C4 photosynthesis is an adaptation to hot, dry conditions in which:
A. oxygen is stored in the root
B. light energy is stored in chloroplasts
C. CO2 is fixed and stored in the leaf
D. water is stored in the stem
Answer: C
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NO binds to and activates____ to trigger its cellular response
a. receptor tyrosine kinase b. G-protein coupled receptors c. MAPK d. adenylyl cyclase e. guanylyl cyclase
As the action potential peaks, ____
a. the activation gates of Na+ channels close b. the inactivation gates of Na+ channels close
c. the activation gates of K+ channels close d. the inactivation gates of Na+ channels close e. Na+/K+ active transport pumps are activated
Water is always released as a product in hydrolysis reactions
__________________Indicate whether the statement is true or false.
What is a point mutation?
A) a mutation that affects only one metabolic pathway B) a mutation found at a single base pair in the genome C) a mutation that affects a single cell D) a mutation in which one chromosome is lost E) an error in DNA that is caused by malfunctioning of DNA ligase