10 MCQ on Plant Science for various Agriculture Exams ✅ Part -31

1. Widal test is used to diagnose
   a. Typhoid
   b. Schilder
   c. Salmon
   d. Malaria

2. The disease which is transmitted by mosquitoes is
   a. Malaria
   b. Leprosy
   c. Malarial fever
   d. Chickenpox

3. Powdery mildew disease is transmitted by
   a. White flies
   b. Thrips
   c. Mealy bugs
   d. Aphids

4. Ground nut bud necrosis disease is transmitted by
   a. Aphids
   b. Mealy bugs
   c. Thrips
   d. White flies

5. Plant disease caused by Xanthomonas oryzae is
   a. Xyella fastidiosa
   b. Bacterial blight
   c. Xanthomonas
   d. Xylella fastidiosa

6. Bacterial soft rot of vegetables is characterized by
   a. Pectolytic enzyme
   b. Ribonuclease
   c. Polyphenol oxidase
   d. None

7. The order of sequences are called
   a. Exons
   b. Introns
   c. Mutons
   d. Recon

8. Polytene chromosome is found in
   a. Reproductive active segment of the chromosomes
   b. Non reproductive active segment of chromosomes
   c. Synctium
   d. Allopathy

9. The position where the pollen rests from flower or ovule is called
   a. Pollen grain
   b. Germination
   c. Stigma
   d. Ovule

10. The example of selective toxic is
    a. Crescporin
    b. Penicillin
    c. Vaccine
    d. Fungicide

11. An example of effective host is
    a. Foundation seed
    b. Certified seed
    c. Hybrid seed
    d. Foundation seed

12. In CBSV second stage
    a. 8 loaves
    b. 6 loaves
    c. Certified seed stage
    d. Certified seed stage

13. A mutation which substitutes one amino acid for another is
    a. Silent mutation
    b. Non sense mutation
    c. Missense mutation
    d. Sense mutation

14. According to Chargaff's rule in DNA,
    a. A = G
    b. A = T
    c. A = C
    d. A = G

15. The classical Mendelian traits are
    a. Additive
    b. Complex
    c. Quantitative
    d. Polygenic

16. An example of virus containing ds DNA
    a. Gemini virus
    b. Caulimovirus
    c. Tobamvirus
    d. Tobravirus