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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: 18678

#SCPH01 Biochemistry

which of the following technique can be analysed of PCR products from HIV-I allowed the identification of between 200 000 and 500 000 viral particles per cubic centimetre of serum.
TLS Online TPP Program

#Question id: 2293

#SCPH01 Biochemistry

Hooke, Lamark, and Dutrochet are all credited with developing the
TLS Online TPP Program

#Question id: 757

#SCPH05 I Biotechnology

_______________ a bacterial enzyme, uses the energy of ATP hydrolysis to introduce negative supercoiling into DNA hence removing positive supercoiling generated during replication.
TLS Online TPP Program

#Question id: 17815

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

You have two distantly related proteins. Which of the following sets is the best for comparing them?
TLS Online TPP Program

#Question id: 2679

#SCPH05 I Biotechnology

When the same region, or locus, of a chromosome has two (or more) slightly different DNA sequences in different chromosomes or individuals of the same species, these are described as