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TLS Online TPP Program

#Question id: 2570

 How is plant cell cytokinesis different from animal cell cytokinesis?

#Unit 2. Cellular Organization

  1. The contractile filaments found in plant cells are structures composed of carbohydrates; the cleavage furrow in animal cells is composed of contractile proteins.

  2. Plant cells deposit vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow.

  3. The structural proteins of plant cells separate the two cells; in animal cells, a cell membrane separates the two daughter cells.

  4. Plant cells divide after metaphase but before anaphase; animal cells divide after anaphase.

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TLS Online TPP Program

#Question id: 12188

#Unit 2. Cellular Organization

The series of events by which APC/C promotes the separation of sister chromatids at anaphase.
A. all the kinetochores have attached to spindle microtubules and the spindle apparatus is properly assembled and oriented.
B. Cdc20 specificity factor associated with APC/C directs it to ubiquitinylate securin and mitotic cyclins. 
C. A protease known as separase cleaves the cohesin subunit Scc1 (Rad21), breaking the protein circles linking sister chromatids.
D. anaphase begins as poleward force exerted on the kinetochores moves the split sister chromatids toward opposite spindle poles.
E. Following securin degradation and a decrease in mitotic CDK activity.
Which of the following series is correct?
TLS Online TPP Program

#Question id: 12189

#Unit 2. Cellular Organization

Following statements are regarding to model for reassembly of the nuclear envelope during telophase. 
A. Extensions of the endoplasmic reticulum (ER) associate with each decondensing chromosome and then fuse with one another, forming a double membrane around the chromosome. 
B. Dephosphorylated nuclear pore subcomplexes reassemble into nuclear pores, forming individual mini-nuclei called karyomeres. 
C. The enclosed chromosome further decondenses, and subsequent fusion of the nuclear envelopes of all the karyomeres at each spindle pole forms a single nucleus containing a full set of chromosomes.
D. Phosphorylated nuclear pore subcomplexes reassemble into nuclear pores, forming individual mini-nuclei called karyomeres.
Which of the following is incorrect?
TLS Online TPP Program

#Question id: 12190

#Unit 2. Cellular Organization

CDK activity is modulated by the following proteins:
(a) cyclin, (b) CAK, (c) Wee1,  (d) p21. Following protein act as:

I. Inhibitory kinase
II. CKI Family of proteins
III. Activatory kinase
IV. Regulatory subunit
Which of the following is correct?
TLS Online TPP Program

#Question id: 12191

#Unit 6. System Physiology – Plant

Auxin efflux transport inhibitors is
TLS Online TPP Program

#Question id: 12192

#Unit 6. System Physiology – Plant

ATIs has been identified that inhibits the AUX1 uptake carrier that is
TLS Online TPP Program

#Question id: 12193

#Unit 6. System Physiology – Plant

Naturally occurring auxin transport inhibitors are___