NEET UG

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Which of the following microbes is NOT involved in the preparation of household products?A. Aspergillus nigerB. LactobacillusC. Trichoderma polysporumD. Saccharomyces cerevisiaeE. Propionibacterium sharmaniiChoose the correct answer from the options… Answer: 2. A and C only Key idea: Separate household products from industrial products. Aspergillus niger is used for industrial production... Microbes in household food processing 1 answer
What is the main function of the spindle fibers during mitosis ? Answer: 1. To separate the chromosomes Key idea: Spindle fibres are microtubules that attach to the kinetochores. During anaphase they pull... Cell cycle, mitosis, meiosis 1 answer
Which one of the following is the characteristic feature of gymnosperms? Answer: 2. Seeds are naked. Key idea: Gymnos means naked. In gymnosperms the ovules are not enclosed in an ovary, so the seeds are naked. Fr... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Match List I with List II.List I: A. Pteridophyte B. Bryophyte C. Angiosperm D. GymnospermList II: I. Salvia II. Ginkgo III. Polytrichum IV. SalviniaChoose the option with all correct matches. Answer: 2. A-IV, B-III, C-I, D-II Key idea: Identify each plant group. Pteridophyte: Salvinia (A-IV). Bryophyte: Polytrichum, a moss (B-III)... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
In bryophytes, the gemmae help in which one of the following? Answer: 2. Asexual reproduction Key idea: Gemmae are green multicellular buds in cups on the thallus of liverworts such as Marchantia. They... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Match List I with List II :List I: A. The Evil Quartet B. Ex situ conservation C. Lantana camara D. DodoList II: I. Cryopreservation II. Alien species invasion III. Causes of biodiversity losses IV. ExtinctionChoose the correct matches. Answer: 2. A-III, B-I, C-II, D-IV Key idea: Biodiversity conservation terms. The Evil Quartet: the causes of biodiversity losses (A-III). Ex... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
Given below are two statements :Statement I : In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.Statement II : Ecosystems are exempted from 2nd law of thermodynamics.In the light of the above statements, choose t… Answer: 3. Statement I is correct but statement II is incorrect Key idea: Energy flow in an ecosystem is unidirectional, and it obeys thermo... Energy flow and ecological pyramids 1 answer
Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population? Answer: 2. dN/dt = rN((K - N)/K) Key idea: The Verhulst-Pearl logistic equation includes the carrying capacity K. dN/dt=rN(K-N/K) When N is... Population attributes: growth, birth and death rate, age distribution 1 answer
Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true? Answer: 2. They are fraternal twins. Key idea: Monozygotic twins come from one zygote and have the same sex. A boy and a girl have different... Sex determination: humans, birds, honey bee 1 answer
Who proposed that the genetic code for amino acids should be made up of three nucleotides? Answer: 1. George Gamow Key idea: The triplet nature of the genetic code was first theorised by the physicist George Gamow. Since 20 amino a... Transcription, genetic code, translation, protein biosynthesis 1 answer
Which factor is important for termination of transcription? Answer: 3. ρ (rho) Key idea: In bacteria, the sigma factor starts transcription and the rho (ρ) factor terminates it. Alpha is a subunit of... Transcription, genetic code, translation, protein biosynthesis 1 answer
Which of the following statements about RuBisCO is true? Answer: 4. It catalyzes the carboxylation of RuBP. Key idea: RuBisCO is the carboxylating enzyme of the Calvin cycle. It catalyses carboxyla... C3 and C4 pathways, photorespiration 1 answer
Read the following statements on plant growth and development.A. Parthenocarpy can be induced by auxins.B. Plant growth regulators can be involved in promotion as well as inhibition of growth.C. Dedifferentiation is a pre-requisite for re-differentia… Answer: 1. A, B, C only Key idea: Check each statement. A true: auxins can induce parthenocarpy. B true: PGRs may promote or inhibit growth.... Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA 1 answer
Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body? Answer: 2. Innate Immunity Key idea: Innate immunity is present from birth and is non-specific. Acquired immunity is pathogen-specific and d... Immunology basics and vaccines 1 answer
Why can't insulin be given orally to diabetic patients? Answer: 2. It will be digested in Gastro-Intestinal (GI) tract Key idea: Insulin is a protein (peptide hormone). If taken orally, it is dige... Applications in health: human insulin, vaccines, gene therapy 1 answer
Which of the following enzyme(s) are NOT essential for gene cloning?A. Restriction enzymesB. DNA ligaseC. DNA mutaseD. DNA recombinaseE. DNA polymeraseChoose the correct answer from the options given below : Answer: 1. C and D only Key idea: Gene cloning needs enzymes to cut (restriction enzymes), join (DNA ligase), and make copies (DNA polymeras... Tools: restriction enzymes, vectors, host 1 answer
The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in presence of a chromogenic substrate.Given below are two statements abo… Answer: 4. Statement I is incorrect but Statement II is correct Key idea: Insertional inactivation of the lacZ gene (β-galactosidase). In a... Tools: restriction enzymes, vectors, host 1 answer
Role of the water vascular system in Echinoderms is :A. Respiration and LocomotionB. Excretion and LocomotionC. Capture and transport of foodD. Digestion and RespirationE. Digestion and ExcretionChoose the correct answer from the options given below… Answer: 2. A and C Only Key idea: The water vascular system of echinoderms (tube feet) works in locomotion, capture and transport of food, a... Non-chordates up to phyla 1 answer
Which of the following hormones released from the pituitary is actually synthesized in the hypothalamus ? Answer: 2. Anti-diuretic hormone (ADH) Key idea: Posterior pituitary hormones are made in the hypothalamus. ADH (and oxytocin) is synthesise... Endocrine glands and hormones, mechanism of action 1 answer
Match List - I with List - II.List - I: A. Progesterone B. Relaxin C. Melanocyte stimulating hormone D. CatecholaminesList - II: I. Pars intermedia II. Ovary III. Adrenal Medulla IV. Corpus luteumChoose the correct answer from the options given below… Answer: 1. A-IV, B-II, C-I, D-III Key idea: Match each hormone to its source. Progesterone: corpus luteum (A-IV). Relaxin: ovary (B-II). MSH... Endocrine glands and hormones, mechanism of action 1 answer
Consider the following statements regarding function of adrenal medullary hormones :A. It causes pupilary constrictionB. It is a hyperglycemic hormoneC. It causes piloerectionD. It increases strength of heart contractionChoose the correct answer from… Answer: 2. B, C and D Only Key idea: Adrenaline and noradrenaline prepare the body for fight or flight. A: wrong. They cause pupil dilation,... Endocrine glands and hormones, mechanism of action 1 answer
In frog, the Renal portal system is a special venous connection that acts to link : Answer: 4. Kidney and lower part of body Key idea: A portal system begins and ends in capillaries. In frogs, the renal portal system carries... Frog: digestive, circulatory, respiratory, nervous and reproductive systems 1 answer
Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following : Answer: 3. The statement is false for water but true for land Key idea: Frogs breathe through the skin in water, and through the lungs on la... Frog: digestive, circulatory, respiratory, nervous and reproductive systems 1 answer
Match List I with List II.List I: A. Adenosine B. Adenylic acid C. Adenine D. AlanineList II: I. Nitrogen base II. Nucleotide III. Nucleoside IV. Amino acidChoose the option with all correct matches. Answer: 3. A-III, B-II, C-I, D-IV Key idea: Know the building blocks of nucleic acids: base, nucleoside, nucleotide. Adenosine = adenine + s... Biomolecules: proteins, carbohydrates, lipids, nucleic acids 1 answer

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