After DNA synthesis (i.e., S-phase) an identical copy of the DNA has been made and this is present in the two chromatids when viewed as the chromosome.

a. true
b. false


Ans: a. true

Biology & Microbiology

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Why is it important to include a placebo in a scientific study to assess the effectiveness of a drug?

A. It's actually unethical to do so-if you have a drug that you know to be effective, it's unethical to withhold that treatment from an ill patient. B. A placebo-treated group will determine if the changes observed in the drug-treated illness group are due to a psychological effect rather than a physiologic/pharmacologic one. C. It isn't scientifically important-a placebo simply helps investigators satisfy the legal requirements of the Food and Drug Administration in their testing process. D. A placebo-treated group will determine if the changes observed in the illness in this non-treated group are due to a physiologic/pharmacologic effect rather than a psychological one.

Biology & Microbiology

Pick a biological situation where a positive feedback loop controls a response. Show how this loop operates to bring about the response

What will be an ideal response?

Biology & Microbiology

The sequence of amino acids in a protein represents its ____

a. primary structure b. secondary structure c. three dimensional shape d. tertiary folding pattern e. biological function

Biology & Microbiology

Species of ________ are known to decompose jet fuel and wall paint.

A. club fungi B. chytrids C. sac fungi D. AM fungi

Biology & Microbiology