19. Which nucleotide sequence is complementary to the DNA sequence 5'-GACGTT-3'? (A)5'-TCATGG-3' (B)3'-TCATGG-5' (C)3'-CTGCAA-S' (D) 3'-AGTACC-5' (E) 5-TTGCAG-3'

8. Which statement describes a difference between meiosis I and meiosis II? (A)DNA is replicated during meiosis II but not during meiosis I. (B)Homologous chromosomes separate during meiosis I； sister chromatids separate during meiosis II. (C)Meiosis I produces diploid cells； meiosis II produces haploid cells. (D) Chromosomes align along the equatorial plane of the cell in meiosis I but not in meiosis II. (E) Crossing-over occurs during meiosis II but not during meiosis I.

19. Which nucleotide sequence is complementary to the DNA sequence 5'-GACGTT-3'?
(A)5'-TCATGG-3'
(B)3'-TCATGG-5'
(C)3'-CTGCAA-S'
(D) 3'-AGTACC-5'
(E) 5-TTGCAG-3'

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