A 67- year old patient with severe sepsis undergoes a full infectious work-up upon admittance to the intensive care unit. Cultures of urine, blood, sputum and cerebral spinal fluid are obtained. The cultures do not yield a specific organism, so further analysis of the sample is done to determine the characteristics of the microorganism. The metabolic processes are analyzed in the lab The organism is found to grow throughout the entire tube of broth media. Which of the following terms best describes the oxygen requirement of this organism.
a) obligate aerobe
b) microaerophile
c) facultative anaerobe
d) obligate anaerobe
Answer: c) facultative anaerobe
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The beating flagellae of ____ maintain a constant flow of water through sponges
a. amoeboid cells b. choanocytes c. sperm d. porocytes e. pinacoderm
The molecule that can carry foreign DNA into host cells is a(n) ____
a. cloning vector b. transcriptase c. DNA ligase d. endonuclease e. DNA polymerase
How must spindle microtubules attach to chromosomes during prometaphase of meiosis I?
a. Microtubules attach at the centrosomes. b. Microtubules attach to the chiasma. c. Spindle microtubules from one pole attach to one kinetochore, and spindle microtubules from the other pole attach to the other kinetochore in a pair of sister chromatids, just like in mitosis. d. Spindle microtubules from one pole must attach to both kinetochores in a pair of sister chromatids. e. Microtubules attach using their minus (slow assembling) ends.
At what levels can eukaryotic gene expression be regulated? Which level is the most important for most genes?
What will be an ideal response?