Isopentenyl adenine, a species of cytokinin, differs from zeatin in that
A. A methyl greup is present at the third carbon position in place of the hydroxyl group
B. An ethyl group is present at the third carbon position in place of the hydroxyl group
C. A hydroxyl group is present at the third carbon position in place of the methyl group
D. A methyl group is present at the third carbon position in place of the aldehyde group
Answer: Option A
This Question Belongs to Biology GK Chapter Wise >> Plant Anatomy And Physiology
A. Cinnamomum - Amoora association
B. Bischofia - Dillenia association
C. Shorea - Lagerstroemia association
D. Mesua - Michelia association
Which of the following react with haemoglobin, forming methemoglobin which will not take up oxygen?
A. Nitrates
B. Nitrites
C. Carbides
D. Oxides
Internally, hydathode shows a group of loosely arranged parenchymatous cells called as
A. Epiderm
B. Epithelium
C. Ampithecium
D. Epithem
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