Somatic embryos are bipolar structures in that they have a radicle and a plumule,

a) Plumular end sometimes oriented toward the centre of callus or cell mass 

b) Plumular end always sticks out from the cell mass 

c) The radicular end is always oriented toward the centre of callus or cell mass

d) Radicular end is sometimes sticks out from the cell mass 

Which of the following is the well defined bipolar structure of somatic embryos

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#Question id: 14757

#Unit 5. Developmental Biology

Which of the following events are responsible for transition from fertilization to cleavage ?

TLS Online TPP Program

#Question id: 14758

#Unit 5. Developmental Biology

If contractile ring is disrupted during cleavage, which of the following process stop?

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#Question id: 14759

#Unit 5. Developmental Biology

Which of the following mechanical agent creates cleavage furrow during cleavage?

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#Question id: 14760

#Unit 2. Cellular Organization

During the microfilament formation, the nucleation phase is marked by:

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#Question id: 14761

#Unit 2. Cellular Organization

Following graph represent phases of in vitro G-actin polymerization.

Which of the following is correct?

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#Question id: 14762

#Unit 2. Cellular Organization

Following statements are regarding to determination of filament formation by actin concentration.

A. The critical concentration (Cc) is the concentration at which G-actin monomers are in equilibrium with actin filaments.

B. At monomer concentrations below the Cc, no polymerization takes place. 

C. When polymerization is induced at monomer concentrations above the Cc, filaments assemble until steady state is reached and the monomer concentration falls to Cc.

D. At steady state, the concentration of monomeric actin below the critical concentration.

Which of the following statements promotes spontaneous filament assembly?