NEET UG

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In gel electrophoresis, separated DNA fragments can be visualized with the help of : Answer: 2. Ethidium bromide in UV radiation Key idea: DNA in agarose gels is stained with ethidium bromide and viewed under UV light. Ethidi... Processes of recombinant DNA technology 1 answer
Choose the correct pair from the following : Answer: 1. Ligases - Join the two DNA molecules Key idea: Ligases join DNA fragments. DNA ligase seals the sugar-phosphate backbone between... Tools: restriction enzymes, vectors, host 1 answer
Match the following columns and select the correct option.Column - I: (a) Gregarious, polyphagous pest (b) Adult with radial symmetry and larva with bilateral symmetry (c) Book lungs (d) BioluminescenceColumn - II: (i) Asterias (ii) Scorpion (iii) Ct… Answer: 2. (a) (iv), (b) (i), (c) (ii), (d) (iii) Key idea: Match each feature with the animal. Gregarious polyphagous pest: Locusta (iv) Ad... Non-chordates up to phyla 1 answer
Match the following hormones with the respective disease :(a) Insulin (i) Addison's disease(b) Thyroxin (ii) Diabetes insipidus(c) Corticoids (iii) Acromegaly(d) Growth Hormone (iv) Goitre(v) Diabetes mellitusSelect the correct option. Answer: 3. (a)-(v), (b)-(iv), (c)-(i), (d)-(iii) Key idea: Match each hormone with the disorder from its deficiency or excess. Insulin: diab... Hormonal disorders 1 answer
Select the correct option. Answer: 4. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs. Key idea: Humans have... Skeletal system, joints and disorders 1 answer
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive ? Answer: 1. ZIFT and IUT Key idea: Techniques that transfer an embryo, not gametes, are ZIFT and IUT. In ZIFT, a zygote or early embryo (up t... Amniocentesis, infertility and ART (IVF, ZIFT, GIFT) 1 answer
Cuboidal epithelium with brush border of microvilli is found in : Answer: 3. proximal convoluted tubule of nephron Key idea: Brush-border cuboidal epithelium is found where absorption and secretion occur. I... Animal tissues: epithelial, connective, muscular, neural 1 answer
Which of the following can be used as a biocontrol agent in the treatment of plant disease ? Answer: 1. textitTrichoderma Key idea: Trichoderma is a fungal biocontrol agent. Trichoderma species control plant pathogens. Chlorella is a... Biocontrol agents and biofertilizers 1 answer
The concept of "Omnis cellula-e cellula" regarding cell division was first proposed by : Answer: 1. Rudolf Virchow Key idea: Rudolf Virchow proposed "Omnis cellula-e cellula" (new cells come from pre-existing cells) in 1855. Schl... Cell theory, prokaryotic and eukaryotic cells, plant vs animal cell 1 answer
Which of the following statements is incorrect ? Answer: 3. Infective constituent in viruses is the protein coat. Key idea: In viruses, the infective part is the nucleic acid (genome), not... Lichens, viruses and viroids 1 answer
Which of the following statements is incorrect ? Answer: 4. Yeasts have filamentous bodies with long thread-like hyphae. Key idea: Yeasts are unicellular, not filamentous. Morels and truffl... Monera, Protista and Fungi 1 answer
Match Column - I with Column - II.Column - I | Column - II(a) Saprophyte | (i) Symbiotic association of fungi with plant roots(b) Parasite | (ii) Decomposition of dead organic materials(c) Lichens | (iii) Living on living plants or animals(d) Mycorrh… Answer: 4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) Key idea: Match nutrition modes with their meaning. Saprophyte: decomposes dead organic ma... Monera, Protista and Fungi 1 answer
Pinus seed cannot germinate and establish without fungal association. This is because : Answer: 2. it has obligate association with mycorrhizae. Key idea: Pinus roots have an obligate mycorrhizal association. The fungus helps ab... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for : Answer: 3. construction of roads Key idea: Polyblend, made from recycled modified plastic, is used to lay roads. It is mixed with bitumen to... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by : Answer: 3. Alfred Sturtevant Key idea: Alfred Sturtevant used recombination frequency as a measure of the distance between genes. Morgan dis... Chromosome theory, linkage and crossing over 1 answer
Match the following genes of the Lac operon with their respective products :(a) i gene (i) β-galactosidase(b) z gene (ii) Permease(c) a gene (iii) Repressor(d) y gene (iv) TransacetylaseSelect the correct option. Answer: 3. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii) Key idea: Lac operon: i gene codes for repressor; z for beta-galactosidase; y for permease... Gene regulation: lac operon 1 answer
Expressed Sequence Tags (ESTs) refers to : Answer: 1. Genes expressed as RNA Key idea: ESTs identify genes that are expressed as RNA. In the genome-sequencing approach, one method seq... Human genome project and DNA fingerprinting 1 answer
What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile ? Answer: 2. Klinefelter's syndrome Key idea: Klinefelter's syndrome is XXY. The individual is male with overall masculine development but als... Sex-linked inheritance, Mendelian and chromosomal disorders 1 answer
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology ? Answer: 3. Genetic code is nearly universal Key idea: The universality of the genetic code lets one organism read another's genes. Since the... Transcription, genetic code, translation, protein biosynthesis 1 answer
Under which of the following conditions will there be no change in the reading frame of following mRNA ?5' AACAGCGGUGCUAUU 3' Answer: 4. Deletion of GGU from 7 ^th , 8 ^th and 9 ^th positions Key idea: A change that adds or removes a multiple of 3 bases keeps the re... Transcription, genetic code, translation, protein biosynthesis 1 answer
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield ? Answer: 1. Auxin and Ethylene Key idea: Auxin and ethylene induce flowering in pineapple. Auxins (like NAA) and ethylene (ethephon) promote... Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA 1 answer
Phloem in gymnosperms lacks : Answer: 4. Both sieve tubes and companion cells Key idea: Gymnosperm phloem has sieve cells and albuminous cells. Sieve tubes and companion... Plant tissues and anatomy of root, stem, leaf 1 answer
Which of the following immune responses is responsible for rejection of kidney graft ? Answer: 4. Cell-mediated immune response Key idea: Graft rejection is a cell-mediated response. T-lymphocytes recognise the foreign tissue a... Immunology basics and vaccines 1 answer
Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid. Answer: 4. textitSalmonella typhi / Widal test Key idea: Typhoid is caused by Salmonella typhi and diagnosed by the Widal test. Plasmodium v... Pathogens and parasites causing human diseases 1 answer

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