Which of the following cell structures is associated with cellular respiration?
a. Golgi apparatus
b. lysomes
c. mitochondria
d. vacuoles
Answer: c. mitochondria
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If cells of an individual contain the same set of genes, how do these cells become different from each other during development?
A) Different cell type-specific regulatory elements in DNA are created during development. B) Different cell type-specific regulatory elements in DNA are selectively lost during development. C) Differences in extracellular signals received by each cell lead to differences in the types of regulatory proteins present in each cell. D) Differences develop in promoter sequences that lead to different signals being produced by each type of cell.
What do biologists use in order to identify
clones that contain the DNA fragment of interest?
a. probes b. plasmids c. templates d. primers e. ligases
Which of the following is an energy-requiring mode of transport that brings substances into a cell?
A) Osmosis B) Simple diffusion C) Active transport D) Facilitated diffusion
A bacterium possessing a tuft of flagella at one end of its cell would be called what kind of bacterium?
A) amphitrichous B) lophotrichous C) monotrichous D) peritrichous