If a condenser is analogous to the Miller-Urey experiment, which of the following is analogous to primordial Earth?
a. a primeval sea
b. water vapour
c. cold temperature
d. lightning
Ans: c. cold temperature
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Which of the following aspects of collagen would be directly affected by a defect in procollagen peptidase?
A) synthesis B) secretion C) extracellular assembly D) binding to fibronectin E) all of the above
You are interested in mapping the relative positions of three genes in the E. coli genome and have access to several cell types to use for the mapping:
a) Describe F?, F+, Hfr, and F' bacterial cell types. b) How would you use one or more of these cell types to map genes A, B, and C in the E. coli genome? c) If you found that the results were A = 10, B = 5, and C = 3 (in the correct units), what could you conclude about the order and proximity of the three genes? What will be an ideal response?
In mammals, blood returning from the head will pass through the ________ just before entering the right atrium
A) left atrium B) superior vena cava C) inferior vena cava D) aorta
Photorespiration occurs most on:
A) hot, dry days. B) cold, dry days. C) cloudy, rainy days. D) hot, humid days. E) cool, cloudy days.