NEET UG

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Match the following columns and select the correct option.Column - I | Column - II(a) Floating Ribs | (i) Located between second and seventh ribs(b) Acromion | (ii) Head of the Humerus(c) Scapula | (iii) Clavicle(d) Glenoid cavity | (iv) Do not conne… Answer: 4. (a) (iv), (b) (iii), (c) (i), (d) (ii) Floating ribs (11th and 12th) do not connect with the sternum: (a) - (iv). Acromion is a p... Skeletal system, joints and disorders 1 answer
Goblet cells of alimentary canal are modified from : Answer: 2. Columnar epithelial cells Goblet cells, the mucus-secreting unicellular glands in the lining of the alimentary canal, are modifie... Animal tissues: epithelial, connective, muscular, neural 1 answer
Match the following columns and select the correct option.Column - I | Column - II(a) Clostridium butylicum | (i) Cyclosporin-A(b) Trichoderma polysporum | (ii) Butyric Acid(c) Monascus purpureus | (iii) Citric Acid(d) Aspergillus niger | (iv) Blood… Answer: 2. (a) (ii), (b) (i), (c) (iv), (d) (iii) Match each microbe with its product. Clostridium butylicum produces butyric acid, so (a) -... Microbes in industrial production 1 answer
Match the following with respect to meiosis :(a) Zygotene (i) Terminalization(b) Pachytene (ii) Chiasmata(c) Diplotene (iii) Crossing over(d) Diakinesis (iv) SynapsisSelect the correct option from the following : Answer: 2. (a) (iv), (b) (iii), (c) (ii), (d) (i) Link each meiotic prophase I sub-stage to its main event. Zygotene: pairing of homologous... Cell cycle, mitosis, meiosis 1 answer
Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G_0). This process occurs at the end of : Answer: 2. G ₁ phase Cells leave the cell cycle to enter the G0 (quiescent) stage at the end of G1 phase, before the S phase begins. They re... Cell cycle, mitosis, meiosis 1 answer
Which of the following is correct about viroids ? Answer: 2. They have free RNA without protein coat. Viroids are free RNA molecules without a protein coat, and are smaller than viruses. The... Lichens, viruses and viroids 1 answer
Floridean starch has structure similar to : Answer: 2. Amylopectin and glycogen Floridean starch, the food reserve of red algae, is structurally like amylopectin and glycogen. All thre... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Which of the following pairs is of unicellular algae ? Answer: 4. Chlorella and Spirulina Chlorella and Spirulina are unicellular and are used as single-cell protein. Laminaria, Sargassum, Gelidi... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Strobili or cones are found in : Answer: 4. Equisetum Strobili (cones) are found in Equisetum, a pteridophyte with sporophylls in cones. Salvinia and Pteris have sori or spo... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Montreal protocol was signed in 1987 for control of : Answer: 2. Emission of ozone depleting substances The Montreal Protocol (1987) was an international treaty to control emission of ozone depl... Biodiversity: concept, patterns, importance, loss 1 answer
Match the trophic levels with their correct species examples in grassland ecosystem.(a) Fourth trophic level (i) Crow(b) Second trophic level (ii) Vulture(c) First trophic level (iii) Rabbit(d) Third trophic level (iv) GrassSelect the correct option… Answer: 1. (a) (ii), (b) (iii), (c) (iv), (d) (i) In a grassland food chain: grass (producer, 1st level) - rabbit (primary consumer, 2nd) -... Energy flow and ecological pyramids 1 answer
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct ? Answer: 2. Gross primary productivity is always more than net primary productivity. Net primary productivity = Gross primary productivity mi... Productivity and decomposition 1 answer
If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6×10^9 bp, then the length of the DNA is approximately : Answer: 3. 2.2 meters Length = number of bp x distance per bp. L = 6.6×10⁹×0.34×10⁻⁹\ m = 2.244\ m≈ 2.2\ m So the answer is about 2.2 metres... DNA as genetic material, DNA and RNA structure, DNA packaging 1 answer
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits ? Answer: 3. 14 Mendel selected 14 true-breeding pea varieties, which formed seven pairs. Each pair differed in only one character with contra... Mendelian inheritance 1 answer
Name the enzyme that facilitates opening of DNA helix during transcription. Answer: 4. RNA polymerase During transcription, RNA polymerase itself unwinds the DNA helix locally and synthesises RNA. DNA helicase opens... Transcription, genetic code, translation, protein biosynthesis 1 answer
In light reaction, plastoquinone facilitates the transfer of electrons from : Answer: 1. PS-II to Cytb ₆ f complex In the Z-scheme, electrons from PS II go to plastoquinone (PQ), then to the Cyt b6f complex, then plast... Light reactions, cyclic and non-cyclic photophosphorylation, chemiosmosis 1 answer
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop. Answer: 2. Gibberellin Gibberellin promotes stem elongation (internode length). Spraying it on sugarcane raises stem length and hence yield... Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA 1 answer
Which of the following is not an inhibitory substance governing seed dormancy ? Answer: 1. Gibberellic acid Seed dormancy is maintained by inhibitors such as abscisic acid, phenolic acids and para-ascorbic acid. Gibberel... Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA 1 answer
In water hyacinth and water lily, pollination takes place by : Answer: 1. insects or wind Water hyacinth and water lily are aquatic plants but their flowers rise above water, so they are pollinated by in... Pollination: types, agencies, examples 1 answer
The ovary is half inferior in : Answer: 4. Plum The position of the ovary relative to other floral parts decides this. In plum (and rose, peach) the flower is perigynous an... Flower, fruit and seed 1 answer
Match the following columns and select the correct option.Column - I | Column - II(a) Bt cotton | (i) Gene therapy(b) Adenosine deaminase deficiency | (ii) Cellular defence(c) RNAi | (iii) Detection of HIV infection(d) PCR | (iv) Bacillus thuringiens… Answer: 1. (a) (iv), (b) (i), (c) (ii), (d) (iii) Bt cotton uses a gene from Bacillus thuringiensis for pest resistance: (a) - (iv). Adenosi... Applications in health: human insulin, vaccines, gene therapy 1 answer
Flippers of Penguins and Dolphins are examples of : Answer: 2. Convergent evolution Penguin and dolphin flippers have similar function and shape but evolved in unrelated groups (a bird and a m... Adaptive radiation 1 answer
Identify the correct statement with reference to human digestive system. Answer: 3. Ileum is a highly coiled part. The ileum is the long, highly coiled part of the small intestine. Option 1 is wrong: the ileum ope... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer
The enzyme enterokinase helps in conversion of : Answer: 2. trypsinogen into trypsin Enterokinase, secreted by the intestinal mucosa, activates trypsinogen into trypsin. Trypsin then activa... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer

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