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TLS Online TPP Program

#Question id: 2588

Which of the following statement is correct regarding attachment of microtubule to the kinetochore?

#Unit 2. Cellular Organization

  1. Once a kinetochore is attached laterally or terminally to a microtubule, dynein-dynactin associates with the kinetochore to move the duplicated chromosome down the microtubule toward the spindle pole. This movement eventually results in an end-on attachment of the microtubule to one kinetochore.

  2. Once a kinetochore is attached laterally or terminally to a microtubule, kinesin associates with the kinetochore to move the duplicated chromosome down the microtubule toward the spindle pole. This movement eventually results in an end-on attachment of the microtubule to one kinetochore.

  3. Once a kinetochore is attached laterally or terminally to a microtubule, myosin associates with the kinetochore to move the duplicated chromosome down the microtubule toward the spindle pole. This movement eventually results in an end-on attachment of the microtubule to one kinetochore.

  4. Kinesin-13 provides the strongest force pulling the chromosome pair toward the more distant pole. This movement requires simultaneous shortening of the microtubule, which is enhanced by kinetochore-localized dynein-dynactin.

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TLS Online TPP Program

#Question id: 12642

#Unit 6. System Physiology – Plant

The systemic production of proteinase inhibitors in young tomato plants is triggered by a complex sequence of events such as;
1) Prosystemin is proteolytically processed to produce the short polypeptide called systemin
2) Systemin is then transported out of the wounded leaf via the phloem.
3) systemin is believed to bind to a site on the plasma membrane and initiate the biosynthesis of jasmonic acid
4) Wounded tomato leaves synthesize prosystemin, a large recursor protein
5) Systemin is released from damaged cells into the apoplast
6) Jasmonic acid eventually activates the expression of genes that encode proteinase inhibitors
Arrange the correct sequence of given above following statements ;
TLS Online TPP Program

#Question id: 12643

#Unit 6. System Physiology – Plant

Which of the following is the first polypeptide hormone discovered in plants?
TLS Online TPP Program

#Question id: 12644

#Unit 6. System Physiology – Plant

Which of the following plant hormone is synthesized from the lipids?
TLS Online TPP Program

#Question id: 12645

#Unit 6. System Physiology – Plant

Classes of secondary metabolites, have strong antimicrobial activity have been proposed to function as defenses against pathogens in the intact plant these are_____X_______,  a group of triterpenes thought to disrupt fungal membranes by binding to sterols
TLS Online TPP Program

#Question id: 12646

#Unit 6. System Physiology – Plant

A major jasmonic acid signaling pathway is involved in most plant defenses against insect herbivores is the____
TLS Online TPP Program

#Question id: 12647

#Unit 6. System Physiology – Plant

Other oxygenated fatty acid-derived products, octadecanoids belong to the family of___