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Practice Question for AIIMS

Practice Questions for AIIMS Q.1.Wings a pigeon, bat, and mosquito shows ? A. Atavism B. Convergent evolution C. Divergent evolution D. Mutation, Q.2.Gelatin, an important raw material for the preparation of photographic emulsion is a by-product of ? A. Chicken B Forest C Cattle D Fish, Q.3.The phylogenetic system of classification includes ? A. Evolution trends only B. Genetic trends only C. Evolution as well as morphology D Behavior trends in environment, Q.3.Red tide’ is caused by ? A. Gonylax B Ceratium C Taceratium D All of these, Q.4.A person sitting at rest experiences a temporary cessation of breathing after forced deep breathing for a few minutes. This is due to ? A High amount of co2 in blood B High amount of o2 in blood C Little amount of co2 D Little amount of o2, Q.5.Physiological response of plants to the duration of light and darkness are a ? A Daily Phase cycle

Mutation-cause,effects and disease

Mutation Mutation :- Mutation Mutation could be a permanent modification within the deoxyribonucleic acid sequence that produces up a cistron. Mutations direct size from one deoxyribonucleic acid base to a full body modification. Mutation Types of Mutation :- Missense Insertion Nonesense Deletion Repet enlargement Frameshift mutation Missense Mutation :- Missense Mutation This type of mutation could be a modification in one deoxyribonucleic acid nucleotide that resultsin the substitution of 1 aminoalkanoic acid for an additional within the supermolecule created by a cistron. Insertion Mutation :- Insertion Mutation An insertion changesthe range of deoxyribonucleic acid basesin a cistron by adding a bit of deoxyribonucleic acid. As a result, the supermolecule created by the cistron might not operate proper

NEET Practice Questions 2015

Questions & Answers Q.1.When the chromosomes line up in cell division this is often referred to as that phase? A. Telophase B. Anaphase C. Metaphase D. Prophase, Q.2. That cellular organ contains enzymes that are thought of digestive? A. Golgi apparatus B. Lysosomes C. Nucleus D. Ribosomes, Q.3. Organs repair themselves through a method of? A. Meiosis B. Mitosis C. Cellular differentiation D. Transformation, Q.4. That of the subsequent is taken into account a model for accelerator action? A. Lock and Key model B. accelerator interaction model C. Transformation model D. Transcription model, Q.5. That of the subsequent statements concerning enzymes isn't true? A. Enzymes are catalysts. B. the majority enzymes ar proteins. C. Enzymes operate most expeditiously at optimum pH. D. Enzymes are destroyed throughout chemical reactions., Q.6. That of the subsequent statements concerning prostaglandins

DNA Double Helix Model -Discovery and Explanation

Double helix model of deoxyribonucleic acid Watson and Crick(1953)- DNA Double Helix Model Early models of deoxyribonucleic acid :- A structure for supermolecule has already been planned by Pauling and Corey. Their model consists of 3 tangled chains, with the phosphates close to the fibre axis, and also the bases on the skin. Another three-chain structure has additionally been urged by Fraser. In his model the phosphates square measure on the skin and also the bases on the within, connected along by element bonds. On Feb. 28, 1953, Francis Henry Compton Crick walked into the Eagle taphouse in Cambridge, England, and, as geneticist later recalled, proclaimed that "we had found the key of life." Actually, they had. That morning, Watson and Crick had discovered the structure of DNA, DNA. which structure — a "double helix" which will "unzip" to create copies of itself — confirmed suspicions that desoxyr

Molecular Basis of inheritance-NEET Questions

Questions of the molecular basis of Inheritance Q.1. The isotopes used in the blender experiment are? A. 32 S and 32 P B. 32 S and 35 P C. 35 S and 35 P D. 35 S and 35 P Ans: A Q.2. Semi-conservative mode of replication was demonstrated first in? A. Orchid Root B. Bean root tip C. E. Coli D. Neurospora Ans: B Q.3. The enzyme which unwinds the double helix of DNA? A. ligase. B. helicase C. polymerase D. topoisomerase Ans: B Q.4. The Okazaki fragments are combined by an enzyme ? A. Ligase B. Helicase C. polymerase D. topoisomerase Ans: A Q.5. The inherited human disorder is called by Harrods is ? A. Sex-linked inheritance B. Sex influenced inheritance C. Genetic disorder D. inborn error of metabolism Ans: D Q.6. The step involved in protein synthesis is? A. Transcription and translation B. transcription and transformation C. T

Question on Algae -Characterstics ,thallus and reproductive system

Questions on Algae Q.1. Agar-Agar is obtained from ? A. Gelidium B. Polysiphonia C. Fucus D. Lamineria Ans: A Q.2. Plants are which is not differentiated into root, stem and leaf are in under ? A. Pteridophytes B. Gymnosperms C. Thallophyta D. Angiosperms Ans: C Q.3. Which are the most primitive group of algae is ? A. BGA B. Green algae C. Yellow Algae D. Red Algae Ans: A Q.4. Iodine is obtained from? A lamineria B. Ulothrix C. Spirogyra D. gelidium Ans: A Q.5. Which of the following is advanced group of algae? A. Cyanophyaecae B. Rhodophyaecae C. Chlorophyaecae D. Phaeophyaecae Ans : B Q.6. Which algae is responsible for red-sea ? A. Trichoderma erytherium B. chlymdomonas C. Ulothrix D. None of these Ans: A Q.7. One of the following is present in BGA? A