Which is a mechanism by which chromosomal rearrangements produce proteins with altered amino acid sequence?

A) Chromosome sets from two different species are combined in one individual.
B) Translocations may fuse two different open reading frames.
C) Deletions may remove regulatory regions of genes.
D) Inversions may move a gene from euchromatin to heterochromatin.


B) Translocations may fuse two different open reading frames.

Biology & Microbiology

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The short, numerous appendages used by some bacterial cells for adhering to surfaces are called ________.

A. flagella B. pili C. fimbriae D. cilia E. periplasmic flagella (axial filaments)

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Meiosis functions in _____

a. asexual reproduction of single-celled eukaryotes b. growth and tissue repair in multicelled species c. sexual reproduction d. asexual reproduction of single-celled eukaryotes and growth and tissue repair in multicelled species

Biology & Microbiology

Which of the following events is unique to prophase I of meiosis?

a. Chromosome condensation. b. Nuclear membrane breakdown, c. Pairing of homologous chromosomes. d. Assembly of a spindle apparatus.

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What is the name of a bead-like globular protein that can contract?

a. sarcomere b. filament c. myofibril d. actin e. myosin

Biology & Microbiology