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

Biology & Microbiology

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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

Biology & Microbiology

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?

Biology & Microbiology

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

Biology & Microbiology

Photorespiration occurs most on:

A) hot, dry days. B) cold, dry days. C) cloudy, rainy days. D) hot, humid days. E) cool, cloudy days.

Biology & Microbiology