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TLS Online TPP Program

#Question id: 4135

In the “activation” of an amino acid for protein synthesis:

#3. Fundamental Processes

  1. leucine can be attached to tRNAPhe, by the aminoacyl-tRNA synthetase specific for leucine.

  2. methionine is first formylated, then attached to a specific tRNA.

  3. the amino acid is attached to the 5' end of the tRNA through a phosphodiester bond.

  4. there is at least one specific activating enzyme and one specific tRNA for each amino acid.

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TLS Online TPP Program

#Question id: 5022

#11. Evolution and Behavior

Almost all of the major animal body plans seen today appeared in the fossil record over 500 million years ago at the beginning of the
TLS Online TPP Program

#Question id: 10392

#6. System Physiology – Plant

Structural domains in phytochrome are dimeric chromoproteins. The two sub‐units of phytochromes are linked with
TLS Online TPP Program

#Question id: 8776

#9. Diversity of Life Forms

What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdom?
TLS Online TPP Program

#Question id: 5074

#5. Developmental Biology

The "mid-blastula transition" is the point in development when:
TLS Online TPP Program

#Question id: 11970

#7. System Physiology – Animal

Why do the cells of the digestive system secrete proteolytic enzymes, such as pepsin, in their inactive forms?