TLS Online TPP Program

#Question id: 2228


Proton pumps are used in various ways by members of every domain of organisms: Bacteria, Archaea, and Eukarya. What does this fact most probably mean?

#Unit 2. Cellular Organization
  1. Proton gradients across a membrane were used by cells that were the common ancestor of all three domains of life.

  2. The high concentration of protons in the ancient atmosphere must have necessitated a pump mechanism.

  3. Cells of each domain evolved proton pumps independently when oceans became more acidic.

  4. Proton pumps are necessary to all cell membranes.

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TLS Online TPP Program

#Question id: 12690

#General Aptitude

From four corners of a square sheet of side 4 cm, four pieces,each in the shape of arc of a circle with radius 2 cm, are cut out.The area of the remaining portion is :

TLS Online TPP Program

#Question id: 12691

#General Aptitude

If the area of a rectangle be (x^2 +7x + 10) sq. cm, then one of the possible perimeter of it is

TLS Online TPP Program

#Question id: 12692

#General Aptitude

A kite in the shape of a square with a diagonal 32 cm attached an equilateral triangle of the base 8 cm. Approximately how much paper has been used to make it? (Use √3 = 1.732)

TLS Online TPP Program

#Question id: 12693

#Unit 8. Inheritance Biology

A panel of cell lines was created by human-mouse cell line hybridization. Each line was examined for the presence of  human chromosome and for the gene production. The following result were obtained;
On the basis of these results, which chromosome has the gene  that encodes the enzyme ?

TLS Online TPP Program

#Question id: 12694

#Unit 8. Inheritance Biology

A panel of cell lines was created by human—mouse somatic-cell hybridization. Each line was examined for the presence of human chromosomes and for the production of an enzyme. The following results were obtained: 

On the basis of these results, which chromosome has the gene that encodes the enzyme? 

TLS Online TPP Program

#Question id: 12695

#Unit 8. Inheritance Biology

A panel of cell lines was created by human—mouse somatic-cell hybridization. Each cell line was examined for the presence of human chromosomes and for the production of three enzymes. The following results were obtained: 

On the basis of these results, give the chromosomal locations of the genes encoding enzyme 1, enzyme 2, and enzyme 3.