Microbes are sometimes used in secondary treatment of wastewater to
A) convert heavy metals into carbon dioxide.
B) remove organic matter.
C) remove large particles.
D) convert heavy metals into carbon dioxide, remove organic matter, and remove large particles.
Answer: B
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An autotroph is likely to convert CO2 into reduced organic carbon in order to produce precursor metabolites.
Answer the following statement true (T) or false (F)
Mitochondria contain their own DNA and replicate on their own. Why is it that they don't suffer the same consequences as our cells in terms of limited division?
A. Because they have high telomerase activity. B. Shortening of the DNA is only a problem with nuclear DNA; shortening of mitochondrial DNA isn't catastrophic. C. Mitochondrial DNA is circular, so it doesn't shorten when it replicates. D. Since mitochondrial DNA only contains a few genes, it can last a lot longer. E. Because they have high telomerase activity and their DNA is circular and so doesn't shorten in replication.
What can RNA do that DNA cannot that makes RNA a good starting point for life? What will be an ideal response?
Which of the following is not a hormone that uses the mechanism of action of peptide hormones?
a. insulin b. oxytocin c. ADH d. ecdysone e. growth hormone