The classic work of Friedrich Wöhler (1828) that united the fields of biology and chemistry was based on the
A) discovery of yeast ferments.
B) production of urea in the laboratory.
C) discovery of ATP.
D) identification of nucleotide bases.
E) analysis of gene segregation.
Answer: B
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Answer the question using the accompanying figure. Which image represents the position of the Earth during the
vernal (March) equinox?
a. a b. b c. c d. d e. A and C
Some viruses never use DNA to carry out protein synthesis and have only RNA as their genetic material. This would lend evidence to which theory?
A. endosymbiotic theory of eukaryote evolution B. protein-first hypothesis C. simultaneous evolution of RNA and proteins D. RNA-first hypothesis
What are the possible phenotypes of the children if the mother's genotype is IAi for blood type and the father is IBi?
(Use the Punnett square to verify your answer.) a. all AB b. A, B c. A, AB d. A, B, O e. A, B, AB, O
Which drug/s interfere with the action of an HIV enzyme needed for final assembly and maturation of the virus?
A. Integrase inhibitors B. Reverse transcriptase inhibitors C. Fusion inhibitors D. Protease inhibitors E. All of the choices are correct.