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TLS Online TPP Program

#Question id: 4717

 If Darwin had been aware of genes and their typical mode of transmission to subsequent generations, with which statement would he most likely have been in agreement?

#Unit 11. Evolution and Behavior

  1. If natural selection can change gene frequency in a population over generations, given enough time and genetic diversity, then natural selection can cause sufficient genetic change to produce new species from old ones.

  2. If an organism's somatic cell genes change during its lifetime, making it more fit, then it will be able to pass these genes on to its offspring.

  3. If an organism acquires new genes by engulfing, or being infected by, another organism, then a new genetic species will result.

  4. A single mutation in a single gene in a single gamete, if inherited by future generations, will produce a new species.

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TLS Online TPP Program

#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?
TLS Online TPP Program

#Question id: 14759

#Unit 5. Developmental Biology

Which of the following mechanical agent creates cleavage furrow during cleavage?
TLS Online TPP Program

#Question id: 14760

#Unit 2. Cellular Organization

During the microfilament formation, the nucleation phase is marked by:
TLS Online TPP Program

#Question id: 14761

#Unit 2. Cellular Organization

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



Which of the following is correct?
TLS Online TPP Program

#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?