Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 65566
TLS Online TPP Program

#Question id: 40491

Assertion (A): Foods like jams and jellies rarely undergo bacterial spoilage even at room temperature.

    Reason (R): High concentrations of sugar reduce the water activity (aw), creating hypertonic conditions that dehydrate bacteria (plasmolysis).

    #Applied Microbiology
    1.  Both (A) and (R) are true, and (R) is the correct explanation of (A).
    2. Both (A) and (R) are true, but (R) is not the correct explanation of (A). 
    3. (A) is true, but (R) is false. 
    4.  (A) is false, but (R) is true.
    More Questions
    TLS Online TPP Program

    #Question id: 37972

    #Plant Biotechnology

    Statement I: Commitment to androgenesis is achieved mainly by the overexpression of pollen maturation ('late') genes.
    Statement II: In wheat, the synthesis of a metallothionein-like protein during induction is regulated by Abscisic Acid (ABA).
    TLS Online TPP Program

    #Question id: 37973

    #Plant Biotechnology

    Statement I: In cereal species like rice and wheat, modifying the medium composition can determine whether the cell mass forms an embryo or a callus.
    Statement II: The formation of a callus versus a globular embryo is strictly dependent on the temperature and cannot be influenced by the species type.
    TLS Online TPP Program

    #Question id: 37974

    #Plant Biotechnology

    Which of the following phenomena is primarily responsible for the wide variation in ploidy levels observed in plants regenerated from anther or microspore culture?
    TLS Online TPP Program

    #Question id: 37975

    #Plant Biotechnology

    In the context of determining ploidy in potato plants using stomatal guard cells, a chloroplast count of 18–24 per guard cell indicates that the plant is:
    TLS Online TPP Program

    #Question id: 37976

    #Plant Biotechnology

    Which staining agent is specifically recommended for determining ploidy by counting the number of nucleoli?
    TLS Online TPP Program

    #Question id: 37977

    #Plant Biotechnology

    List I (Method)List II (Feature)
    A. Flow Cytometry1. Counts plastids in stomata
    B. Chromosome Number2. Uses Acetocarmine stain
    C. Nucleoli Count3. Measures Nuclear DNA content
    D. Indirect Method4. Distinguishes 1 vs 2 organelles