TLS Online TPP Program

#Question id: 23584


Which of the following statements is true concerning sticky ends?

#Unit 13. Methods in Biology
  1. They are fragments with single strand extensions at only the 5ʹ end of a restriction endonuclease.
  2. They can transiently base pair to complementary sticky ends on vector DNA.
  3. They can covalently join to the vector in a reaction catalysed by DNA gyrase.
  4. All of the above

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TLS Online TPP Program

#Question id: 11721

#Unit 6. System Physiology – Plant

The induction of α-amylase synthesis in barley aleurone layers by gibberellin, given some statements about after the induction of GA into the aleurone layer, and allows some transcriptional gene function inside the nucleus such as;

a) GA-MYB is a negative regulator of α-amylase transcription

b) The sequence of the gibberellic acid response element (GARE) in the α-amylase gene promoter is similar to the DNA sequence to which MYB proteins bind.

c) Synthesis of GA-MYB mRNA begins to increase as early as 1 h after gibberellin treatment, preceding the increase in a-amylase mRNA by several  hours

d) A mutation in the GARE that prevents MYB binding also prevents  α-amylase expression.

e) GA-MYB can therefore be defined as a primary or early response gene, while the α-amylase gene is a secondary or late response gene

f) The secretory pathway requires GA stimulation of the calcium-calmodulin– independent pathway.

Which of the following statements is incorrect about this transcriptional gene?

TLS Online TPP Program

#Question id: 27513

#Unit 2. Cellular Organization

Which of the following chemical reagent is used to measure the effect of nicking the DNA

TLS Online TPP Program

#Question id: 705

#Unit 1. Molecules and their Interaction Relevant to Biology

Proteins are classified within families or superfamilies based on similarities in:

TLS Online TPP Program

#Question id: 21259

#Unit 12. Applied Biology

Production of l-Threonine amino acid used for feeding pigs and poultry, Starting from l-aspartate, the pathway involves five steps catalyzed by five enzymes sequence of using enzyme is that;

TLS Online TPP Program

#Question id: 23088

#Unit 12. Applied Biology

Which phytoremediation technique uses plant roots to take up contaminated groundwater or surface water?