Macromolecules that are used by all organisms to store hereditary information are called:
A. ribosomal RNA molecules.
B. transfer RNA molecules.
C. messenger RNA molecules.
D. DNA molecules.
E. proteins.
Answer: D
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Facultative anaerobic bacteria
a. do not tolerate oxygen. b. respire in low oxygen. c. are chemosynthetic. d. require oxygen to perform photosynthesis. e. are common in open water samples.
What occurs when a photosynthetic protist is taken up by a heterotrophic protist and evolves into a chloroplast?
a. multicellularity b. primary endosymbiosis c. colonialism d. chloroplasty e. secondary endosymbiosis
The last intermediate produced in the Krebs
cycle before the entry of the next acetyl-CoA is a. pyruvate. b. acetyl-CoA. c. fructose bisphosphate. d. oxaloacetate. e. citrate.
The preferred method for long term storage of bacteria is (freezing/refrigeration/lyophilization)
What will be an ideal response?