Which nucleic acid molecules are directly involved in transcription, but not translation in the synthesis of a particular polypeptide?
A)rRNA
B)tRNA
C)mRNA
D)DNA
D)DNA
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If hemoglobin levels fall by half, what happens to the O2 carrying capacity of the blood?
a. remains the same b. doubles c. drop by 25% d. drops by 50% e. drops by 75%
Which accurately describes the handling of urea by the kidney?
A. None of the urea that reaches the kidney is excreted in the urine. B. About half of the urea that is filtered is excreted in the urine. C. All of the urea that reaches the kidney is excreted in the urine.
Which of the following structures is NOT found in a synovial joint?
A. Joint capsule B. Ligaments C. Articular cartilage D. Synovial membrane E. All of these structures are found in a synovial joint.
A thrombus in the first branch (not including coronary arteries) off of the aortic arch might affect the flow of blood to which of the following structures?
A. right arm B. right side of the brain C. left side of the brain D. left arm E. both the right arm and the right side of the brain