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TLS Online TPP Program

#Question id: 2423

What is the function of thymosin beta-4?

#Unit 2. Cellular Organization

  1. Thymosin beta-4 is a F-actin sequestering protein that functions to maintain a relatively high F-actin concentration in cells.

  2. Thymosin beta-4 is a G-actin degrading protein that functions to maintain a relatively low G-actin concentration in cells.

  3. Thymosin beta-4 is a G-actin sequestering protein that functions to maintain a relatively high G-actin concentration in cells.

  4. Thymosin beta-4 is a G-actin sequestering protein that functions to maintain a relatively high G-actin concentration in cells.

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TLS Online TPP Program

#Question id: 32715

#Unit 1. Molecules and their Interaction Relevant to Biology

Which model correctly represents the graph


 
TLS Online TPP Program

#Question id: 32716

#Unit 1. Molecules and their Interaction Relevant to Biology

The given relationship is known as
TLS Online TPP Program

#Question id: 32717

#Unit 1. Molecules and their Interaction Relevant to Biology

The enzyme urease enhances the rate of urea hydrolysis at pH 8.0 and 20oC by a factor of 1014. If a given quantity of urease can completely hydrolyze a given quantity of urea in 5.0 min at 20oC and pH 8.0, how long would it take for this amount of urea to be hydrolyzed under the same conditions in the absence of urease?
TLS Online TPP Program

#Question id: 32718

#Unit 1. Molecules and their Interaction Relevant to Biology

When enzyme solutions are heated, there is a progressive loss of catalytic activity over time due to denaturation of the enzyme. A solution of the enzyme hexokinase incubated at 45oC lost 50% of its activity in 12 min, but when incubated at 45oC in the presence of a very large concentration of one of its substrates, it lost only 3% of its activity in 12 min. What is correct explanation
TLS Online TPP Program

#Question id: 32919

#Unit 2. Cellular Organization

Which control system triggers the early mitotic events that lead to chromosome alignment on the mitotic spindle in metaphase?
TLS Online TPP Program

#Question id: 32920

#Unit 2. Cellular Organization

If extracellular conditions become favorable or signals to grow and divide are introduced, cells in G0 progress through a commitment point in: