541: Consider the following statements:
1. In tropical regions, Zika virus disease is transmitted by the same mosquito that transmits dengue.
2. Sexual transmission of Zika virus disease is possible.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
542: Match List-I (Fuel Gases) with List-II (Major Constituents) and select the correct answer using the codes given below the Lists:
List-I -- List-II
(Fuel Gases) -- (Major Constituents)
A. CNG -- 1. Carbonmonoxide, Hydrogen
B. Coal gas -- 2. Butane, Propane
C. LPG -- 3. Methane, Ethane
D. Water gas -- 4. Hydrogen, Methane, Carbonmonoxide
Codes:
A B C D
(a) 2 1 3 4
(b) 3 4 2 1
(c) 2 4 3 1
(d) 3 1 2 4
543: Match List I with List II and select the correct answer by using the codes given below the lists :
List I-------List II
I. Malaria------- (A) Bone marrow
II. Filaria------- (B) Brain
III. Encephalitis------- (C) Muscle
IV. Leukaemia------- (D) Lymph node
-------------- (E) Blood cells
Codes:
(a) I-E, II-C, III-B, IV-A
(b) I-E, II-D, III-B, IV-A
(c) I-D, II-C, III-E, IV-A
(d) I-E, II-D, III-A, IV-B
544: Organic Light Emitting Diodes (OLEDs) are used to create digital display in many devices.
What are the advantages of OLED displays over Liquid Crystal displays?
1. OLED displays can be fabricated on flexible plastic substrates.
2. Roll-up displays embedded in clothing can be made using OLEDs.
3. Transparent displays are possible using OLEDs.
Select the correct answer using the code given below
(a) 1 and 3 only
(b) 2 only
(c) 1, 2 and 3
(d) None of the above statements is correct
545: 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 disease-resistant animal breeds,
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 Only
(c) 1 and 3 only
(d) 1, 2 and 3
Explanation:
DNA sequencing includes several method and technologies that are used for determining the order of the nucleotide bases-adenine, guanine, cytosine, and thymine-in a molecule of DNA. The rapid speed of sequencing attained with modern DNA sequencing technology has been instrumental in the sequencing of the human genome, in the Human Genome Project.
Application of genome research incluce :
(i) DNA Forensics to determine pedigree for seed or livestock breeds.
(ii) Agriculture, livestock breeding, and bioprocessing:
Healthier, more productive, disease-resistant farm animal breeds.
Understanding plant and animal genomes will allow us to create stronger, more disease-resistant plants and animals - reducing the costs of agriculture and providing consumers with more nutritious, pesticide-free foods. Already growers are using bioengineered seeds to grow insect - and drought-resistant crops that require little or no pesticide.