A bacterium that is pathogenic:
A) is a disease-causing organism.
B) has genes similar to viruses.
C) benefits from living inside humans and produces nutrients for us.
D) is flexible regarding use of metabolic pathways.
Answer: A
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Explain why identical twins are clones
What will be an ideal response?
The peppered moth experiment in England is an example of ________
a. mutations b. disruptive selection c. directional selection d. sexual selection e. stabilizing selection
Does the presence of the double bond in the hydrocarbon tail of oleic acid change the shape of the molecule? a. No, because the double bond strengthens the existing shape. b. No, because there is no double bond in oleic acid. c. Yes, because the double bond results in a bend in the molecule, forming a rightangle
d. Yes, because the double bond results in a circular structure to the molecule.
DNA ligase functions to
A. catalyze the formation of hydrogen bonds between adjacent 5'?P and 3'?OH termini. B. relax supercoiling of DNA. C. add methyl groups to DNA. D. facilitate base pairing between single?stranded molecules of DNA. E. catalyze the formation of covalent bonds between adjacent 5'?P and 3'?OH termini.