What substance is the most important stimulus in the control of respiration? CO2 How is its production linked to changes in metabolic rate, such as occur during exercise?
What will be an ideal response?
Exercise increases the amount of CO2 and decreases the amount of O2. Rising levels of CO2 stimulate increases in the depth and rate of breathing, resulting in moving more CO2 out of the body and more O2 into the body.
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Substrate-level phosphorylation transfers
phosphate groups from a. substrate. b. coenzyme. c. the electron transfer chain. d. ATP. e. the Krebs cycle
Carbon-12 has six protons and six neutrons in its nucleus. Carbon-14 has six protons and eight neutrons in its nucleus and is radioactive. Carbon-14 is an example of a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is(are) used in the overall reactions for photosynthesis?
a) carbon dioxide. b) water. c) light. d) all of the above.
In eukaryotes, each type of RNA polymerase recognizes a different
A. start codon B. stop codon C. promoter D. transcription factor E. release factor