The primary purpose of the Krebs cycle is to
A. catalyze the phosphorylation of ADP from creatine phosphate.
B. convert lactate to pyruvate.
C. oxidize foodstuffs and transfer those electrons to pyruvic acid.
D. complete the oxidation of foodstuffs using NAD and FAD as hydrogen (electron) carriers.
Answer: D
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Various studies indicate that most people, especially obese people
a. lost the desired weight without exercise. b. overestimate their caloric intake. c. underestimate their activity level. d. underestimate their energy intake.
Tears, saliva, and vaginal secretions are rich in ______ and ______ that break down and destroy many microorganisms.
A. histamines; antigens B. antibodies; enzymes C. macrophages; killer T cells D. lymphocytes; neutrophils
Melanocytes contain a pigment to give skin and hair its dark color
Indicate whether the statement is true or false
Identify the combining form mastoid(o) with its closest definition.
A. Mastoid process B. Cornea C. Eardrum D. Hearing