The PCR technique doubles the amount of DNA in a sample in each cycle. If you started the PCR technique with two fragments of double-stranded DNA, calculate how many double-stranded DNA fragments you would you have after four cycles
A) 8
B) 16
C) 32
D) 64
C
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Each DNA nucleotide is made up of
a. a six-carbon sugar, a phosphate group, and one of twenty amino acids. b. a five-carbon sugar, a nitrogenous base, and one of twenty amino acids. c. a five-carbon sugar, a phosphate group, and one of four nitrogenous bases. d. a six-carbon sugar, a nitrogenous base, and one of four amino acids. e. a five-carbon sugar, a phosphate group, and one of four amino acids.
A patient with Bruton's agammaglobulinemia has decreased immunoglobulin. This disease affects __________.
A) Macrophages B) natural killer cells C) T cytotoxic cells D) B cells
Explain how bryophytes are an intermediate between green algae and terrestrial plants
What will be an ideal response?
Liver and kidney cells filter and destroy many toxins. As a result they contain high numbers of which type of organelle that is responsible for breaking down fatty acids?