Q241. With reference to ‘stem cells’, frequently in the news, which of the following statement(s) is/are correct? 1. Stem cells can be derived from mammals only. 2. Stem cells can be used for screening new drugs. 3. Stem cells can be used for medical therapies. Select the correct answer using the codes given below.
A 1 and 2 B 2 and 3 C Only 3 D 1, 2 and 3
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Correct answer: 2 and 3
General Science
English
Andhra Pradesh PSC (Pre) 2016 RAS/RTS (Pre)(Re. Exam) 2013
Q242. Steps of Recombinant DNA technology are given below. 1. Identification and isolation of the genetic material. 2. Fragmentation of DNA. 3. Obtaining the foreign gene product. 4. Downstream processing. 5. Ligation of DNA fragmentation into the vector. 6. Isolation of desired DNA fragments. 7. Amplification of gene of interest. 8. Transfer of Recombinant DNA into the host cell/organism. The correct sequence of steps is
A 3 → 1 → 2 → 4 → 6 → 5 → 7 → 8 B 1 → 4 → 3 → 2 → 5 → 7 → 6 → 8 C 1 → 2 → 6 → 7 → 5 → 8 → 3 → 4 D 8 → 6 → 7 → 5 → 1 → 4 → 2 → 3
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Correct answer: 1 → 2 → 6 → 7 → 5 → 8 → 3 → 4
Q243. At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us? 1. It is possible to know the pedigree of livestock. 2. It is possible to understand the causes of all human diseases. 3. It is possible to develop diseaseresistant animal breeds. Which of the statements given above is/are correct?
A 1 and 2 B Only 2 C 1 and 3 D 1, 2 and 3
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Correct answer: 1 and 3
Q244. Consider the following effects of genetic engineering. 1. Disease resistance 2. Growth promotion 3. Animal cloning 4. Human cloning Of the above, that have been tried with a certain amount of success include.
A 1, 3 and 4 B 2, 3 and 4 C 1, 2 and 4 D 1, 2 and 3
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Correct answer: 1, 2 and 3
Q245. Assertion (A): Dolly was the first cloned mammal. Reason (R): Dolly was produced by in-vitro fertilization.
A Both (A) and (R) are true and (R) is the correct explanation of B Both (A) and (R) are true, but (R) is not the correct explanation of (A) C (A) is true, but (R) is false D (A) is false, but (R) is true
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Correct answer: (A) is true, but (R) is false
Q246. Consider the following as objectives of the New Science and Technology Policy, 2003 and state which is/are correctly stated, with the help of codes given below? 1. Optimal utilisation of existing physical and knowledge resources. 2. Development of innovative technologies. 3. Development of systems and technologies for mitigation and management of natural hazards. 4. Management of intellectual property. Code
A Only 1 and 2 B 1, 2 and 3 C 1, 3 and 4 D All the four
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Correct answer: All the four
Q247. Which of the following statements is/are correct regarding vegetative propagation of plants? 1. Vegetative propagation produces clonal population. 2. Vegetative propagation helps in eliminating the virus. 3. Vegetative propagation can be practised most of the year. Select the correct answer using the code given below.
A Only 1 B Only 2 and 3 C Only 1 and 3 D 1, 2 and 3
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Correct answer: Only 1 and 3
Q248. Recombinant DNA Technology (Genetic Engineering) allows genes to be transferred. 1. Across different species of plants. 2. From animals to plants. 3. From micro-organisms to higher organisms. Select the correct answer using the codes given below.
A Only 1 B 2 and 3 C 1 and 3 D All of these
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Correct answer: All of these
Q249. In gene therapy, to correct the functioning of a faulty gene
A Bad gene is eleminated B Another good gene is inserted C Defective gene is stopped from working D The whole bad gene is replaced by a good gene
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Correct answer: Another good gene is inserted
Q250. When one gene controls two or more different characters simultaneously, the phenomenon is called
A Apomixis B Pleiotropy C Polyploidy D Polyteny
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Correct answer: Pleiotropy
Q251. Change in the base sequence within the gene is called
A Breeding B Cloning C Mutation D Fusion
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Correct answer: Mutation
Q252. Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?
A Isolation B Mutation C Natural selection D Sexual reproduction
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Correct answer: Mutation
Q253. Which one of the following is not achieved by transgenic?
A Production of biodegradable plastic B Production of edible vaccines C Production of cloned animals D Production of transgenic crops
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Correct answer: Production of cloned animals
Q254. ‘Metastasis’ is the process by which
A Cells divide rapidly under the influence of drugs B Cancer cells spread through the blood or lymphatic system to other sites or organs C The chromosomes in cells nuclei are attached to the spindle before moving to the anaphase poles D Cancer cells are successfully inhibited to divide any further
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Correct answer: Cancer cells spread through the blood or lymphatic system to other sites or organs
Q255. The powder used for developing fingerprints on a multi-coloured surface is
A Gold dust B Manganese dioxide C Charcoal D Fluorescent powder
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Correct answer: Fluorescent powder
Q256. DNA fingerprinting is used in the following area(s).
A Forensic cases only B Paternity dispute only C Conservation of endangered living being only D All of the above
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Correct answer: All of the above
Q257. The first crime ever solved using the DNA fingerprinting technique was in England in the year
A 1963 B 1973 C 1983 D 1993
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Correct answer: 1983
Q258. The latest technique used to establish identity of a human being based on biotechnological principle is
A Biometric analysis B Genome sequencing C DNA fingerprinting D Karyotyping
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Correct answer: DNA fingerprinting
Q259. Which one of the given is useful for proving paternity?
A Gene therapy B Gene cloning C DNA Recombinant technology D DNA fingerprinting
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Correct answer: DNA fingerprinting
Q260. Which one of the following techniques can be used to establish the paternity of a child?
A Protein analysis B Chromosome counting C Quantitative analysis of DNA D DNA fingerprinting
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Correct answer: DNA fingerprinting