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

Biology & Microbiology

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a. receptor tyrosine kinase b. G-protein coupled receptors c. MAPK d. adenylyl cyclase e. guanylyl cyclase

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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

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Water is always released as a product in hydrolysis reactions

__________________Indicate whether the statement is true or false.

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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

Biology & Microbiology