You are travelling and order a salad and bottled water. You later are feeling ill. What is your best guess?
A. Enterohemorrhagic E. coli
B. Vibrio vulnificus
C. Enterotoxigenic E. coli
D. Clostridium botulinum
Ans: C. Enterotoxigenic E. coli
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Rickettsias are not ________.
A. the cause of Rocky Mountain Spotted Fever B. obligate intracellular parasites C. able to use glucose as an energy source D. All of the choices are correct.
Obligate anaerobes are usually poisoned by molecular oxygen but may grow in aerobic habitats if associated with facultative anaerobes that use up all available oxygen.
Answer the following statement true (T) or false (F)
How do most motor proteins ensure their movements are unidirectional?
A.) they couple a conformational change to a thermodynamically unfavorable reaction B.) they couple a conformational change to the hydrolysis of an ATP molecule C.) they couple a conformational change to the formation of an ATP molecule from ADP and Pi D.) they hydrolyze their bound GTP, effectively preventing movement in the reverse directoin E.) their asymmetrical structures support movement in only one direction
Match the letter of each example from childbirth to the appropriate component of a positive feedback loop.A. pituitary gland secretes oxytocin, which acts on the uterusB. uterine contractions increaseC. fetus is pushed against uterine openingD. receptors detect stretchE. brain receives and compares stretch informationEffector
What will be an ideal response?