Infectious protein particles are called
A) Oncogenic viruses
B) Viroids
C) Spikes
D) Prions
E) Phages
D) Prions
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In the female reproductive cycle, the endometrium is thickest ____
a. during the menstrual phase b. during the proliferative phase
c. shortly before ovulation d. during ovulation e. during the secretory phase
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.
How many years did it take for the world population to reach approximately one billion?
a. 10 million b. 2.5 million c. 100 million d. 300 million e. 1.5 million
Most human cancers originate in which type of tissue?
a. neoplastic b. epithelial c. connective d. muscular e. nerve