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TLS Online TPP Program

#Question id: 10794

Which one of the following characteristics of about lignin is incorrect?

#SCPH05 I Biotechnology
  1.  Most abundant organic substance in plants and a highly branched polymer of phenylpropanoid groups
  2. lignins are involved in plant–animal interactions, helping to attract animals to flowers and fruit by providing visual and olfactory signals
  3. lignin has significant protective functions in plants, Its physical toughness deters feeding by animals, and its chemical durability makes it relatively indigestible to herbivores

  4. Lignin is generally formed from three different phenylpropanoid alcohols: coniferyl, coumaryl, and sinapyl, alcohols which are synthesized from phenylalanine

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TLS Online TPP Program

#Question id: 15182

#SCPH28 | Zoology

Which of the following types of effect are responsible for lowering the efficiency of electrophoresis?
TLS Online TPP Program

#Question id: 14123

#SCPH05 I Biotechnology

Which of the following statement is true about CATH? 
TLS Online TPP Program

#Question id: 18887

#SCPH01 Biochemistry

Drumstick appearance in the microscopy is the distinguishing characteristics of:
TLS Online TPP Program

#Question id: 3632

#SCPH01 Biochemistry

geneticist is working with a new bacteriophage called phage Y3 that infects E. coli. He has isolated eight mutant phages that fail to produce plaques when grown on E. coli strain K. To determine whether these mutations occur at the same functional gene, he simultaneously infects E. coli K cells with paired combinations of the mutants and looks to see whether plaques are formed. He obtains the following results. (A plussign means that plaques were formed on E. coli K; a minussign means that no plaques were formed on E. coli K.)

How many cistron belong to these mutation?
TLS Online TPP Program

#Question id: 16136

#SCPH06 I Botany

You obtain 6 BACs (of known order, as shown below) and 7 STSs (of unknown order) that derive from a region of mouse chromosome 16 whose genomic sequence has not yet been finished.   
 
By PCR (using 20-bp primers at either end of each STS), you test each of the 6 BACs for the presence (+) or absence (-) of each of the 7 STSs. You obtain the following results:
 
Is there a second STS at which you would like to sequence PCR products obtained using BACs as templates? If so, which BACs would you test in this way, and what sequencing results might you predict for each of the BACs tested?