Gram +ve bacteria on treatment with crystal violet dye give _________colour?

Related Mcqs:

1. Gram positive bacteria appear_______________?

   A. Purple
   B. Red
   C. Pink
   D. Blue

2. The plant dye Henna imparts orangered colour to skin and hairs due to its reaction with which of the following?

   A. Lipids
   B. Carbohydrates
   C. Amino acids
   D. Protein and amino acids

   Submitted by: Rashid Mehmood

3. Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane?

   A. Change in membrane protein composition.
   B. Change in the solute composition of the cell membrane which prevents crystallization.
   C. Increase in proportion of unsaturated fatty acids.
   D. Development of heat shock proteins.

4. The word which E-Chatton suggested for bacteria and blue green algae was_____________?

   A. Autotrophs
   B. Heterotrophs
   C. Pro-cariotique
   D. Eu-cariotique

5. Nodules on roots of leguminous plants have __________ bacteria?

   A. Anaerobic
   B. Nitrogen fixing
   C. Nitrifying
   D. Ammonifying

6. Approximately _____ species of bacteria are known to cause diseases in humans.

   A. 100
   B. 200
   C. 300
   D. 400

7. Some bacteria ranging occasionally a size of 500 ?m in length are___________________?

   A. Escherichia coli
   B. Spirochetes
   C. Mycoplasma
   D. Epulopiscuim

8. Nitrifying bacteria are the examples of___________?

   A. Hetrotrophic bacteria
   B. Chemosynthetic bacteria
   C. Saprophytic bacteria
   D. Parasitic bacteria

9. Which of the following bacteria do not have flagella commonly__________?

   A. Cocci
   B. Bacilli
   C. Streptobacilli
   D. Vibrio

10. Bacteria protect themselves from viruses by fragmenting viral DNA with ____________?

    A. Ligase
    B. Endonuclease
    C. Exonuclease
    D. Gyrase

    Submitted by: Maria Aziz