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TLS Online TPP Program

#Question id: 2962

Which of the following experimental observations (some real, some contrived) would not be consistent with our current understanding of cytokinesis?

#SCPH28 | Zoology

  1. Anti-myosin antibodies injected in a dividing cell cause cytokinesis to stop.

  2. When the myosin II gene is mutated, cells undergo nuclear division, but not cytokinesis.

  3. Anti-actin antibodies injected into dividing cells have no effect on cytokinesis.

  4. Actin filaments seen in micrographs are aligned parallel to the cleavage furrow.

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TLS Online TPP Program

#Question id: 18075

#SCPH06 I Botany

At high salt concentrations, the mRNA containing poly(A) tails binds to the complementary oligo(dT) molecules of the affinity column, and so, mRNA will be retained; all other RNA molecules can be washed through the column by further high salt solution. finally, the bound mRNA can be eluted by using
TLS Online TPP Program

#Question id: 4152

#SCPH01 Biochemistry

The pathway for polypeptides exported from E. coli includes the following steps, which occur in what order for correct export?

1.  A chaperone, SecA, binds to the polypeptide.

2.  A chaperone, SecB, binds to the polypeptide.

3.  ATP is hydrolyzed by Sec A.

4.  SecA pushes 20 amino acids of the polypeptide into the translocation complex.
TLS Online TPP Program

#Question id: 20711

#SCPH01 Biochemistry

During the electron transfer process, usable energy is recovered via a series of redox reactions through the formation of 
1. Energy storage compounds 
2. Electrochemical gradients
3. Vacoules
Which of the below combinations are correct?
TLS Online TPP Program

#Question id: 2162

#SCPH28 | Zoology

Uniport transport
TLS Online TPP Program

#Question id: 1120

#SCPH28 | Zoology

A mutation that knocks out the GTPase activity of a G protein would have what effect on a cell?