Which of the following is in the correct order for one cycle of polymerase chain reaction (PCR)?
A) Denature DNA; add fresh enzyme; anneal primers; add dNTPs; extend primers.
B) Add fresh enzyme; denature DNA; anneal primers; add dNTPs; extend primers.
C) Anneal primers; denature DNA; extend primers.
D) Extend primers; anneal primers; denature DNA.
E) Denature DNA; anneal primers; extend primers.
Answer: E
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A common consequence of nutrient deficiencies in plants is chlorosis, which is ____
a. wilting due to a lack of chlorine in leaves b. death of the growing tips c. premature loss of leaves d. bursting of cells from excess water uptake due to an inability to clear chlorine from them e. yellowing of plant tissues due to a lack of chlorophyll
This hormone binds to a plasma membrane
receptor and has its effect by way of a second messenger. This hormone is
a. aldosterone. b. calcitonin. c. progesterone. d. cortisol. e. more than one of these
Why is only one strand of DNA transcribed into mRNA?
a. Because mRNA is only required in small quantities b. Because transcribing both DNA strands would produce different amino acid sequences c. Because the other strand would produce the same amino acid sequence in reverse order d. Because all genes are located on the same DNA strand, while the other strand acts as protection e. Because the other strand is transcribed directly into amino acids
Analysis of blood to detect specific antigens or antibodies is known as
A) immunology. B) hematology. C) serology. D) cytology. E) histology.