During photosynthesis ____ diffuses into the leaf, while ____ diffuses out of the leaf
a. carbon dioxide; oxygen
b. oxygen; carbon dioxide
c. oxygen; water vapor
d. water vapor; carbon dioxide
e. water vapor; oxygen
a
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Some ________ influence histone modification reactions.
A) microRNAs B) histones C) p53 genes D) scaffolding proteins E) tumor suppressors
What is the evolutionary advantage of bacteria producing restriction endonucleases?
A. These enzymes are a defensive measure of bacteria to defend themselves against invading DNA of bacteriophages. B. Bacteria use these enzymes to attack other bacteria and destroy their DNA. C. They make these enzymes for humans to use in manipulating DNA. D. Bacteria use these enzymes to repair their own mistakes made during DNA replication.
Which of the following is a unit of energy?
A) calorie B) bond C) watt D) mole E) both A and B
Animals remove ________ from organic molecules, which drives the synthesis of ________.
A. electrons; ATP B. carbon; ATP C. electrons; CO2 D. nitrogen; H2O E. protons; O2