Why is DNA polymerase from Thermus aquaticus ideal for PCR?
a. It can synthesize DNA 5' to 3' and 3' to 5'.
b. It does not require primers.
c. It can withstand the high temperatures associated with PCR.
d. It does not require energy to polymerize DNA.
Ans: c. It can withstand the high temperatures associated with PCR.
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Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids. How many different types of amino acids are used to construct proteins?
A. 2 B. 20 C. 146 D. 200
How does osmosis differ from diffusion?
What will be an ideal response?
Choose the best cause and effect sequence for the process of speciation by natural selection.
A. Variation --> Selection --> Reproductive Isolation --> Mutation --> Speciation B. Mutation --> Variation --> Selection --> Reproductive Isolation --> Speciation C. Speciation --> Reproductive Isolation --> Selection --> Mutation --> Variation D. Variation --> Reproductive Isolation --> Speciation --> Mutation --> Selection E. Selection --> Speciation --> Reproductive Isolation --> Variation --> Mutation Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about natural selection and speciation? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
When salt dissolves in water, the water molecules form ____ around the Na+ and Cl- ions
a. covalent bonds b. hydration layers c. nonpolar interactions d. membranes e. ionic bonds