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CSS :: Plant Physiology


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171.  Tonoplast is a differentially permeable membrane surrounding the:
A. Mitochondria B. Cytoplasm
C. Vacuole D. Nucleus

172.  Cell organelle found only in plants is:
A. Mitochondria B. Golgi complex
C. Ribosomes D. Plastids

173.  Chlorophyll contains:
A. Mn B. Fe
C. K D. Mg

174.  Organisms, which fix atmospheric nitrogen in the soil, are found among:
A. Mosses B. Green algae
C. Soil fungi D. Bacteria

175.  Which of the following is a weed killer?
A. N.A.A. B. 2,4-D
C. ABA D. GA

176.  In the nodules of roots in leguminous plants we find:
A. N2 producer bacteria B. Denitrifying Bacteria
C. N2 fixing bacteria D. Nitrifying bacteria

177.  When chlorophyll is burnt which one is obtained?
A. Na B. Mn
C. Mg D. Ca

178.  The following is a naturally occurring growth inhibitor:
A. NAA B. GA3
C. ABA D. 1AA

179.  Which is not essential micronutrient?
A. Ni B. Co
C. Mn D. B

180.  During 24 hours there is a time when plants neither give O2 nor CO2. This is the time of:
A. Night B. Day light
C. Twilight D. None of these




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