According to the Linnaean system of classification, the organism Acetabularia mediterranea is most closely related to
A. Mediterranea crassa.
B. Acetabularia crenulata.
C. Mediterranea crenulata.
D. Crenulata acetabularia.
Ans: B. Acetabularia crenulata.
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Which of the following linkage maps correctly shows the order and distance between the px, sp, and cn genes?
Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a male homozygous for all three mutations. The offspring are as follows:
A) sp——0.21 m.u.——px——30.01 m.u.——cn
B) sp——30.01 m.u.——px——0.21 m.u.——cn
C) sp——0.2 m.u.——px——30 m.u.——cn
D) px——0.2 m.u.——sp——30.2 m.u.——cn
E) px——30.2 m.u.——sp——0.2 m.u.——cn
In a PCR reaction, a few seconds at high temperature disrupts the ____ that hold the two strands of DNA together, so
every molecule of DNA unwinds and becomes single-stranded.
a. covalent bonds b. peptide bonds c. hydrogen bonds d. lipoproteins e. DNA ligases
Write the empirical formula for a carbohydrate. What will be an ideal response?
Which of the following statements about the cerebrum is NOT true?
A. The cerebrum coordinates the activities of the other parts of the brain. B. It is the largest part of the human brain. C. The right hemisphere is associated with analytical reasoning and the left hemisphere is associated with artistic and musical ability. D. The two cerebral hemispheres are connected by the corpus callosum. E. The gray matter is outermost.