During which stage of meiosis does homologue separation occur?
A. prophase I
B. anaphase I
C. telophase I
D. prophase II
E. anaphase II
Answer: B. anaphase I
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Moist heat sterilizes by
A. denaturing proteins. B. causing production of singlet oxygen. C. causing the formation of thymine dimers. D. All of the choices are correct.
The DNA fragments making up a genomic library are often contained in _____
A) bacterial artificial chromosomes (BACs) B) recombinant viral RNA C) restriction sites D) DNA-RNA hybrids E) radioactive eukaryotic cells
The strands in a double helix of DNA are:
A. antiparallel B. complementary C. held together via hydrogen bonds D. wound around each other with 10 base pairs per turn E. antiparallel, complementary, held together via hydrogen bonds and wound around each other with 10 base pairs per turn
DNA fragments can be separated in gel electrophoresis because
A. nitrogenous bases have a net negative charge. B. phosphate groups have a net negative charge. C. nitrogenous bases have a net positive charge. D. phosphate groups have a net positive charge.