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TLS Online TPP Program

#Question id: 4358

Which of the following mechanisms is used to coordinate the expression of multiple, related genes in eukaryotic cells?

#Part-A Aptitude & General Biotechnology

  1. Environmental signals enter the cell and bind directly to promoters.

  2. A given gene may have multiple enhancers, but each enhancer is generally associated with only that gene and no other.

  3. The genes are organized into a large operon, allowing them to be coordinately controlled as a single unit.

  4. A single repressor is able to turn off several related genes.

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TLS Online TPP Program

#Question id: 18723

#Part-A Aptitude & General Biotechnology

Which of the following will have more efficient ligation?
TLS Online TPP Program

#Question id: 11291

#Part-B Specialized Branches in Biotechnology

A small lake has three trophic levels- phytoplankton (autotrophs), Zooplankton (herbivore) and planktivorous fish (primary carnivore). In this lake, addition of nutrients is allowed to study the 'bottom up' effects". What is the expected biomass of phytoplankton and zooplankton tropic levels?
TLS Online TPP Program

#Question id: 15393

#Part-B Specialized Branches in Biotechnology

First inducers (in early gastrula stages) of the lens may be:
TLS Online TPP Program

#Question id: 12497

#Part-A Aptitude & General Biotechnology

In this pedigree A and B represent alleles at a marker locus closely linked to the disease locus. Affected individuals are shown as shaded. The disease status in III 1 is unknown. Which of the following is correct?
TLS Online TPP Program

#Question id: 12490

#Part-B Specialized Branches in Biotechnology

Tay-Sachs disease shows autosomal recessive inheritance. Parents of a newly diagnosed affected child are referred for genetic counselling. It would be correct to tell them that: