Nonprotein catalysts are known as ________
Fill in the blank with correct word.
Answer: ribozymes
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Epsilonproteobacteria are most dominant in hydrothermal vents because they
A) reduce nitrogen. B) oxidize reduced sulfur compounds. C) use oxygen as electron acceptors. D) bind divalent cations.
The first evidence for nucleosome formation came from digesting chromosomal DNA with a nonspecific nuclease. Gel electrophoresis of the DNA after the reaction revealed:
A. a ladder of protected fragments about 1,000 bp apart. B. a ladder of protected fragments about 200 bp apart. C. a large band corresponding to 200 bp. D. random distribution of bands corresponding to different sizes. E. four bands, each composed of a different histone.
A cycle of biological activity that repeats around every 24 hours.
A. Circadian rhythm B. Photosynthesis C. Respiration D. Glycolysis E. Photorespiration
In the laboratory, what is added to media to stabilize the pH within acceptable limits?
A) Buffers B) Proteins C) Enzymes D) Water