What happened when researchers added BPDE, a component of tobacco smoke, to human lung cells in a laboratory experiment?

A) The cells behaved normally.
B) The cells shrank in size.
C) The cells developed mutations in their p53 genes.
D) The cells required less energy to grow.


C

Biology & Microbiology

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Unlike plant cells, animal cells move during development. Which of the following terms describes the reorganization of undifferentiated cells that results in the formation of an embryonic structure with multiple layers?

A. blastulation B. gastrulation C. organogenesis D. cleavage

Biology & Microbiology

Growth that results in an increase in stem or root length occurs in which specific area of the plant?

a. lateral meristem b. apical meristem c. vascular cambium d. cork cambium e. periderm

Biology & Microbiology

Which of the following is the thinnest?

A) An intermediate filament B) A microfilament C) A flagellum D) A microtubule

Biology & Microbiology

A holoenzyme is composed of an apoenzyme one or more (cofactors/inhibitors/substrates).

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

Biology & Microbiology