Some prokaryotes can live by utilizing entirely inorganic materials. Which of the following inorganic molecules would you predict to be the predominant building block for fats, sugars, and proteins?
(a) O2
(b) N2
(c) CO2
(d) H2
(c)
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snoRNPs are found in the nucleolus. Two functions of these complexes include:
A. rRNA processing. B. tRNA processing. C. adding methyl groups to rRNA. D. adding methyl groups to tRNA. E. transcription of 5S rRNA.
The trace amounts of micronutrients needed by microorganisms are usually supplied as inadvertent contaminants in water and regular media components.
Answer the following statement true (T) or false (F)
In transmission electron microscopy, spreading a specimen out in a thin film with uranyl acetate, which does not penetrate the specimen, is called
A. shadow staining. B. freeze-etching. C. simple staining. D. negative staining.
Animals with a menstrual cycle do NOT
a. have an estrous cycle. b. develop endometriosis. c. display periods of sexual interest. d. produce estrogen. e. undergo menopause.