What occurs during the annealing stage of a PCR reaction?

A. The DNA strands separate
B. The DNA polymerase copies the template DNA
C. The primers bind to complementary sequences of the template DNA
D. The reaction stops


C

Biology & Microbiology

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Which of the following is NOT a fat soluble vitamin?

a. A b. C c. D d. E e. K

Biology & Microbiology

Place the steps of bacterial antigen processing and presentation in the correct order

1. Lysosomal enzymes digest the bacterium into molecular bits. 2. The antigen-MHC complex is displayed on the cell surface. 3. The endocytic vesicle fuses with a lysosome. 4. A bacterium is engulfed by a phagocytic cell.

a. 4-3-1-2 b. 4-3-2-1 c. 3-4-2-1 d. 3-4-2-1 e. 2-4-3-1

Biology & Microbiology

Consider a human somatic cell in the G2 phase of the cell cycle. Which statement is false?

A: The cell will have 92 chromosomes. B: The cell will have 92 chromatids. C: The cell will have 92 DNA molecules in the nucleus. D: The cell will be diploid. E: All are true statements.

Biology & Microbiology

Disease spread in poorer countries of the world is increased by

A) inadequate medical care. B) lack of immunizations and antibiotics. C) malnourishment. D) all of the above.

Biology & Microbiology