Studies using fissure water from gold-mining operations nearly 3 km deep indicate that the bacteria present use what for energy?
a. organic carbon
b. sulfur
c. iron
d. H2
Answer: D
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What compound served to contain interacting organic molecules within a protocell?
a. RNA b. DNA c. lipids d. single amino acids e. amino acid polymers
Genes can be duplicated when a processed messenger RNA, from which introns have been spliced out, is reverse-transcribed to form a double-stranded DNA segment that is reintegrated into the main chromosome
What is the name for this process that may form nonfunctional pseudogenes?
Which of the following is a lactic acid bacterium used in the production of food?
A) Aspergillus oryzae B) Gluconobacter C) Leuconostoc D) Penicillium E) Saccharomyces cerevisiae
Deficiency of which nutrient can cause muscle cramps, irregular heartbeat, or paralysis?
A) iron B) sulfur C) copper D) potassium