Barr bodies are associated with ________.
A. signal transduction
B. proto-oncogenes
C. frameshift mutations
D. X chromosome inactivation
Answer: D
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A mutation in a collagen gene is likely to affect the phenotype because
A) it is extremely rare. B) during meiosis, the chromosome that bears the mutation is more likely to enter a gamete than the chromosome that carries the wild type allele. C) collagen has a very precise three-dimensional structure, so nearly any disruption alters the overall conformation. D) people who use cosmetics with collagen silence collagen genes.
Four of the following are true about the amoebozoans. Which one is the exception?
a. They are shape shifters. b. They include the amoebas. c. They are the closest known relatives of animals. d. They include species that are able to form pseudopods. e. They include the slime molds.
The two major divisions of the vertebrate nervous system are the ____
a. autonomic and peripheral systems b. sympathetic and parasympathetic systems c. cranial and spinal nerves d. central and peripheral nervous systems e. brain and spinal cord
The molar mass of glucose () is 180 g/mol. Which of the following procedures should you carry out to make a 0.5 M solution of glucose? The molar mass of glucose () is 180 g/mol.
a) Dissolve 0.5 g of glucose in 1 L of water. b) Dissolve 180 g of glucose in 0.5 L of water. c) Dissolve 0.5 g of glucose in a small volume of water, and then add more water until the total volume of solution is 1 L. d) Dissolve 90 g of glucose in a small volume of water, and then add more water until the total volume of the solution is 1 L. e) Dissolve 180 g of glucose in a small volume of water, and then add more water until the total volume of the solution is 1 L.