Which is incorrect about purines?
A. They are found within nucleotides.
B. They include adenine and guanine.
C. They are only found in DNA, not in RNA.
D. They are always paired with a specific pyrimidine.
E. They are nitrogenous bases.
Answer: C
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Which of the following is true of the protein ubiquitination pathway?
A. The ubiquitin carboxyl terminus is covalently linked to the protein targeted for degradation. B. The ubiquitin is covalently linked to the amino terminus protein targeted for degradation. C. The protein targeted for degradation is modified by three different enzymes in the pathway. D. A single molecule of ubiquitin linked to the target protein is sufficient for destruction.
The diastolic pressure for a normal young adult is
a. 60 mm Hg. b. 80 mm Hg. c. 100 mm Hg. d. 120 mm Hg. e. 140 mm Hg.
Which of the following is a true statement about proteins?
A. Proteins are used to insulate the body from cold and protect it from abuse. B. Extra proteins are stored in the liver and brain. C. Proteins are made up of amino acids bonded together. D. Proteins are used to produce ATP for the cell. E. Even small changes in temperature and pH will immediately destroy a protein's shape and function.
Which of the following choices shows the order in which white blood cells migrate to infected tissues?
A) Macrophages - monocytes B) Lymphocytes - macrophages C) Neutrophils - macrophages D) Neutrophils - monocytes E) Macrophages - neutrophils