |
| B. | Cycas |
| C. | Mustard |
| D. | Pinus |
| Answer» E. | |
| 137. |
After karyogamy followed by meiosis, spores are produced exogenously in |
| A. | Agaricus |
| B. | Alternaria |
| C. | Neurospora |
| D. | Saccharomyces |
| Answer» B. Alternaria | |
| 138. |
Select the wrong statement : |
| A. | Pseudopodia are locomotory and feeding structures in Sporozoans |
| B. | Mushrooms belong to Basidiomycetes |
| C. | Cell wall is present in members of Fungi and Plantae |
| D. | Mitochondria are the powerhouse of the cell in all kingdoms except Monera |
| Answer» B. Mushrooms belong to Basidiomycetes | |
| 139. |
Secondary xylem and phloem in dicot stem are produced by |
| A. | Phellogen |
| B. | Vascular cambium |
| C. | Apical meristems |
| D. | Axillary meristems |
| Answer» C. Apical meristems | |
| 140. |
Sweet potato is a modified |
| A. | Tap root |
| B. | Adventitious root |
| C. | Stem |
| D. | Rhizome |
| Answer» C. Stem | |
| 141. |
Stomata in grass leaf are |
| A. | Rectangular |
| B. | Kidney shaped |
| C. | Dumb-bell shaped |
| D. | Barrel shaped |
| Answer» D. Barrel shaped | |
| 142. |
Plants having little or no secondary growth are |
| A. | Conifers |
| B. | Deciduous angiosperms |
| C. | Grasses |
| D. | Cycads |
| Answer» D. Cycads | |
| 143. |
The stage during which separation of the paired homologous chromosomes begins is |
| A. | Diakinesis |
| B. | Diplotene |
| C. | Pachytene |
| D. | Zygotene |
| Answer» C. Pachytene | |
| 144. |
Casparian strips occur in |
| A. | Cortex |
| B. | Pericycle |
| C. | Epidermis |
| D. | Endodermis |
| Answer» E. | |
| 145. |
Pneumatophores occur in |
| A. | Carnivorous plants |
| B. | Free-floating hydrophytes |
| C. | Halophytes |
| D. | Submerged hydrophytes |
| Answer» D. Submerged hydrophytes | |
| 146. |
Which of the following is true for nucleolus? |
| A. | It takes part in spindle formation |
| B. | It is a membrane-bound structure |
| C. | Larger nucleoli are present in dividing cells |
| D. | It is a site for active ribosomal RNA synthesis |
| Answer» E. | |
| 147. |
The two functional groups characteristic of sugars are |
| A. | Carbonyl and phosphate |
| B. | Carbonyl and methyl |
| C. | Hydroxyl and methyl |
| D. | Carbonyl and hydroxyl |
| Answer» E. | |
| 148. |
Which among the following is not a prokaryote? |
| A. | Nostoc |
| B. | Mycobacterium |
| C. | Saccharomyces |
| D. | Oscillatoria |
| Answer» D. Oscillatoria | |
| 149. |
The Golgi complex participates in |
| A. | Respiration in bacteria |
| B. | Formation of secretory vesicles |
| C. | Fatty acid breakdown |
| D. | Activation of amino acid |
| Answer» C. Fatty acid breakdown | |
| 150. |
Which of the following is not a product of light reaction of photosynthesis? |
| A. | NADPH |
| B. | NADH |
| C. | ATP |
| D. | Oxygen |
| Answer» C. ATP | |