Many of the mechanisms that cells use for maintenance and reproduction were first studied at the molecular levelin bacteria. Which bacterial species had a central role in advancing the field of molecular biology?
(a) E. coli
(b) D. melanogaster
(c) S. pombe
(d) C. elegans
(a)
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Large structures (e.g., ribosomes) form spontaneously from their macromolecular components by a process known as ________.
What will be an ideal response?
In a line graph, the value of the independent variable is:
a. represented on the y-axis. b. represented as bars extending from the y-axis. c. represented as long lines extending from the right side of the graph. d. represented on the x-axis. e. represented as "slices in a pie."
After proton pumps in mitochondria have depleted electrons of their energy during ATP production,
a. the electrons carried as part of hydrogen atoms are used in the formation of water b. the electrons carried as part of hydrogen atoms are used in the formation of ethyl alcohol c. the electrons build up inside the mitochondria and diffuse back to a thylakoid d. none of the above
Tissues are grouped together in functional units called:
A) organs. B) cells. C) organisms. D) organelles.