TLS Online TPP Program

#Question id: 290


Which of the following is a TRUE statement about ionic bonds in protein structure:

#Section 2: General Biology
  1. Ionic bonds on the external surface of the folded protein are more stable than those buried in the protein interior.

  2. In an ionic bond, a hydrogen atom carrying a partial positive charge on the electronegative atom of one covalent bond interacts with the partial negative charge of an electronegative atom of a second polar covalent bond.

  3. Ionic bonds can only form between acidic and basic polar charged amino acid R groups in a specific pH range.

  4. Ionic bonds only exist in inorganic molecules.

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TLS Online TPP Program

#Question id: 467

#Section 4: Fundamentals of Biological Engineering

The standard potential for electron transfer can be related to the standard free-energy change for redox reactions by using

TLS Online TPP Program

#Question id: 469

#Section 2: General Biology

The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied by a net gain of:

TLS Online TPP Program

#Question id: 532

#Section 4: Fundamentals of Biological Engineering

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 to the right?

TLS Online TPP Program

#Question id: 533

#Section 4: Fundamentals of Biological Engineering

Glucose, labeled with 14C in different carbon atoms, is added to a crude extract of a tissue rich in the enzymes of the pentose phosphate pathway.  The most rapid production of 14CO2 will occur when the glucose is labeled in:

TLS Online TPP Program

#Question id: 535

#Section 4: Fundamentals of Biological Engineering

In some diabetic patients, glucose increases disproportionately and is unresponsive to an insulin challenge; under these conditions, how would oneʹs liver normally respond?

A) phosphorylating glucose for entry into the glycolytic pathway

B) saturating glucokinase with glucose

C) phosphorylating glucose for entry into the glycogen synthesis pathways

TLS Online TPP Program

#Question id: 538

#Section 4: Fundamentals of Biological Engineering

Which of the following statements are correct about cells that form ATP mainly by glycolysis are

A) anaerobic yeasts.

B) lactic acid bacteria.

C) kidney medulla cells.