Class 11-Biology-chapter 13-Plant Growth and Development InstructionTotal Questions : 20Total time :20 minTotal Marks : 20 x 3 = 60 MarksEach Correct Question carries : 3 MarksEach incorrect Question Carries : -1 MarksEach Unattempted Question carry : 0 MarksBe careful On Negative Markings 1. Growth hormone that speeds up malting in brewery industry is Auxin Gibberellic acid Ethylene Kinetin None 2. Abscisic acid is called stress hormone as it Promotes leaf fall Induces flowering Promotes stomatal closure Breaks seed dormancy None 3. Which of the following is the effect of a plant hormone, which is synthesised more in absence of light? Induces the dormancy of seeds Inhibits the development of seedless fruits Responsible for closing of stomata Length of intenodes increases None 4. Transport of cytokinin in the plant body is On all sides Basipetal Lateral Acropetal None 5. Which statements are correct?𝑎- Cytokinins suppress the synthesis of chlorophyll𝑏- Auxins control apical dominance𝑐- Gibberellins promote shoot elongation𝑑- Abscisic acid enables seeds to with-stand desication. 𝑏 and 𝑐 only 𝑏 , 𝑐 and 𝑑 only 𝑎 and 𝑐only 𝑎 and 𝑏 only None 6. During seed germination, its stored food is mobilised by ABA Gibberellin Cytokinin Ethylene None 7. Which is not a function of cytokinin? Promoting stomatal opening Breaking seed dormancy Promoting bud dormancy Delay is senescence None 8. Plant hormones used for inducing morphogenesis in plant tissue culture is Gibberellins Ethylene Cytokinins ABA None 9. The cells derived from meristems differentiate and regain the capacity to divide by a phenomenon called Differentiation Totipotency Dedifferentiation Redifferentiation None 10. Cytokinins which have specific effect in cytokinesis are modified forms of Thiamine Adenine Cytosine Guanine None 11. Two different plants associated with discovery of two different phytohormones having common biosynthetic precursor exhibit one of the following characters eachI. Versatile anthers II. Compound spadix III. Pentalocular ovary IV. Trifoliate compound leaves II and IV I and III II and III I and IV None 12. Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of a freshly cut coleoptile stumps. Of what significance is this experiment. It made possible the isolation and exact identification of auxin It is basis of quantitative determination of small amounts of growth promoting substances It demonstrated polar movement of auxins It supports the hypothesis that IAA is auxin None 13. Shedding of leaves, flowers and fruits due to change in hormone balance in plants is Senescence Photoperiodism Abscission Vernalisation None 14. Which of the following plant function is not controlled by auxins? Apical dominance Photosynthesis Growth Photoperiodism None 15. One hormone hastens the maturity period in juvenile conifers, a second hormone controls xylem differentiation while the third increases the tolerance of plants to various stresses. They are respectively Gibberellin, auxin, cytokinin Auxin, gibberellin and cytokinin Gibberellin, auxin, ABA Gibberellin, auxin, ethylene None 16. Period between formative phase and maturation phase of plant growth is Lag phase Grand period of growth Stationary phase Phase of elongation None 17. Cytokinin is not found in Mature fruits Shoot apex Root apex Young fruits None 18. Cholodony and Went effect is due to GA IAA ABA Cytokinin None 19. Horizontal growth of seedlings, swelling of axis and apical hook formation in dicot seedlings is brought about by Kinetin Gibberellins Ethylene Auxins None 20. Which is not the effect of ethylene? Breaks seed and bud dormancy Helps to overcome apical dominance Brings about horizontal growth of seedlings Promotes senescence and abscission of plant organs None Time's upTime is Up! Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.