Membrane-like structures form when proteins or lipids are mixed with water. They serve as a model for __________, which may have preceded cells.

Fill in the blank(s) with the appropriate word(s).


protocells

Biology & Microbiology

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A riboswitch mechanism is known to regulate the transcription of genes involved in:

A. lactose metabolism. B. vitamin B1 synthesis. C. tryptophan biosynthesis. D. arabinose metabolism.

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A species that contains two copies of each chromosome is called _______

A. a genetic mutation B. a morph C. haploid D. diploid E. alleles

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How is the aging process linked to telomeres?

Biology & Microbiology

An organism cultured from a single cell of another organism that is genetically identical to the other organism is called:

a) a dedifferentiated organism. b) a stem cell. c) a clone. d) the F1 generation. e) an embryo.

Biology & Microbiology