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TLS Online TPP Program

#Question id: 9052

Which of the following causes seasons on Earth?

#SCPH28 | Zoology
  1. the variation in proximity of the Earth to the sun at different times of the year
  2. the constant tilt of the Earth, combined with its orbit around the sun
  3. the distance between the Earth and the sun in winter versus in the summer
  4. the variation or wobble of Earth's tilt during the year
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TLS Online TPP Program

#Question id: 15636

#SCPH01 Biochemistry

While analysing motif sequences, what is the major disadvantageous feature of PROSITE?
TLS Online TPP Program

#Question id: 15636

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

While analysing motif sequences, what is the major disadvantageous feature of PROSITE?
TLS Online TPP Program

#Question id: 15636

#SCPH05 I Biotechnology

While analysing motif sequences, what is the major disadvantageous feature of PROSITE?
TLS Online TPP Program

#Question id: 15636

#SCPH05 I Biotechnology

While analysing motif sequences, what is the major disadvantageous feature of PROSITE?
TLS Online TPP Program

#Question id: 15637

#SCPH01 Biochemistry

You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.
     
Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.
TLS Online TPP Program

#Question id: 15637

#SCPH06 I Botany

You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.
     
Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.