TLS Online TPP Program

#Question id: 2080


Which of the following factors would tend to increase membrane fluidity?

#Unit 2. Cellular Organization
  1. a greater proportion of unsaturated phospholipids

  2. a greater proportion of saturated phospholipids

  3. a lower temperature

  4. a relatively high protein content in the membrane

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TLS Online TPP Program

#Question id: 7210

#Unit 5. Developmental Biology

Model for limb patterning by opposing gradients of retinoic acid (blue shading) and of FGFs and Wnts (pink shading). According to this graph, Which of the following statements are correct?

TLS Online TPP Program

#Question id: 14778

#Unit 13. Methods in Biology

Two dice are thrown the probability of getting an odd number on the one and a multiple of 3 on the other is

TLS Online TPP Program

#Question id: 13092

#Unit 13. Methods in Biology

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.
                              
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?

TLS Online TPP Program

#Question id: 12727

#Unit 13. Methods in Biology

Name the form of DNA which may be produced with a DNA sequence made up from alternating purine and pyrimidine nucleotides.

TLS Online TPP Program

#Question id: 33905

#Unit 2. Cellular Organization

E. coli DNA in vivo corresponds to an average density of 1 negative superhelical turn/200 bp it means it has