TLS Online TPP Program

#Question id: 4341


Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the promoter for the lac operon to the region between the beta galactosidase (lacZ) gene and the permease (lacY) gene, which of the following results would be most likely?

#SCPH28 | Zoology
  1. The three genes of the lac operon will be expressed normally.

  2. RNA polymerase will no longer transcribe permease.

  3. The operon will still transcribe the lacZ and lacY genes, but the mRNA will not be translated.

  4. Beta galactosidase will not be produced.

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#Question id: 9200

#SCPH28 | Zoology

During the inventory of bacterial genes present in the Sargasso Sea, a deep isolated area in the middle of the Atlantic Ocean, a research team concluded that at least 1,800 bacterial species were present. Based on what you might predict about the habitat structure of such an area, what kind of bacterial diversity would you expect to see in tropical coral reef waters?

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#Question id: 16327

#SCPH28 | Zoology

Which of the following hormones release in response to stress?

TLS Online TPP Program

#Question id: 10160

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

Which of the following statements about the C4 cycle is true ?

a.) C4 plants uses the enzyme phosphoenolpyruvate carboxylase (PEPCase), rather than rubisco

b.) Unlike rubisco, O2 does not compete with HCO3 − in the carboxylation catalyzed by PEPCase

c.)  initial carboxylation catalyzes in bundle sheath cells, four-carbon acids formed and flow across the diffusion barrier to the mesophyll cells

d.) during decarboxylation, releasing CO2 that is refixed by rubisco via the Calvin–Benson cycle

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#Question id: 7302

#SCPH06 I Botany

Match the following level of microRNAs in Arabidopsis (Column II and III) with their Phases (Column I)

   Phases (Column I)

 microRNAs (Column II)

Level of microRNAs (Column III)

A. Juvenile vegetative phase

i. miR156

a. Low

B. Adult vegetative phase

ii. miR172

b. High

C. Reproductive phase

 

 

Which of the following combination is correct?

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#Question id: 3613

#SCPH28 | Zoology

When a single gene influences more than one trait it is called