The compound magnesium chloride (MgCl2 ) turns into one Mg2+ and two Cl- when placed in water. You can guess that the Mg and Cl atoms are held together normally by a(n) ________ bond
A) ionic B) hydrogen C) electronegative D) covalent
Answer: A
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Eukaryotic chromosomes are composed of a complex of 60% protein and 40% DNA. This complex is referred to as:
A. The histone complex B. Chromatin C. The kinetochore D. Cohesin
New species evolve from pre-existing species by the accumulation of
A. metabolic events. B. genetic mutations. C. proteomes. D. reproductive events. E. developmental events.
Which is not a property that is characteristic of a community?
a. energy and nutrient flow throughout the community b. the types of species present c. the relative abundance of each species d. the interactions among different species e. All of these are properties that are characteristic of a community.
As a result of the lytic cycle, _____.
a) the host cell is not destroyed b) the host cell's DNA is destroyed c) viral ribosomes are produced d) viral DNA is incorporated into host cell DNA e) a prophage is created