1. Which is the most common carbon source used in the plant cell culture media?
A.Sucrose
B.Glucose
C.Fructose
D.Maltose

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2. Which of the following is an ethylene biosynthesis inhibitor?
A.Citric acid
B.Succinic acid
C.Activated charcoal
D.Silver thiosulphate

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3. Nitrogen in the plant cell culture media is provided by either ammonia or nitrate salt. In the media
A.utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise
B.utilization of nitrate cause culture pH to drop while utilization of ammonium cause culture pH to rise
C.utilization of both ammonium and nitrate result in rise in pH
D.utilization of both ammonium and nitrate result in drop in pH

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4. Which of the following growth regulator is added for short initiation during plant regeneration from callus?
A.Auxins
B.Cytokinins
C.Gibberellins
D.Brassinosteroids

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5. Which of the following growth regulator promote cell division?
A.Auxins
B.Cytokinins
C.Gibberellins
D.Brassinosteroids

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6. Which of the following growth regulator is used to stimulate embryo or shoot development?
A.Auxins
B.Cytokinins
C.Gibberellins
D.Brassinosteroids

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7. Which of the following growth regulator cause plant cells to grow?
A.Auxins
B.Cytokinins
C.Gibberellins
D.Brassinosteroids

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