What is the chloroplasts' function in the cell?
a. They are the site of photosynthesis in eukaryotes.
b. They absorb and use energy from sunlight.
c. They synthesize high-energy carbohydrates.
d. All of the above.
d
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Chemolithotrophs that obtain electrons from donors such as sulfide use the same electron transport chains to obtain energy as chemoorganotrophs
Indicate whether the statement is true or false.
It is often stated that the phosphate bonds in ATP are "high energy," but in fact, they are not notably high in energy. Rather, they are easy to break, and the G of hydrolysis is a "useful" quantity of energy
What makes the phosphate bonds easy to break? A. They are close to the destabilizing nitrogenous base adenosine. B. The positive charges on amino groups repel each other. C. The negative charges on the phosphate groups repel each other. D. The high alkalinity attacks bonds between the phosphate groups.
The Environmental Protection Agency
a. regulates the agricultural application of chemicals. b. has called for further study on the effects of atrazine on amphibians. c. now encourages farmers to minimize the runoff of atrazine-laden water from fields. d. does all of these. e. does none of these.
Hot flashes, insomnia and mood swings are characteristic of ____
a. menarche b. menopause c. gametogenesis d. menstruation e. ovulation