Ncert – class 10- science – Chapter 6 – Control and Coordination 2 Welcome to your Ncert - class 10- science - Chapter 6 – Control and Coordination 2 1. To speed up the malting process in brewing industry the growth hormone used is ____________. ethylene kinetin gibberellin auxin None 2. In plant tissue culture experiments, high auxin to cytokinin ratio favours .............. development and high cytokinin to auxin ratio favours .............. development. Shoot, shoot Root, shoot Shoot, root Root, root None 3. In the context of rice diseases, match List-I with List-II using the codes given the lists. List-IList-IIa. Helminthosporium oryzae1. Gibberella fujikuroib. Rhizoctonia solani2. Balanisa oryzaec. Fusarium moniliforme3. Cochliobolus miyabeanusd. Ephelis oryzae4. Corticium sasaki A- 4 , B- 3 , C- 1 , D- 2 A- 3 , B- 4 , C- 1 , D- 2 A- 2 , B- 3 , C- 4, D- 1 A- 3, B- 4, C- 2 , D- 1 None 4. Which of the following hormones is not a growth promoter ? Abscisic acid Auxin Cytokinin Gibberellin None 5. Which of the following statements are correct?I. Pars intermedia secretes MSHII. Leydig's cell secretes progesteroneIII. Melatonin is secreted by the pineal glandIV. Myxoedema is a thyroid disorder V. Neurohypophysis secretes ACTH II, IV and V I, IV and V II, III and V I, III and IV None 6. Hormones used to speed up malting in barley, promote flowering in pineapple and delaying leaf senescence in plants are------------------ respectively. Cytokinin, Auxin, Gibberellin Gibberellin, Auxin, Cytokinin Gibberellin, Cytokinin, Auxin Auxin, Gibberellin, Cytokinin None 7. Select the correct statement regarding the Schwann cells. Found in Haversian system of bones Form basement membrane of epithelium. Support muscle fibres Surround axon of myelinated nerve fibre None 8. Tendrils and twiners come in contact with their support by means of Nutation Thigmotropism Anemotropism Thigmonasty None 9. Which among the following hormones is toxic to plants in large concentrations, regulates protein synthesis and causes bud formation and root initiation? Ethylene Gibberellins Auxin Cytokinin None 10. Choose the correct answer from the alternatives given.The plant hormone that causes cell elongation is: indole 3-acetic acid abscisic acid ethylene citric acid None 11. Which of the following is synthesized in a very small amount, sometimes it is strictly polarized or transported in a unidirectional manner from where they are synthesized to other parts? Organic compound Water & mineral ions All the above Plant growth regulators None 12. Match the columns and choose the correct combination. table { border-collapse: collapse; width: 100%; } th, td { border: 1px solid #dddddd; text-align: left; padding: 8px; } th { background-color: #f2f2f2; }III(a) Cytokinin(p) Stress hormone(b) Auxins(q) Ripening of fruits(c) Abscisic acid(r) Apical dominance (d) Ethylene(s) Bolting (t) Richmond-Lang Effect a - t, b - r, c - p, d - q a - r, b - s, c - q, d - p a - t, b - r, c - p, d - s a - q, b - s, c - t, d - r, None 13. Geotropic response of root is due to Lower rate of growth in the stem Higher rate of growth in the stem Higher growth on upper side of root Higher auxin content of stem None 14. Match the plant hormones listed in column I with their major role listed in column II and select the corret option from the codes given below. Column IColumn II(A) Auxin(i) Fruit ripening(B) Cytokinin(ii) Phototropism(C) Abscisic acid(iii) Suppression of cell division(D) Ethylene(iv) Stomatal opening and closing (v) Growth of lateral buds A - (ii), B - (v), C - (iv), D - (i) A - (v), B - (iii), C - (iv), D - (ii) A - (ii), B - (iv), C - (v), D - (iii) A - (iii), B - (ii), C - (iv), D - (i) None 15. Choose the correct answer from the alternatives given.The mitotically active and hormone producing cells are: phloem meristem xylem cortex, None 16. Read the following five statements (i) to (v) regarding left cerebral hemisphere and select the option that correctly states the true (T) and false (F) statements.(i) It receives most modalities of sensory information from the right side of the body.(ii) It is usually larger than the right cerebral hemisphere.(iii) It is the dominant cerebral hemisphere in most individuals.(iv) It is connected to the right cerebral hemisphere by the corpus callosum.(v) It contains the main areas for the understanding and production of speech in most individuals. (i) - T, (ii) - F, (iii) - T, (iv) - T, (v) - T (i) - T, (ii) - T, (iii) - F, (iv) - F, (v) - F (i) - F, (ii) - T, (iii) - T, (iv) - F, (v) - T (i) - F, (ii) - F, (iii) - T, (iv) - T, (v) - T None 17. More concentration of auxin in horizontally placed plants, under the influence of gravity, occurs in Upper side Lower side None of the above Both upper and lower side None 18. If you see a tiger running towards you and you felt that your respiration and heartbeat has started increasing and then you also started running. Which hormone has been responsible for this? Thyroxine Noradrenaline Cortisol Both A and B None 19. Choose the correct answer from the alternatives given.Bakane disease of rice plants is due to the effect of: gibberellins ethylene cytokinins auxins None 20. A typical neuron has a myelin sheath insulating its axon. It is formed from cells known as Schwann cells. Some nervous system disorders, such as adrenoleukodystrophy result from the deterioration of the myelin sheath.Why is the myelin sheath important to the correct functioning of the neuron? Gaps in the myelin sheath allow for saltatory conduction, where electrical impulses jump from one covered area to another None of these The myelin sheath blocks external signals that originate outside the neuron, preventing interference with nervous signal transmission The surface of the myelin sheath carries many receptors for neurotransmitters, allowing the neuron to receive chemical signals None Time's 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.
