TLS Online TPP Program

#Question id: 2089


What type of single-pass membrane protein would contain a hydrophobic membrane spanning alpha-helix?

#Section 3: Genetics, Cellular and Molecular Biology
  1. transmembrane protein

  2. integral membrane protein

  3. peripheral protein

  4. transmembrane protein and integral membrane protein

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TLS Online TPP Program

#Question id: 13032

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

In SDS-PAGE, protein sample is first treated with detergent sodium dodecyl sulfate (SDS), in order to

TLS Online TPP Program

#Question id: 11806

#Section 6: Plant, Animal and Microbial Biotechnology

sap is translocated from areas of supply, called sources, to areas of metabolism or storage, called sinks. Which of the following statements about source and sink are TRUE?

a.) Sinks include any nonphotosynthetic organs of the plant and organs that do not produce enough photosynthetic products to support their own growth or storage needs

b.) Sources include exporting organs that are capable of producing photosynthate in excess of their own needs

c.) During the growing season of the first year, storage root is a sink, when it accumulates sugars received from the source leaves. During the second growing season the same root becomes a source

d.) Roots, tubers, developing fruits, and immature leaves, which must import carbohydrate for normal development, are all examples of sources tissues

Find the correct combination of the source and sink pattern of translocation.

TLS Online TPP Program

#Question id: 396

#Section 4: Fundamentals of Biological Engineering

Identical heat lamps are arranged to shine on two identical containers, one containing water and one methanol (wood alcohol), so that each liquid absorbs the same amount of energy minute by minute. The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. Which of the following graphs correctly describes what will happen to the temperature of the water and the methanol?

TLS Online TPP Program

#Question id: 16010

#Section 6: Plant, Animal and Microbial Biotechnology

What is the concentration of CO2 required for culturing animal cells?

TLS Online TPP Program

#Question id: 5243

#Section 3: Genetics, Cellular and Molecular Biology

Auxotroph culture (His- and Lac-) culture of E. coli was mutagenised. On what media would one spread the mutagenised cells to select prototroph for both His+  and Lac+ cells?