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TLS Online TPP Program

#Question id: 2997

Composed of population of cell that at the same stage of their cell cycle

#I Life Science/ Life Sciences Group – I-V

  1. Chemostat      

  2. Turbidostat

  3. Continuous         

  4. Synchronous culture

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TLS Online TPP Program

#Question id: 4362

#SCPH28 | Zoology

How are bacteria able to change their patterns of protein synthesis so quickly in response to environmental changes?
TLS Online TPP Program

#Question id: 15226

#SCPH06 I Botany

DNA from Salmonella species, when digested with the restriction enzyme Xba I, gives around 15 fragments ranging from 25 kb to 680 kb This pattern of fragments, or ‘fingerprint’, is unique to that strain. If the same fingerprint is found from bacteria from other infected people, then it can be assumed that they were all infected from a common source. Thus, by comparing their eating habits, food sources, etc. the source of the infection can be traced to a restaurant, food item. The fingerprints are created and analysed by
TLS Online TPP Program

#Question id: 15818

#SCPH01 Biochemistry

You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.

What is the maximum number of genes that these 20 mutants could represent?
TLS Online TPP Program

#Question id: 15268

#SCPH28 | Zoology

During DNA isolation, phenol / chloroform extraction is performed to remove
TLS Online TPP Program

#Question id: 12938

#SCPH05 I Biotechnology

What is the main advantage of using Yeast Artificial Chromosome based vector over other vectors?
1. It has ability to clone very large fragments of DNA.
2. YAC vectors do not contain origin of replication sites 
3. It has insert  range up to 2000 kb.
4. It help in genome mapping and sequencing projects.