The first protein to have its amino acid sequence determined was:
A) myoglobin
B) keratin
C) hemoglobin
D) spider silk
E) beef insulin
Ans: E) beef insulin
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Muscles involved in control of posture are primarily composed of slow-twitch fibers
A. true B. false
What is the correct order of transcriptional events occurring after RNA polymerase binds to the promoter?
A. start of RNA synthesis, open complex formation, closed complex formation, promoter clearance B. closed complex formation, open complex formation, promoter clearance, start of RNA synthesis C. closed complex formation, open complex formation, start of RNA synthesis, promoter clearance D. open complex formation, closed complex formation, start of RNA synthesis, promoter clearance E. open complex formation, closed complex formation, promoter clearance, start of RNA synthesis
Which metabolic waste product is so toxic it must be converted into other forms before the kidney can excrete it?
a. urea b. carbon dioxide c. ammonia
d. oxygen e. electrolytes
Which of the following statements would Darwin have disagreed with?
A) Species change over time. B) Living species have arisen from earlier life-forms. C) Descent with modification occurs through inheritance of acquired characteristics. D) Descent with modification occurs by natural selection.