Cytosine, uracil, and thymine are single-ringed nitrogen-containing organic bases called ____________________
Fill in the blank(s) with correct word
pyrimidines
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The material released from bacteria that may lead to shock and death in septicemia is
A. exotoxin. B. protein A. C. endotoxin. D. interferon.
Differentiate between primary, secondary, tertiary, and quaternary structure of proteins
What will be an ideal response?
When Melvin Calvin and Andrew Benson reduced the CO2 available to cells in the photosynthesis
experiments, they discovered that RuBP accumulated. Why did this molecule accumulate?
a. There wasn't sufficient light to drive photosynthesis. b. The cells had too little ATP. c. There were not enough reactants to generate 3PGA. d. The RuBP was defective in structure and unable to form a bond with CO2. e. Rubisco was inhibited by the RuBP excess.
Life probably would never have emerged on Earth if
the ancient atmosphere had been the same as the present one in regard to a. carbon dioxide. b. hydrogen. c. oxygen. d. nitrogen. e. carbon monoxide.