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TLS Online TPP Program

#Question id: 9609

Dozens of potato varieties exist, differing from each other in potato-tuber size, skin color, flesh color, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classification scheme is most likely to come from an adherent of the phylocode method of classification?

#XL - S Microbiology
  1. Flesh color, rather than skin color, is a valid trait to use for classification because it is less susceptible to change with the age of the tuber.
  2. Flower color is a better classification criterion, because below-ground tubers can be influenced by minerals in the soil as much as by their genes.
  3. The only biologically valid classification of potato varieties is one that accurately reflects their genetic and evolutionary relatedness.
  4. The most accurate phylogenetic code is that of Linnaeus. Classify potatoes based on Linnaean principles; not according to their color.
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TLS Online TPP Program

#Question id: 444

#XL - S Microbiology

Which of the following is not a factor contributing to the large free energy of hydrolysis of ATP?
TLS Online TPP Program

#Question id: 446

#XL - S Microbiology

Which statement is false about ATP?
TLS Online TPP Program

#Question id: 447

#XL - S Microbiology

In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change (DG'°) of 23.8 kJ/mol.  Under what conditions encountered in a normal cell will the free-energy change (DG) be negative, enabling the reaction to proceed spontaneously to the right?
TLS Online TPP Program

#Question id: 448

#XL - S Microbiology

During glycolysis, glucose 1-phosphate is converted to fructose 6-phosphate in two successive reactions: Glucose 1-phosphate -> glucose 6-phosphate DG'° = –7.1 kJ/mol Glucose 6-phosphate -> fructose 6-phosphate DG'° = +1.7 kJ/mol DG'° for the overall reaction is:
TLS Online TPP Program

#Question id: 449

#XL - S Microbiology

The standard free-energy changes for the reactions below are given. Phosphocreatine -> creatine + Pi DG'° = –43.0 kJ/mol ATP ->  ADP + Pi DG'° = –30.5 kJ/mol What is the overall DG'° for the following reaction? Phosphocreatine + ADP -> creatine + ATP
TLS Online TPP Program

#Question id: 450

#XL - S Microbiology

The DG'° values for the two reactions shown below are given.

Oxaloacetate + acetyl-CoA + H2O -> citrate + CoASH DG'° = –32.2 kJ/mol

Oxaloacetate + acetate    ->   citrate DG'° = –1.9 kJ/mol

What is the DG'° for the hydrolysis of acetyl-CoA?

Acetyl-CoA + H2O -> acetate + CoASH + H+