botany for PMT

botany for PMT 

PMT Sample Question Botany
Free Botany Online Practice Test
1. Pyruvic acid is produced at the end of:
(a) Calvin cycle
(b) Krbs cycle
(c) EMP pathway
(d) PP pathway
Ans. (c)
2. The structure that regulates the entry and exit of a material or molecule in cell is:
(a) Plasma membrane
(b) Cell wall
(c) Nuclear membrane
(d) Tonoplast
Ans. (a)
3. Heterothallism is common in:
(a) Rhizopus
(b) Cycas
(c) Mangifera
(d) Pisum
Ans. (a)
4. Oxidative phosphorylation means formation of:
(a) ATP in photosynthesis
(b) ATP in respiration
(c) Use ofO₂ in photosynthesis
(d) Excretion ofO₂’in respiration
Ans. (b)
5. Cystolith is made up of:
(a) Calcium oxalate
(b) Calcium carbonate
(c) Calcium phosphate
(d) Calcium silicate
Ans. (b)
6. In a lake ecosystem the dominant second trophic level is of:
(a) Phytoplanktons
(b) Zooplanktons
(c) Snakes
(d) Birds
Ans. (b)
7. Exchange of chromosome segment between maternal and paternal chromatfds during meiosis is called:
(a) Linkage
(b) Crossing over
(c) Dominance
(d) Meiosis
Ans. (b)
8. Two similar holotypes are called:
(a) Mesotype
(b) Syntype
(c) Isotype
(d) Neotype
Ans. (c)
9. Girdling experiment cannot be performed in sugarcane because:
(a) Vascular bundles are scattered
(b) Vascular bundles are in ring
(c) It is unbranched
(d) It is delicate can not withstand injury
Ans. (a)
10. The histogen layer present at the apex of root tip is:
(a) Dermatogen
(c) Periblem
(b) Calyptrogen
(d) Plerome
Ans. (b)
11. Vivipary is found in:
(a) Cicer
(c) Ricinus
(b) Rhizophora
(d) Maize
Ans. (b)
12. Important effect of SQ2 and its transformation products on plants is;
(a) Plasmolysis
(b) Destruction of cell wall
(c) Destruction of chloroplast
(d) Destruction of mitochondria
Ans. (d)
13. A Polygonum type of embryo sac is:
(a) 7 celled, 8 nucleate
(b) 8 celled, 7 nucleate
(c) 7 celled, 7 nucleate
(d) 8 celled, 8 nucleate
Ans. (c)
14. The mass flow hypothesis was first described by:
(a) Buchner
(c) Kurosawa
(b) Munch
(d) Swanson
Ans. (a)
15. Cytokinin stimulate cell for:
(a) Elongation
(b) Division
(c) Wall thickening
(d) Increase
Ans. (b)
16. The rate at which light energy is converted into chemical energy of organic molecules is known as ecosystems
(a) Net primary productivity
(b) Gross primary productivity
(c) Net secondary productivity
(d) Gross secondary productivity
Ans. (b)
17. Damage ofO3 layer is due to the harmful effect of:
(a) CO₂
(b) SO₂
(c) O₂
(d) Chlorofluorocarbons
Ans. (d)
18. Oxysomes are present on:
(a) Cell wall
(b) Outer membrane of mitochondria
(c) Inner membrane of mitochondrial cristae
(d) Cytoplasmic membrane
Ans. (c)
19. The chief function of parenchymatous tissue is to:
(a) Synthesize food
(b) Store food
(c) Absorb moisture
(d) Conduct food
Ans. (b)
20. Low temperature treatment is called:
(a) Pasteurization
(b) Vernalization
(c) Photomorphism
(d) Fermentation
Ans. (b)
21. Which of the following type of RNA molecule is essential for protein synthesis?
(a) n-RNA
(b) t-RNA
(c) r-RNA
(d) s-RNA
Ans. (a)
22. When two genetic loci produce identical phenotype in cis-trans position, they are considered as?
(a) Pseudoalleles
(b) Multiple alleles
(c) Different genes
(d) Allelomorphs
Ans. (a)
23. Cochineal insects are useful for:
(a) Weed control
(b) Herbicide
(c) Pesticide
(d) Cactus control
Ans. (d)
24. Rotenone is:
(a) An insect hornuSne
(b) A bioherbicide
(c) A natural insecticide
(d) A natural weedicide
Ans. (c)
25. Most totipotent cell regarding plant tissue culture is:
(a) Xylem vessel
(b) Xylem tracheids
(c) Collenchyma
(d) Meristematic cell
Ans. (c)