What maintains the secondary structure of a protein?
A) Ionic bonds B) Disulfide bonds C) Hydrogen bonds D) Peptide bonds
C
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For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the products is 0.3 kJ/K. The temperature of the reaction is 25 degrees Celsius. What can you conclude about this reaction?
A. It is exergonic B. It is endergonic C. it is a redox reaction D. It is being catalyzed by an enzyme
Diagram and label a cross section of a primary eudicot root. Identify the function of three of the labeled tissues. What will be an ideal response?
The subatomic particles that are found in the nucleus of an atom are the
a. protons and electrons. b. neutrons and protons. c. electrons only. d. protons only. e. electrons and neutrons.
A research team began a study of a cultured cell line. Their preliminary observations showed them that the cell line did not exhibit either density-dependent inhibition or anchorage dependence. What could they conclude right away?
A) The cells are unable to form spindle microtubules. B) They have altered the series of cell cycle phases. C) The cells show characteristics of tumors. D) They were originally derived from an elderly organism.