TLS Online TPP Program

#Question id: 58


A covalent chemical bond is one in which ________.

#SCPH01 Biochemistry
  1. electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged

  2. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms

  3. outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals

  4. outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom

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TLS Online TPP Program

#Question id: 15536

#SCPH01 Biochemistry

Which of the following is incorrect regarding the progressive alignment method?

TLS Online TPP Program

#Question id: 3537

#SCPH28 | Zoology

What is the probability of two offspring in which one dominant phenotype and one recessive phenotype from the mating Aa × Aa?

TLS Online TPP Program

#Question id: 566

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

The role of the metal ion (Mg2+) in catalysis by enolase is to

TLS Online TPP Program

#Question id: 1289

#SCPH28 | Zoology

Polymerization of collagen into large collagen fibers occurs:

TLS Online TPP Program

#Question id: 13093

#SCPH28 | Zoology

You are studying a specific gene in yeast, and you want to express that 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 transform your ligation planned in which two restriction enzymes would you use to design a way to get the insert into the vector if you had to use two enzymes simultaneously, into bacteria and plate the bacteria on Petri plates containing ampicillin. (You actually transform six different ligation mixtures, which are described below, into six different populations of cells, and plate each transformation onto a different plate, because you want to do all of the correct controls.) The next day you come in to lab to look at how many colonies of bacteria are on each plate. You are really excited, because the number of colonies you see on each plate tells you that the entire procedure worked! Which of the three following patterns of number of colonies did you see in order to conclude that you had a successful transformation?
In this table, DV = digested vector. DYG = digested yeast genome.