What’s the role of oxygen in cellular respiration?
What will be an ideal response?
Answer: Oxygen is the final step of the electron transport chain, and enables a large release of energy due to its high electronegativity.
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A molecular clock is
A. a clock that uses atoms for accurate time keeping. B. an estimate of the rate of accumulation of genetic divergences between two populations. C. a tool used to identify the rate of mutation, and is the same for all genes. D. a tool for studying evolution that has no real-world applications.
Inserting a cloned gene for a certain plasma membrane transporter into crop plants could lead to
A. the evolution of nodule-formation on the crop plant. B. plants taking up enough minerals that they no longer need to photosynthesize. C. the ability of a plant to produce its own micronutrients. D. extra uptake of minerals that would fortify the crop for human consumption. E. elevated CO2 levels in the atmosphere.
The Pacinian corpuscle is used in detecting
a. sound. b. pressure. c. chemicals. d. sight. e. chemical differences.
In addition to the genital tract, various strains of Chlamydia trachomatis can infect which of the following?
A) lymph nodes B) the lungs C) the conjunctiva D) lymph nodes and conjunctiva E) lymph nodes, lungs, and conjunctiva