What is the role of DNA ligase in the elongation of the lagging strand during DNA replication?
A) It synthesizes RNA nucleotides to make a primer.
B) It catalyzes the lengthening of telomeres.
C) It joins Okazaki fragments together.
D) It unwinds the parental double helix.
E) It stabilizes the unwound parental DNA.
Answer: C
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An example of biomagnification is the ability of Desulfovibrio to catalyze production of methyl mercury, which is lipid soluble, thereby increasing the concentration of mercury in the food chain.
Answer the following statement true (T) or false (F)
The theory of ________ postulates that the number of species on an island represents a dynamic equilibrium between the immigration of new species and the extinction of previously established species
Fill in the blank(s) with correct word
Which molecule, when moving across a plasma membrane, would require the most ATP to be used?
A) a water molecule B) a simple sugar, such as glucose C) a dissolved gas, such as carbon dioxide D) an ion moving against a concentration gradient
Which of the following led to the development of the cell theory?
A) scientific laws B) microscopic observations C) educated guesses D) controlled experiments