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TLS Online TPP Program

#Question id: 1117

At puberty, an adolescent female body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogen and other steroid hormones. How can one hormone, such as estrogen, mediate so many effects?

#Unit 4. Cell Communication and Cell Signaling

  1. Estrogen is produced in very large concentration by nearly every tissue of the body.

  2. Each cell responds in the same way when steroids bind to the cell surface.

  3. Estrogen is kept away from the surface of any cells, not able to bind it at the surface.

  4. Estrogen binds to specific receptors inside many kinds of cells, each with different responses.

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TLS Online TPP Program

#Question id: 4151

#Unit 3. Fundamental Processes

The signal sequences that direct proteins to the nucleus are:
TLS Online TPP Program

#Question id: 196

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct about S-adenosylmethionine (SAM) is formed from the amino acid methionine so that
A) methyl groups can be formed.
B) it can react with nucleophilic acceptors.
C) it can donate methyl groups in many biosynthetic reactions.
TLS Online TPP Program

#Question id: 15595

#Unit 8. Inheritance Biology

How might the function of extracellular endonucleases help protect the bacterium from infection by viruses?
TLS Online TPP Program

#Question id: 844

#Unit 1. Molecules and their Interaction Relevant to Biology

It is a given set of conditions that are required  for the maintenance of the active set of cellular proteins
TLS Online TPP Program

#Question id: 11812

#Unit 6. System Physiology – Plant

The  nitrogens  at the 3, 7, and 9 positions of the adenine ring of cytokinins can be conjugated to glucose residues, Alanine can also be conjugated to the nitrogen at the 9 positon, forming