In DNA the purines are

a. thymine and cytosine.
b. adenine and cytosine.
c. adenine and guanine.
d. thymine and adenine.
e. guanine and thymine.


C

Biology & Microbiology

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Based on your knowledge of the polarity of water molecules, the solute molecule depicted here is most likely _____

A) positively charged B) negatively charged C) without charge D) hydrophobic E) nonpolar

Biology & Microbiology

In the second half of the twentieth century, human activities have more than tripled the amount of

nitrogen released from land into the atmosphere or aquatic systems.

Indicate whether the statement is true or false.

Biology & Microbiology

Sarin nerve gas paralyzes muscle by interfering with neuronal transmission by which of the following?

A) serotonin B) GABA C) acetylcholine D) encephalin E) glutamate

Biology & Microbiology

Briefly describe how a fever develops in response to infection

What will be an ideal response?

Biology & Microbiology