Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 47803
TLS Online TPP Program

#Question id: 1104

Which of the following statements is true of signal molecules?

#SCPH28 | Zoology

  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.

More Questions
TLS Online TPP Program

#Question id: 23250

#SCPH01 Biochemistry

In presence of ATP luciferase-mediated conversion of luciferin into which compound?
TLS Online TPP Program

#Question id: 342

#SCPH28 | Zoology

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by ________.
TLS Online TPP Program

#Question id: 13091

#SCPH05 I Biotechnology

To express a yeast gene in E. coli, your task is to design a strategy to insert the yeast gene into the bacterial plasmid. Below is a map of the area of the yeast genome surrounding the gene in which you are interested.
 
The distance between each tick mark placed on the line above is 100 bases in length
Below are the enzymes you can use, with their specific cut sites shown 5’-XXXXXX-3’ 3’-XXXXXX-5’
 
The plasmid is 5,000 bases long and the two farthest restriction enzyme sites are 200 bases apart. The plasmid has an ampicillin resistance gene somewhere on the plasmid distal from the restriction cut sites.
                              
You do the digestion of the insert and the vector and then ligate the two digestions together. You then transform the ligation into bacteria and select for ampicillin resistance. You get three colonies on your transformation plate. You isolate plasmid from each one and cut each plasmid with the enzyme XbaI. You then run your three digestions on an agarose gel and see the following patterns of bands. Describe what each plasmid actually was that was contained in each of the three colonies.
 
Which colony’s plasmid do you actually want to use for your studies?
TLS Online TPP Program

#Question id: 3549

#SCPH12 I Genetics

When a plant of chromosomal type aa pollinates plant of type AA, what is the chromosome constitution of embryo and endosperm is expected in the resulting seeds
TLS Online TPP Program

#Question id: 1561

#SCPH06 I Botany

The cells and signaling molecules involved in the initial stages of the inflammatory response are ?