Medical Entrance Exams NEET practice set-9 10

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90. The protoplast can be isolated by an enzymatic method from a variety of tissues including :
(a) Leaves
(b) Roots and callus
(c) Shoot culture, cell suspension and pollen
(d) From all of the above
91. Respiratory roots are found in :
(a) Betel (b) Zea mays
(c) Jussiaea (d) Rhizophora
92. Fusogen is a/an :
(a) Fusion inducing agent
(b) an enzyme which helps in selecting a specific protoplast
(c) A substance used for the identification of protoplasts of two species
(d) None of these
93. The growth of sepals and petals involves :
(a) Apical growth
(b) Intercalary growth
(c) Radial growth
(d) All of these
94. Polyethylene glycol (PEG) induces protoplast fusion by treating protoplast mixture with :
(a) 10-30% PEG
(b) 20-35% PEG
(c) 28-50% PEG
(d) Any concentration of PEG
95. An example of gene therapy is :
(a) Production of injectable Hepatitis B vaccine
(b) Production of vaccines in food crops like potatoes which can be eaten
(c) Introduction of gene for adenosine deaminase in person suffering from Severe Combined Immuno Deficiency (SCID)
(d) Production of test tube babies by artificial insemination and implantation of fertilized eggs
96. Electron transport system :
(a) Is found in both mitochondria and chloroplasts
(b) Release energy as electrons are transferred
(c) Is involved in the production of ATP
(d) All of these
97. Ants improve the germination percentage of Calathea seeds by removing the :
(a) Seed coat
(b) Caruncle
(c) Sticky endosperm
(d) Aril
98. Cultivation of Bt cotton has been much in the news. The prefix ‘Bt’ means :
(a) ‘Barium-treated’ cottonseed
(b) ‘Bigger thread’ variety of cotton with better tensile strength
(c) Produced by ‘biotechnology’ using restriction enzymes and ligases
(d) Carrying in endotoxin gene from Bacillus thuringiensis
99. A random collection of a sufficiently large sample of cloned segments of the DNA of an organ is to ensure that all of that organisms DNA is represented in the collection is called :
(a) Autoradiography
(b) c-DNA
(c) Gene library
(d) Palindrome
100. The total number of nitrogenous bases in the human genome is estimated to be about :
(a) 3.5 million (b) 35 thousand
(c) 35 million (d) 3.1 billion
In each of the following question, a statement of Assertion (A) is given followed by a corresponding statement of