[" Who amongst the following scientists had no contribution in the "],[" development of the double helix model for the structure of DNA? "],[" a.Rosalind Franklin "],[" b.Maurice Wilkins "],[" c.Erwin Chargaff "]

Who amongst the following scientists had no contribution the development of the -double helix model for the structure of DNA ?

The human chromoses scientists had no contribution in the development of the double helix model for the structure of DNA

Name the scientists who gave double helix model of DNA. Explain the structure with the help of a well labelled diagram.

Who amongst the following scientist rediscovered Mendel's work ? (a) T.H. Morgan (b) W. Bateson (c) E. Strasburger (d) Von Tschermak

Who amongst the following scientist rediscovered Mendel's work ? (a) T.H. Morgan (b) W. Bateson (c) E. Strasburger (d) Von Tschermak

Which of the following is stronger in a DNA double helix. A)C-G B)A-T

Read the following statements and find out the incorrect statements. a. The length of DNA is usually defined as number of nucleotides or base pairs present in it. b. In DNA, every nucleotide residue has an additional -OH group present at 2' -position in the deoxyribose. c. Nuclein was discovered and named by Friedrich Meisher in 1969. d. Adenine pair with Thymine and Guanine with Cytosine through H-bonds. This makes one strand complementary to the other. e. the proposition of double helical model of DNA was also based on the observation of Erwin Chargaff.

An Auto Company, Win ltd is facing a problem of declining market share due to increased competition from other new and existing players in the market. Its competitors are introducing lower priced models for mass consumers who are price sensitive. The Board of Directors of the Company announced a meeting to discuss the decisions regarding pricing and launching a new range of models, in order to increase the market share of the company. Attending the meeting was not a discretion for the directors and a penalty was announced for not attending the meeting. The following decisions were taken in the meeting: a) to define the desired future position of the company, as acquiring a dominant position in the market by increasing the market share to 10 in 1 year. b) to change the criteria for choosing vendors for procuring supplies, c) to invest in development of the human resources of the organisation by providing training to higher levels by holding seminars and providing on the job training for the supervisory management. What are standing plans and single use plans Briefly explain the plans discussed above, which can be classified as standing plans, by quoting the lines.

Answer question numbers 3(a) - 3(d) on the basis of your understanding of the following paragraph and the related studied concepts: Around the year 1800, only 30 elements were known. Dobereiner in 1817 and Newlands in 1866 tried to arrange the then known elements and framed laws which were rejected by the scientists. Even after the ejection of the proposed laws, many scientists continued to search for a pattern that correlated the properties of elements with their atomic masses. The main credit for classifying elements goes to Mendeleev for his most important contribution to the early development of a Periodic table of elements wherein he arranged the elements on the basis of their fundamental property, the atomic mass and also on the similarity of chemical properties. The formula of their hydrides and oxides were treated as basic criteria for the classification of the elements. However, Mendeleev's classification also had some limitations as it could not assign the position to isotopes. He also left some gaps in the periodic table. 3(a) state Mendeleev's Periodic Law. 3(b) Why did Mendeleev leave some gaps in the Periodic table? 3(c) if the letter 'R' was used to represent any of the elements in the group , then the hydride and oxide of carbon would respectively be represented as (i) RH_4 , RO (ii) RH_4 , RO_2 (iii) RH_2 , RO_2 (iv) RH_2 , RO 3(d) isotopes are (i) atoms of an element with similar chemical properties but different atomic masses. (ii) atoms of different elements with similar chemical properties but different atomic masses. (iii) atoms of an element with different chemical properties but same atomic masses. (iv) atoms of different elements with different chemical properties but same atomic masses.