NEET UG

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Which one of the following is not a method of *in situ* conservation of biodiversity ? Answer: 3. Botanical Garden In situ conservation protects species in their natural habitat: biosphere reserves, sanctuaries, national parks... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
Purines found both in DNA and RNA are : Answer: 2. Adenine and guanine The purines are adenine and guanine, and both are present in DNA and RNA. Thymine and cytosine are pyrimidine... DNA as genetic material, DNA and RNA structure, DNA packaging 1 answer
Select the incorrect statement. Answer: 3. In domesticated fowls, sex of progeny depends on the type of sperm rather than egg. We look for the incorrect statement. Male fru... Sex determination: humans, birds, honey bee 1 answer
Respiratory Quotient (RQ) value of tripalmitin is : Answer: 2. 0.7 RQ=volume of CO₂ released/volume of O₂ used . Tripalmitin (a fat) oxidises as mathrm2C₅₁H₉₈O₆ + 145 O₂ → 102 CO₂ + 98 H₂O . R... Amphibolic pathway and respiratory quotient 1 answer
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ? Answer: 4. Ovules develop into embryo sac After fertilisation: ovary becomes fruit, ovule becomes seed, zygote becomes embryo, and the prima... Seed and fruit formation and significance 1 answer
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following : Answer: 2. Flaccidity of bulliform cells Grass leaves have large thin-walled bulliform (motor) cells in the upper epidermis. In dry weather... Plant tissues and anatomy of root, stem, leaf 1 answer
Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes ? Answer: 4. Bioreactor Large-scale culture of microbes for products such as enzymes needs a bioreactor, which gives controlled temperature, p... Processes of recombinant DNA technology 1 answer
Consider following features :(a) Organ system level of organisation(b) Bilateral symmetry(c) True coelomates with segmentation of bodySelect the correct option of animal groups which possess all the above characteristics. Answer: 1. Annelida, Arthropoda and Chordata We need a group with organ-system organisation, bilateral symmetry and a true coelom with segme... Non-chordates up to phyla 1 answer
In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taki… Answer: 2. Stabilizing Selection Here the average-weight babies survive and both extremes (very light and very heavy) die. Selection favours... Darwin and modern synthetic theory 1 answer
Variations caused by mutation, as proposed by Hugo de Vries, are : Answer: 2. random and directionless Hugo de Vries proposed mutation theory. Mutations are large, sudden changes that are random and directio... Darwin and modern synthetic theory 1 answer
Match the hominids with their correct brain size :(a) *Homo habilis* (i) 900 cc(b) *Homo neanderthalensis* (ii) 1350 cc(c) *Homo erectus* (iii) 650 - 800 cc(d) *Homo sapiens* (iv) 1400 ccSelect the correct option. Answer: 3. (a) (iii) (b) (iv) (c) (i) (d) (ii) Brain sizes: Homo habilis 650-800 cc, Homo erectus about 900 cc, Homo sapiens about 1350 cc,... Human evolution 1 answer
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to : Answer: 2. inflammation of bronchi and bronchioles. Wheezing is typical of asthma, which is inflammation of the bronchi and bronchioles caus... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer
Match the Column - I with Column - II :Column - I | Column - II(a) P - wave | (i) Depolarisation of ventricles(b) QRS complex | (ii) Repolarisation of ventricles(c) T - wave | (iii) Coronary ischemia(d) Reduction in the size of T - wave | (iv) Depola… Answer: 1. (a) (iv) (b) (i) (c) (ii) (d) (iii) Link each ECG part to the cardiac event. P-wave: depolarisation of the atria, so (iv). QRS co... Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders 1 answer
How does steroid hormone influence the cellular activities ? Answer: 2. Binding to DNA and forming a gene-hormone complex. Steroid hormones are lipid-soluble, so they enter the cell and bind to intrace... Endocrine glands and hormones, mechanism of action 1 answer
Which of the following muscular disorders is inherited ? Answer: 2. Muscular dystrophy Muscular dystrophy is a genetic (X-linked) disorder causing progressive degeneration of skeletal muscle. Tetan... Locomotion: movement types, muscle contraction 1 answer
Which part of the brain is responsible for thermoregulation ? Answer: 2. Hypothalamus The hypothalamus contains the thermoregulatory centre. It also controls hunger, thirst and hormone release. The cere... Neural control: neuron, nervous system, nerve impulse 1 answer
Select the correct sequence for transport of sperm cells in male reproductive system. Answer: 2. Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus S... Male and female reproductive systems 1 answer
Match the following structures with their respective location in organs :(a) Crypts of Lieberkühn (i) Pancreas(b) Glisson's Capsule (ii) Duodenum(c) Islets of Langerhans (iii) Small intestine(d) Brunner's Glands (iv) LiverSelect the correct option fr… Answer: 3. (a) (iii) (b) (iv) (c) (i) (d) (ii) Match each structure with its organ. Crypts of Lieberkuhn: glands in the small intestine, so... Animal tissues: epithelial, connective, muscular, neural 1 answer
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in : Answer: 4. Bronchioles and Fallopian tubes Ciliated epithelium moves mucus and particles in one direction. In humans it lines the bronchiole... Animal tissues: epithelial, connective, muscular, neural 1 answer
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth : Answer: 1. Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum The cockroach alimentary canal runs: mouth, pharynx, oesophagus, c... Frog: morphology and anatomy 1 answer
The Earth Summit held in Rio de Janeiro in 1992 was called : Answer: 2. for conservation of biodiversity and sustainable utilization of its benefits. The 1992 Earth Summit at Rio de Janeiro (the UN Con... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region ? Answer: 2. Balmer series Balmer series (transitions to n = 2 from n = 3, 4, 5...) lies in the visible region (about 656 to 365 nm). Lyman is... Bohr model and its limitations 1 answer
Among the following, the narrow spectrum antibiotic is : Answer: 1. penicillin G Narrow spectrum antibiotics act on a limited range of bacteria. Penicillin G is mainly effective against gram-positi... Vitamins 1 answer
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is : Answer: 3. C ₃ A ₄ In hcp, if there are N anions then there are N octahedral voids. Cations occupy 75% of octahedral voids, so cations = 0.7... Ionic bonding and lattice enthalpy 1 answer

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