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TLS Online TPP Program

#Question id: 12786

How are matter and energy used in ecosystems?

#Unit 10. Ecological Principles
  1. Matter is cycled through ecosystems; energy is not. 
  2. Energy is cycled through ecosystems; matter is not.
  3. Energy can be converted into matter; matter cannot be converted into energy.
  4. Matter can be converted into energy; energy cannot be converted into matter.
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TLS Online TPP Program

#Question id: 3766

#Unit 3. Fundamental Processes

Individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight, and mutations to the DNA in their skin cells are left uncorrected. Why are the mutations not corrected in individuals with this disorder?
TLS Online TPP Program

#Question id: 528

#Unit 1. Molecules and their Interaction Relevant to Biology

Once inside a cell, glucose is rapidly phosphorylated to glucose-6-phosphate. What is the main purpose of this phosphorylation?
TLS Online TPP Program

#Question id: 24471

#Unit 3. Fundamental Processes

Fluorochrome-coupled monoclonal antibodies to the FLAG or myc epitopes can then be used to detect the recombinant protein in the cell. Alexa- 488-labeled antibody –emit……., Alexa-568-labeled antibody emits ……….respectively
TLS Online TPP Program

#Question id: 23839

#Unit 2. Cellular Organization

Which of the following myosin molecule have 2 heads, but does not assemble into filaments?
TLS Online TPP Program

#Question id: 31104

#Unit 2. Cellular Organization

Which of the following toxin enhances nucleation by binding and stabilizing actin dimers and thereby lowering the critical concentration?