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TLS Online TPP Program

#Question id: 5295

A cross is made between an Hfr that is met+ thi+ pur+ and an F-that is met- thi- pur-. Interrupted mating studies show that met+ enters the recipient last, so met+ recombinants are selected on a medium containing supplements that satisfy only the pur and thi requirements.  These recombinants are tested for the presence of the thi+ and pur+ alleles. The following numbers of individuals are found for each genotype:

A) Gene Order

I

Thi Pur  Met

II

Pur  Met  Thi

III

Pur   Thi  Met

B) Distance between Pur and Thi

IV

15.4 map unit

V

1.8 map unit

What is the following correct combination?

#XL - S Microbiology

  1. A- II, B-V        

  2. A-I, B-IV                

  3. A-1, B-V           

  4. A-III, B-V    

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TLS Online TPP Program

#Question id: 19682

#XL - P Chemistry

Which of the following statements concerning methylamine is correct?
TLS Online TPP Program

#Question id: 12790

#XL - R Botany

Which of the following are responsible for the conversion of most organic material into CO  , which can be utilized2 in primary production?
TLS Online TPP Program

#Question id: 4940

#XL - S Microbiology

In their laboratory simulations of the early Earth, Miller and Urey observed the abiotic synthesis of
TLS Online TPP Program

#Question id: 8924

#XL - R Botany

Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?
1. Protostomes invade terrestrial environments.
2. Cambrian explosion occurs.
3. Deuterostomes invade terrestrial environments.
4. Vertebrates become top predators in the seas.
TLS Online TPP Program

#Question id: 3757

#XL - Q Biochemistry

Which of the following characteristics of eukaryotic telomeres cause them to replicate differently than the rest of the chromosome?