10 MCQ on Plant Science for various Agriculture Exams✅ Part -71

 

1. Transformation in bacteria was studied for the first time in
   a. Escherichia coli
   b. Bacillus subtilis
   c. Streptococcus pneumoniae
   d. Staphylococcus aureus

2. Type of plasmogamy that occurs in downy mildew pathogen is
   a. Gametangial contact
   b. Gametangial copulation
   c. Somatogamy
   d. Spermatization

3. Which of the following crop seed is more sensitive to mechanical damage
   a. Sorghum
   b. Wheat
   c. Black gram
   d. Soybean

4. The unit of gene function or production of polypeptide
   a. Muton
   b. Recon
   c. Cistron
   d. Intron

5. The substance responsible for the earthy odour after the first showers in summer is
   a. Geoflavin
   b. Geomycin
   c. Geosmin
   d. Streptomycin

6. The recipient parent used in backcross programme is generally known as
   a. Recurrent parent
   b. Non recurrent parent
   c. Donor parent
   d. Backcross parent

7. In hybrid seed production plots border rows are planted with
   a. Female parent
   b. Male parent
   c. Recurrent parent
   d. Maintainer parent

8. In pedigree method, selection starts from
   a. F6 generation
   b. F2 generation
   c. F10 generation
   d. F1 generation

9. Streptomycin was discovered by
   a. Alexander Fleming
   b. Louis Pasteur
   c. Robert Koch
   d. Selman Waksman

10. How many successive mitotic divisions need to occur in a cell to produce 256 daughters?
    a. 64
    b. 128
    c. 32
    d. 8