MCQ on Plant Sciences

 

1. The closest wild relative of maize is
   A. Zea mays
   B. Zea luxurians
   C. Zea mexicana
   D. Zea diploperennis

2. A condition in which both male and female inflorescence is spatially separated on the same plant is called
   A. Protogynous
   B. Monoecious
   C. Bisexual
   D. Cleistogamous

3. The male inflorescence in maize is referred to as
   A. Cob
   B. Tassel
   C. Silk
   D. Ear

4. The structural changes of a chromosome where two non-homologous chromosomes are involved is
   A. Deletion
   B. Duplication
   C. Inversion
   D. Translocation

5. A plant species that shows asymmetric karyotype is indicative of
   A. Primitive species
   B. A highly evolved species
   C. A low evolved species
   D. A neutral species

6. On longarm of chromosome no. II of Drosophila, loci controlling star eyes and vestigial wings are located at 13 cM and 67.0 cM from centromere. What is the map distance between the two loci?
   A. 65.0 cM
   B. 67.0 cM
   C. 55.7 cM
   D. 67.5 cM

7. If the number of linkage groups in tomato is 11, the chromosome number of a somatic cell will be
   A. 20
   B. 22
   C. 21
   D. 24

8. Maximum variability can be manifested in
   A. F₁
   B. F₂
   C. F₃
   D. F₁ generation

9. Which of the following is responsible for stimulating DNA synthesis in plants
   A. Auxins
   B. Cytokinins
   C. Gibberellins
   D. Ethylene

10. The correct order of molecules involved in DNA synthesis shall be
    A. DNA, Topoisomerase, DNA pol, SSP, DNA ligase, Primase
    B. DNA, Topoisomerase, SSP, DNA pol, Primase, DNA ligase
    C. DNA, Topoisomerase, SSP, Primase, DNA pol, DNA ligase
    D. DNA, Topoisomerase, Primase, SSP, DNA ligase, DNA pol

11. A synthetic variety is developed by bulking the seeds from the
    A. Open pollinated plants
    B. Inbred lines tested for combining ability
    C. Inbred lines not tested for combining ability
    D. Hybrid plants

12. The mechanism that promotes 100 per cent self-pollination
    A. Herkogamy
    B. Cleistogamy
    C. Male sterility
    D. Monoecious

13. BLAST-n compares
    A. DNA sequence with amino acid sequence
    B. DNA sequence with RNA sequence
    C. A DNA sequence with another DNA sequence
    D. Protein sequence with RNA sequence

14. Two essential features for a chromosome to survive are
    A. Telomere & Nucleosome
    B. Telomere & Centromere
    C. Telomere & Chromatin
    D. Telomere & Centromere

15. Colour blindness in humans is caused by a recessive gene located on
    A. X-chromosome
    B. Y-chromosome
    C. Autosomes
    D. Both X and Y chromosomes