In the mitochondria pyruvate molecules are converted into ____________________ molecules, which can enter the
Krebs cycle reactions. Fill in the blank(s) with the appropriate word(s).
ANSWER: acetyl-CoA
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Humans have become so dependent on fossil fuels that despite an increasing body of evidence that indicates burning these fuels is destroying aspects of the environment, little change in the sources of fuels has occurred
What types of alternative fuels can be used to reduce negative impacts on the environment?
The hormone oxytocin stimulates contraction of:
A. the smooth muscles in the walls of blood vessels B. the muscles of the stomach wall C. uterine muscles D. skeletal muscles
You want to experiment with microbial growth in various nutrients, so you inoculate a loopful of E. coli into a tube of honey. Which statement best describes what you expect to happen and why?
A. E. coli grows well in the honey because fructose is a good carbon source. B. E. coli do not grow because there is only sugar in the honey and no other nutrients. C. E. coli will not grow because the excessive sugar is toxic. D. E. coli does not grow because it has been dehydrated by the honey.
What is the diploid number of chromosomes in the cells in this activity?
a. 1 b. 2 c. 4 d. The plant and animal cells have different diploid numbers.