TLS Online TPP Program

#Question id: 4352


How does extracellular glucose inhibit transcription of the lac operon?

#Unit 3. Fundamental Processes
  1. by strengthening the binding of the repressor to the operator

  2. by weakening the binding of the repressor to the operator

  3. by inhibiting RNA polymerase from opening the strands of DNA to initiate transcription

  4. by reducing the levels of intracellular cAMP

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TLS Online TPP Program

#Question id: 5050

#Unit 5. Developmental Biology

A stem cell capable of producing all the cell types of a lineage(embryonic and extraembryonic) is said to be-

TLS Online TPP Program

#Question id: 5051

#Unit 5. Developmental Biology

fter the 8-cell stage, the mammalian embryo develops an outer layer (which becomes the fetal portion of the placenta), and an inner cell mass that generates all the cells of embryo. The cells of the inner cell mass are thus said to be-

TLS Online TPP Program

#Question id: 5052

#Unit 5. Developmental Biology

cell populations within each germ layer expand and differentiate, resident stem cells are maintained within these developing tissues and function to generate cell types with restricted specificity for the tissue in which they reside. these stem cells are-

TLS Online TPP Program

#Question id: 5053

#Unit 5. Developmental Biology

Local cell signaling is carried out via membrane receptors that bind to proteins in the extracellular matrix (ECM) or directly to receptors from a neighboring cell in a process called as-

TLS Online TPP Program

#Question id: 5054

#Unit 5. Developmental Biology

when one group of cells changing the behavior of an adjacent set of cells, thereby causing them to change their shape, mitotic rate, or cell fate. This kind of interaction at close range between two or more cells or tissues of different histories and properties is called as-

TLS Online TPP Program

#Question id: 5055

#Unit 5. Developmental Biology

There are at least two components to every inductive interaction-