Plant Physiology Questions And Answers.


1.Growth regulators, which control plant growth and development are called?
A. Secondary metabolites
B. Macro element
C. Nonessential elements
D. Phytohormone

2.Which of the following is NOT a plant hormone?
A. Corticosteroid
B. Brassinosteroid
C. Polyamines
D. Salicylic acid

3.Name the plant in which auxin was first discovered?
A. Mustard
B. Pea
C. Oats
D. Rice

4.Which of the following is NOT a naturally occurring auxin?
A. Indole 3-acetic acid (IAA)
B. Indole 3-butyric acid (IBA)
C. Phenyl acetic acid (PAA)
D. 2,4-D

5.Name the amino acid which acts as a precursor of auxin biosynthesis?
A. Serine
B. Tryptophan
C. Valline
D. Tyrosine

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