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TLS Online TPP Program

#Question id: 1508

Of the following statements explaining how alterations of the ras gene cause cancer, which is true?

#Unit 4. Cell Communication and Cell Signaling

  1. A base substitution in the c-ras gene that replaces a critical glycine with another amino acid.

  2. Infection of the cell by a tumor virus carrying a v-ras gene.

  3. Linkage of the c-ras gene to a viral promoter.

  4. All of the above statements are true.

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TLS Online TPP Program

#Question id: 12783

#Unit 10. Ecological Principles

Which of these ecosystems accounts for the largest amount of Earth's net primary productivity? 
TLS Online TPP Program

#Question id: 12784

#Unit 10. Ecological Principles

Which of the following is true of detrivores?
TLS Online TPP Program

#Question id: 12785

#Unit 10. Ecological Principles

Which of the following members of a marine food chain occupies a similar tropic level to a grasshopper in a terrestrial food chain?
TLS Online TPP Program

#Question id: 12786

#Unit 10. Ecological Principles

How are matter and energy used in ecosystems?
TLS Online TPP Program

#Question id: 12787

#Unit 10. Ecological Principles

A cow's herbivorous diet indicates that it is a(n)
TLS Online TPP Program

#Question id: 12788

#Unit 10. Ecological Principles

To recycle nutrients, the minimum an ecosystem must have is