NEET UG

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Which of the following is true for Golden rice ? Answer: 1. It is Vitamin A enriched, with a gene from daffodil. Key idea: Golden rice is a biofortified rice rich in provitamin A (beta-caro... Applications in agriculture: GMOs, Bt crops 1 answer
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm ? Answer: 3. Alkaline pH of gut Key idea: The Bt protoxin is activated by alkaline pH. Bt toxin crystals exist as inactive protoxin. In the al... Applications in agriculture: GMOs, Bt crops 1 answer
Match the following organisms with their respective characteristics :(a) Pila (i) Flame cells(b) Bombyx (ii) Comb plates(c) Pleurobrachia (iii) Radula(d) Taenia (iv) Malpighian tubulesSelect the correct option from the following : Answer: 2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) Key idea: Match each animal with its characteristic organ. Pila (mollusc): radula, (iii).... Non-chordates up to phyla 1 answer
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ? Answer: 3. 0.16 (AA); 0.48 (Aa); 0.36 (aa) Key idea: Hardy-Weinberg: p² + 2pq + q² = 1 . p = 0.4 , so q = 1 - 0.4 = 0.6 . AA = p² = 0.16 ; A... Gene flow, genetic drift, Hardy-Weinberg principle 1 answer
Which of the following glucose transporters is insulin-dependent ? Answer: 4. GLUT IV Key idea: GLUT4 is the insulin-regulated glucose transporter. GLUT4 is found in skeletal muscle and adipose tissue; insul... Endocrine glands and hormones, mechanism of action 1 answer
Which of the following statements is correct ? Answer: 4. Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye. Key idea: The cornea is made of dense c... Neural control: neuron, nervous system, nerve impulse 1 answer
Use of an artificial kidney during hemodialysis may result in :(a) Nitrogenous waste build-up in the body(b) Non-elimination of excess potassium ions(c) Reduced absorption of calcium ions from gastro-intestinal tract(d) Reduced RBC productionWhich of… Answer: 3. (c) and (d) are correct Key idea: Dialysis removes wastes, but cannot replace endocrine functions of the kidney. (a) and (b) are... Regulation of kidney function, disorders, dialysis 1 answer
Select the hormone-releasing Intra-Uterine Devices. Answer: 3. Progestasert, LNG-20 Key idea: Hormone-releasing IUDs are progestogen releasing. Progestasert and LNG-20 release progestogen (lev... Birth control, contraception and MTP 1 answer
Extrusion of second polar body from egg nucleus occurs : Answer: 1. after entry of sperm but before fertilization Key idea: Sperm entry stimulates completion of meiosis II. The secondary oocyte is... Gametogenesis: spermatogenesis and oogenesis 1 answer
Which of the following sexually transmitted diseases is not completely curable ? Answer: 3. Genital herpes Key idea: Bacterial STDs are curable with antibiotics; viral ones are not completely curable. Gonorrhoea and chlam... Reproductive health and STDs 1 answer
Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes. Answer: 2. Goblet Cells Key idea: Mucus protects the gut lining, and goblet cells secrete mucus. Chief cells secrete pepsinogen, oxyntic (pa... Animal tissues: epithelial, connective, muscular, neural 1 answer
Select the correct group of biocontrol agents. Answer: 2. *Trichoderma*, *Baculovirus*, *Bacillus thuringiensis* Biocontrol agents include Bacillus thuringiensis (bacterium), Trichoderma... Biocontrol agents and biofertilizers 1 answer
*Thiobacillus* is a group of bacteria helpful in carrying out : Answer: 4. Denitrification Thiobacillus species oxidise sulphur compounds. The key lists Thiobacillus denitrificans, which converts nitrate... Biocontrol agents and biofertilizers 1 answer
Match the following organisms with the products they produce :(a) *Lactobacillus* (i) Cheese(b) *Saccharomyces cerevisiae* (ii) Curd(c) *Aspergillus niger* (iii) Citric Acid(d) *Acetobacter aceti* (iv) Bread(v) Acetic AcidSelect the correct option. Answer: 2. (a) (ii) (b) (iv) (c) (iii) (d) (v) Lactobacillus makes curd (ii). Saccharomyces cerevisiae is used for bread (iv). Aspergillus n... Microbes in household food processing 1 answer
Cells in G_0 phase : Answer: 3. suspend the cell cycle Cells that do not divide further leave the active cycle at G₁ and enter the quiescent G₀ stage. They remai... Cell cycle, mitosis, meiosis 1 answer
Which of the following statements regarding mitochondria is incorrect ? Answer: 2. Enzymes of electron transport are embedded in outer membrane. The enzymes of the electron transport chain are in the inner mitoch... Mitochondria, ribosomes, plastids, microbodies 1 answer
From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in : Answer: 3. Pteridophytes Key idea: Retention of the female gametophyte with the young embryo on the sporophyte appears first in pteridophyte... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus : Answer: 2. textitMangifera indica Linn. Key idea: In a scientific name the genus starts with a capital letter, the species with a small lett... Taxonomy and systematics, species, taxonomic hierarchy, binomial nomenclature 1 answer
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere ? Answer: 1. Montreal Protocol Key idea: The Montreal Protocol (1987) controls substances that deplete the ozone layer, mainly CFCs. Kyoto Pro... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
Which of the following ecological pyramids is generally inverted ? Answer: 4. Pyramid of biomass in a sea Key idea: A pyramid is inverted when producers weigh less than consumers at a given time. In the sea,... Energy flow and ecological pyramids 1 answer
What map unit (Centimorgan) is adopted in the construction of genetic maps ? Answer: 3. A unit of distance between genes on chromosomes, representing 1% cross over. One map unit (centimorgan) is the distance between g... Chromosome theory, linkage and crossing over 1 answer
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F_1 generation, pink flowers were obtained. When pink flowers were selfed, the F_2 generation showed white, red and pink flowers. Choose the incorrect statement from the… Answer: 4. Law of Segregation does not apply in this experiment. Key idea: Flower colour in snapdragon shows incomplete dominance, but segre... Deviations: incomplete dominance, co-dominance, multiple alleles, blood groups, pleiotropy, polygenic inheritance 1 answer
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by : Answer: 2. Hexokinase Key idea: Hexokinase phosphorylates glucose using ATP to give glucose-6-phosphate, the first irreversible step. Phosph... Glycolysis and fermentation 1 answer
What is the direction of movement of sugars in phloem ? Answer: 4. Bi-directional Phloem moves sugars from a source to a sink. The source and sink can be anywhere, so movement can be upward or dow... Photosynthesis: site and pigments 1 answer

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