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TLS Online TPP Program

#Question id: 1104

Which of the following statements is true of signal molecules?

#SCPH01 Biochemistry

  1. When signal molecules first bind to receptor tyrosine kinases, the receptors phosphorylate a number of nearby molecules.

  2. In response to some G protein-mediated signals, a special type of lipid molecule associated with the plasma membrane is cleaved to form IP3 and calcium.

  3. In most cases, signal molecules interact with the cell at the plasma membrane, enter the cell, and eventually enter the nucleus.

  4. Protein kinase A activation is one possible result of signal molecules binding to G protein coupled receptors.

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TLS Online TPP Program

#Question id: 4575

#SCPH06 I Botany

Monkeys of South and Central America have prehensile tails, meaning that their tails can be used to grasp objects. The tails of African and Asian monkeys are not prehensile. Which discipline is most likely to provide an evolutionary explanation for how this difference in tails came about?
TLS Online TPP Program

#Question id: 779

#SCPH06 I Botany

Which is TRUE of the following statements?
TLS Online TPP Program

#Question id: 5438

#SCPH06 I Botany

Which of the following statement is incorrect?
TLS Online TPP Program

#Question id: 4570

#I Life Science/ Life Sciences Group – I-V

Which pair would probably have agreed with the process that is depicted by this tree?
TLS Online TPP Program

#Question id: 3687

#SCPH28 | Zoology

As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?