Test Your Knowledge - BOTANY MCQ PRACTICE
by Saksham Chaudhry : Lancers Convent, Prashant Vihar, New Delhi 110085
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A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. Pruning of plants promotes branching because the axillary buds get sensitized to
A. Ethylene 
B. Gibberellin 
C. Cytokinin 
D. lndole acetic acid 

2. On the basis of symptoms of chlorosis in leaves a student inferred that this was due to deficiency of nitrogen. The inference could be correct only if we assume that yellowing of leaves appeared first in
A. old leaves 
B. young leaves 
C. young leaves followed by mature leaves 
D. mature leaves followed by young leaves 

3. The sequence of spores produced in the wheat rust life cycle is
A. basidiospores, aeciospores, pycniospores, and teliospores 
B. teliospores, basidiospores, uredospones and pycniospores 
C. teliospores, aeciospores, uredospores, and basidioqaores 
D. aeciospores, uredospores, teliospores, basidiospores, and pycniospores 

4. The secondary wood of Pinus is characterised by
A. Presence of vessels 
B. Absence of resin ducts 
C. Presence of resin ducts 
D. Presence of resin canals 

5. Which one of the following categories of organisms do not evolve oxygen during photosynthesis?
A. Red algae 
B. Photosynthetic bacteria 
C. plants with Kranz anatomy 
D. Blue green algae 

6. The part of the plant where metabolism talres place is called
A. Underground 
B. Sub-aerial 
C. Aerial 
D. All the above 

7. Which one of the followlng is a correct statement
A. The anticoagulant hirudin is being produced from transgenic Brassica napus seeds 
B. ‘Flaw Savor" variety of tomato has enhanced the production of ethylene which improves its taste 
C. "Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology 
D. Somatic hybridisation involves fusion of two complete plant cells carrying desired genes 

8. The fruiting body of Aspergillus or Penicillium is
A. Hypanthodium 
B. Peritheium 
C. Apothcium 
D. Cleistothecium 

9. Which one of the following pairs is correctly matched
A. Rhizobium - Parasite in ‘the roots of leguminous plants 
B. Mycorrhime - Mineral uptake from soil 
C. Yeast - Production of biogas 
D. 4. Myxomycetes - The disease ring worm 

10. Which one of the following is the earliest land plant ?
A. Cooksonia 
B. Cordaites 
C. Homea 
D. Rhynia 

11. Which of the following is responsible for rapid loss of water from plant
A. Water vapour saturation deficit 
B. Water vapour saturation of air 
C. More available soil water to the plant 
D. 4 None of the above 

12. What might be the best strategy to prevent ecological damage due to acid rain?
A. Stock the lakes with bigger fish so that they can resist the effects of the acid better. 
B. Reduce the amount of fossil fuels that are burnt 
C. Supply plants with excess phosphorus and water 
D. Supply fungi with excess sugars and aininoacids 

13. Tracheids of anglospems are recognised by the presence of
A. Scalaiform perforation plates 
B. Scaiaiionn thickening 
C. Bordeied pits 
D. None of the above 

14. Photosynthetic Active Radiation PAR has the following range of wavelengths
A. 400-700nm 
B. 450-950nm 
C. 340-450nm 
D. 4500-600nm 

15. Which one of the following normally have cross pollination but are adapted for self pollination
A. Wheat 
B. Sunflower 
C. China rose 
D. Mustard 

16. The best definition of species is
A. group of organisms that occupy the same niche 
B. population that works together to defend itse1f from predators 
C. group of organisms that can mate with each other 
D. population that preys on other populations 

17. Grain colour in wheat is determined by three pairs of polygene. Following the cross AABBCC. dark colour x aabbcc light colour, in F, generation what proportion of the progeny is likely to resemble either parent?
A. Half 
B. Less than 5 percent 
C. One third 
D. None of the above 

18. Which compound captures light energy in plants?
A. Oxygen 
B. Carbon dioxide 
C. Water 
D. Chlorophyll 

19. Krebs was awarded Nobel Prize in 1953 for explaining
A. Oxidation of cytoplasm 
B. Respiration chain 
C. ATP metabolism 
D. Energy forming process in the cell 

20. Cose relation between flower and pollinating agent is best exhibited by
A. Sa1vi 
B. Aven 
C. Cocos 
D. Yucca 

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