Which of the following is associated with rough ER?
A) Plasma membrane
B) Ribosomes
C) Chlorophyll
D) DNA
E) Lipid synthesis
B
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A mouse gene was identified and determined to be required for formation of heart muscle. A gene with a similar sequence was identified in the human genome. What experiment could scientists do to determine if the mouse and human genes have similar functions?
A) The scientist could search the human genome for genes that encode proteins that are identical to the protein encoded by the mouse gene. B) The scientist could place the normal human gene into normal mice and see if the resulting mice are viable. C) The scientist could place the normal human gene into mutant mice to see if heart muscle forms in the mouse. D) The scientist could place the mutant mouse gene into humans to see if humans develop without heart muscle.
Most fresh water exists as:
a. ice b. soil water c. aquifer water d. surface water (lakes, rivers) e. atmosphere
Which of the following organelles is bounded by a double membrane?
a. mitochondrion b. chromosome c. centriole d. Golgi body
Theoretically, P. bursaria can obtain zoochlorella either vertically (via the asexual reproduction of its mother cell) or horizontally (by ingesting free-living Chlorella from its habitat)
Consider a P. bursaria cell containing zoochlorellae but whose habitat lacks free-living Chlorella. If this cell subsequently undergoes many generations of asexual reproduction, if all of its daughter cells contain roughly the same number of zoochlorellae as it had originally contained, and if the zoochlorellae are all haploid and identical in appearance, then what is true? The zoochlorellae _____. A) also reproduced asexually, at an increasing rate over time B) also reproduced asexually, at a decreasing rate over time C) also reproduced asexually, at a fairly constant rate over time D) reproduced sexually, undergoing heteromorphic alternation of generations