All protists are _____
A) unicellular
B) eukaryotic
C) symbionts
D) monophyletic
E) mixotrophic
Answer: B
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Select the statement that correctly describes the roles of histone and nonhistone proteins found in chromatin?
A) Only histones have a structural role in chromatin. B) Only nonhistone proteins have a structural role in chromatin. C) Histone proteins function primarily in chromosome segregation. D) Both histone and nonhistone proteins have a structural role in chromatin. E) Nonhistone proteins function only in replication and chromosome segregation.
Paraoxonase converts the insecticide ____________________ into a toxic substance called paraoxon. Fill in the blank(s) with the appropriate word(s)
Your aim is to sterilize prosthetic devices like heart valves and artificial joint structures before being used in the patient. Considering where they will be placed and the probable composition of the devices, what would be the best chemical to use?
A. Iodine B. Bleach C. Crystal violet dye D. Quaternary ammonium compounds
Which one of the following statements is TRUE regarding the structure of the atom?
A) The nucleus is composed of equal numbers of positively charged particles and negatively charged particles. B) All electrons are located at the same distance from the nucleus. C) In small elements, such as carbon, electrons have a positive charge; in larger elements, such as barium, electrons have a negative charge. D) Most of the mass of an atom is due to its protons and neutrons. E) Neutrons carry a negative charge.