Science is subdivided into specific areas of study termed disciplines. These divisions are artificial but are helpful to narrow the massive scope of scientific knowledge to a manageable amount. Given what you know about each, which scientific division is likely to present the best answer to a question about how fluid dynamics affect blood pressure in mammals?
A. Bioinformatics - use of technology to study and store biological data
B. Biochemistry - study of chemical reactions needed for life function, usually at the cellular level.
C. Biophysics - study of biological processes through physics
D. Biology - study of life
Answer: C
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The most common syndrome resulting from nondisjunction is:
A. Turner syndrome. B. Klinefelter syndrome. C. emphysema. D. Down syndrome. E. None of the answer options is correct; the most common syndrome is not listed.
A mutant Drosophila is created that has double the number of bicoid genes, each of which is fully expressed. What is the most likely difference expected in this mutant compared to wild type Drosophila embryos?
A. Hunchback levels would be lower in the anterior portion of the embryo. B. Caudal levels would be higher at the anterior portion of the embryo. C. Less of the embryo would have posterior structures. D. The Bicoid concentration gradient would be less at the anterior portion of the embryo.
The feature that most clearly separates eukaryotes from prokaryotes is the presence in eukaryotic cells of
a. ribosomes. b. oxidative phosphorylation. c. DNA molecules. d. a nucleus.
A man has a mutation in a mitochondrial gene encoding a subunit of the ATP synthase complex. The mutation leads to a defective ATP synthase that is not able to synthesize ATP effectively, and this in turn leads to extreme muscle weakness in the affected individual. If this man has children, what is the likelihood that they will inherit this disease from him?
A. 100% B. 50% C. 25% D. 0% E. 75%