Carriers of the sickle-cell gene
A) are often found in high concentrations in U.S. cities.
B) are more susceptible to contracting malaria.
C) have a survival advantage in areas where malaria is common.
D) are more likely to die from a malaria infection.
E) experience painful changes in nerve cell shape.
Answer: C
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Members of the genus Lactobacillus
A. are strict aerobes. B. grow optimally under slightly alkaline conditions. C. produce large amounts of H2 as a byproduct of metabolism when growing on glucose. D. are normal flora of the human body in mouth, intestinal tract, and vagina.
If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T?
A. Missense B. Deletion C. Insertion D. Nonsense E. Silent
What process in plants does an ncRNA called COOLAIR regulate?
A. flowering only after being exposed to cold temperatures B. seed development C. time of flowering D. development of stomata
The following are steps in using SSU rRNA molecules to develop phylogenetic trees. Place these steps in the correct order.1. Isolate DNA from cells of each organism being tested.2. Amplify the DNA of the SSU rRNA genes of each organism using polymerase chain reaction. 3. Determine the nucleotide sequence of the SSU rRNA genes of each organism.4. Align nucleotide sequences to compare.5. Count the number of nucleotide differences between each pair of sequences and calculate the evolutionary distance.6. Input data into computer and use appropriate software to construct a phylogenetic tree.
Fill in the blank(s) with the appropriate word(s).