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TLS Online TPP Program

#Question id: 3869

Which one of the following statements about E. coli RNA polymerase (core enzyme) is false?

#Unit 3. Fundamental Processes

  1. It can start new chains de novo or elongate old ones.

  2. It has no catalytic activity unless the sigma factor is bound.

  3. It uses nucleoside 5'-triphosphates as substrates.

  4. Its activity is blocked by rifampicin.

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TLS Online TPP Program

#Question id: 1684

#Unit 4. Cell Communication and Cell Signaling

What are the molecules mediating signal transduction following antigen binding to cell surface immunoglobulin on a B-cell called?
TLS Online TPP Program

#Question id: 22944

#Unit 5. Developmental Biology

In the floral meristem, the FT-FD complex activates the expression of
TLS Online TPP Program

#Question id: 5100

#Unit 5. Developmental Biology

During frog development, the blastocoel ________.
TLS Online TPP Program

#Question id: 12551

#Unit 10. Ecological Principles

Which of the following examples would most accurately measure the density of the population being studied? 
TLS Online TPP Program

#Question id: 2259

#Unit 2. Cellular Organization

Which of the following is not a characteristic of prokaryotes?