As plants absorb water from the soil, they deplete the soil of water near the surface of the roots, This depletion due to

TLS Online TPP Program

#Question id: 412

#Unit 1. Molecules and their Interaction Relevant to Biology

All of the following contribute to the large, negative, free-energy change upon hydrolysis of “high-energy” compounds except:

TLS Online TPP Program

#Question id: 16131

#Unit 13. Methods in Biology

You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS.              

 How many units of ß-galactiosidase would you expect to be expressed from deletion 4 in a gln2– mutant?

TLS Online TPP Program

#Question id: 679

#Unit 1. Molecules and their Interaction Relevant to Biology

b sandwich forms when

TLS Online TPP Program

#Question id: 34139

#Unit 7. System Physiology – Animal

I. Oxytocin and vasopressin are typical neural hormones , that is, hormones secreted into the circulation by nerve cells.

II. Vasopressin and oxytocin each have a characteristic neurophysin associated with them in the granules in the neurons.

III. The precursor for AVP, prepropressophysin , contains a 19-amino-acid residue leader sequence followed by AVP, neurophysin II, and a glycopeptide. 

IV. Prepro-oxyphysin, the precursor for oxytocin, is a similar but smaller molecule that lacks the glycopeptide.

TLS Online TPP Program

#Question id: 4318

#Unit 3. Fundamental Processes

Which of the following statements correctly describes a characteristic of tumor-suppressor gene?