After PCR, the amplification control has failed to yield a product. What should you do?
a. Report out Indeterminate
b. Report out Negative because there was no amplification from the sample
c. Check the original DNA or RNA prepara-tion. If it is adequate, repeat the amplifi-cation. If not, re-isolate the nucleic acid.
d. Repeat it using a higher concentration of amplification control in the reaction.
D
Amplification controls typically fail based on nucleic acid concentration or preparation.
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Golden rice is made more beta-carotene rich
with genes from bacteria and
a. corn. b. mice. c. tulips. d. daffodils. e. oranges
Which of the following bacteria is known to cause the formation of peptic ulcers?
a. Helicobacter pylori b. Staphylococcus aureus c. Streptococcus pyogenes d. Escherichia coli e. Micrococcus luteus
Why would gene duplication events, such as those seen in the Hox gene complex, set the stage for adaptive radiation?
A) There are more copies of genes, meaning speciation had occurred by polyploidy. B) The original gene copy is the outgroup, and the new gene copies are the adaptive radiation. C) Without duplicated genes, species would be vulnerable to extinction. D) One copy of a gene can perform the original function, while other copies are available to take on new functions.
A response an animal develops to a stimulus as a result of pleasant experiences occurring each time the stimulus is received is a kind of learning called
A. insight. B. instrumental learning. C. habituation. D. classical conditioning.