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TLS Online TPP Program

#Question id: 405

When a mixture of glucose 6-phosphate and fructose 6-phosphate is incubated with the enzyme phosphohexose isomerase (which catalyzes the interconversion of these two compounds) until equilibrium is reached, the final mixture contains twice as much glucose 6-phosphate as fructose 6-phosphate.  Which one of the following statements is best applied to this reaction outlined below? (R = 8.315 J/mol·K; T = 298 K) Glucose 6-phosphate -> fructose 6-phosphate

#Biochemistry

  1. DG'° is incalculably large and negative.

  2. DG'° is –1.72 kJ/mol.

  3. DG'° is  zero.

  4. DG'° is +1.72 kJ/mol.

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TLS Online TPP Program

#Question id: 40409

#Applied Microbiology

 Match the biological material or entity in Column A with its correct description or patenting context in Column B.

Column A (Entity)Column B (Context)
1. SuperbugA. Subject of a successful challenge based on traditional knowledge.
2. Turmeric (wound healing)B. First patented genetically modified mammal.
3. OncomouseC. Genetically engineered bacterium for oil spills, ruled patentable.
4. Neem (fungicidal properties)D. Patent revoked after opposition proved prior use in India.
TLS Online TPP Program

#Question id: 40410

#Applied Microbiology

Read the following assertion and reason and select the correct option.

    Assertion (A): A synthetic chemical like DDT is not considered a "biological material" in the context of biopatents.

      Reason (R): Biological materials for patenting purposes must be living organisms or substances naturally produced by them.
      TLS Online TPP Program

      #Question id: 40411

      #Applied Microbiology

      Arrange the correct sequence of color changes observed in a Gram-negative bacterium during the Gram staining process at each step:

      1. After Crystal Violet

      2. After Safranin

      3. After Alcohol decolorization

      4. After Iodine treatment
      TLS Online TPP Program

      #Question id: 40412

      #Applied Microbiology

      Match the Reagents in List-I with their specific role/function in List-II.

      List-I (Reagent)List-II (Function)
      (A) Crystal Violet(I) Mordant (Fixes the dye)
      (B) Gram's Iodine(II) Counterstain
      (C) 95% Ethyl Alcohol(III) Primary Stain
      (D) Safranin(IV) Decolorizing Agent
      TLS Online TPP Program

      #Question id: 40413

      #Applied Microbiology

      Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

        Assertion (A): After the washing with alcohol (decolorization step), Gram-positive bacteria retain the purple color, while Gram-negative bacteria become colorless.

          Reason (R): Gram-positive bacteria have a thick peptidoglycan layer that traps the Crystal Violet-Iodine complex, whereas Gram-negative bacteria have a high lipid content in their outer membrane which dissolves in alcohol.
          TLS Online TPP Program

          #Question id: 40414

          #Applied Microbiology

          1. Read the following statements regarding the Gram staining technique.
              1. Statement I: Heat fixing is done after adding the crystal violet stain to the slide.
              1. Statement II: Ideally, the iodine solution (mordant) should be kept on the smear for approximately 1 minute.