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TLS Online TPP Program

#Question id: 12534

Which of the following statements is correct about biogeochemical cycling?

#Unit 10. Ecological Principles
  1. The phosphorus cycle involves the recycling of atmospheric phosphorus
  2. The phosphorus cycle is a cycle that involves the weathering of rocks
  3. The carbon cycle is a localized cycle that primarily involves the burning of fossil fuels
  4. The carbon cycle has maintained a constant atmospheric concentration of CO2 for the past million years
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TLS Online TPP Program

#Question id: 27575

#Unit 1. Molecules and their Interaction Relevant to Biology

Which kind of interactions occur between the side chains of oppositely charged residues as well as between the NH3+ and COO− groups at the ends of polypeptide
TLS Online TPP Program

#Question id: 27576

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following law describe the potential energy (V) between two separated charges (in a perfect vacuum)
TLS Online TPP Program

#Question id: 342

#Unit 1. Molecules and their Interaction Relevant to Biology

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by ________.
TLS Online TPP Program

#Question id: 343

#Unit 1. Molecules and their Interaction Relevant to Biology

Assume that acid rain has lowered the pH of a particular lake to pH 5.0. What is the hydroxide ion concentration of this lake?
TLS Online TPP Program

#Question id: 344

#Unit 1. Molecules and their Interaction Relevant to Biology

The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. What is this attraction called?
TLS Online TPP Program

#Question id: 345

#Unit 1. Molecules and their Interaction Relevant to Biology

As the [H3O+] of the solution decreases, the [OH-] ________.