TLS Online TPP Program

#Question id: 2260


The term "nuclear envelope" is more correct than the term "nuclear membrane" because

#Section 3: Genetics, Cellular and Molecular Biology
  1. the enclosure has pores which membranes do not

  2. the enclosure is made up of two membranes

  3. the chemical composition is inconsistent with cellular membranes

  4. None of the above. The two terms are perfect synonyms.

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TLS Online TPP Program

#Question id: 14244

#Section 5: Bioprocess Engineering and Process Biotechnology

Ethanol is produced by anaerobic fermentation of glucose by Saccharomyces cerevisiae. For the particular strain of S. cerevisiae employed, the maintenance coefficient is 0.18 kg kg- 1 h- 1, Yxs is 0.11 kg kg-1, YPX is 3.9 kg kg-1 and µmax is 0.4 h-1.  It is decided to investigate the possibility of using Zymomonas mobilis bacteria instead of yeast for making ethanol. Z. mobilis is known to produce ethanol under anaerobic conditions using a different metabolic pathway to that employed by yeast. Typical values of Yxs are lower than for yeast at about 0.06 kg kg-1; on the other hand, the maintenance coefficient is higher at 2.2 kg kg -1 h -1. Ypx for Z. mobilis is 7.7 kg kg-l; µmax is 0.3 h- 1.  From stoichiometry, what is the maximum theoretical yield of ethanol from glucose                 

TLS Online TPP Program

#Question id: 2286

#Section 3: Genetics, Cellular and Molecular Biology

Bacterial flagella propel the cell by using

TLS Online TPP Program

#Question id: 18641

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

Which one of the following is NOT an algorithm for building phylogenetic trees? 

TLS Online TPP Program

#Question id: 4164

#Section 3: Genetics, Cellular and Molecular Biology

Which help cells avoid mis-insertion of amino acids in protein synthesis?

TLS Online TPP Program

#Question id: 18639

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

Which one of the following techniques is used for the evaluation of phylogenetic trees?