What characteristic would the R groups of amino acids have if they are located within the interior of biological membranes?
A. The R groups would be able to form ionic bonds.
B. The R groups would be polar.
C. The R groups would be hydrophilic.
D. The R groups would hydrophobic.
Answer: D
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The hypothalamic hormone that triggers the secretion of follicle-stimulating hormone (FSH) is _____
A) luteinizing hormone (LH) B) estradiol C) progesterone D) human chorionic gonadotropin (hCG) E) gonadotropin-releasing hormone (GnRH)
Refer to the figure above. A branched metabolic pathway synthesizes two related amino acids (D and F). If there is a genetic defect, resulting in a nonfunctional enzyme (3), how could you ensure that adequate amounts of the amino acid F are synthesized?
A) Supplement intermediate B. B) Supplement intermediate C. C) Add enzyme 2 to the medium. D) Supplement with intermediate E.
A cell that has lost its capacity to grow in vitro as a monolayer is now
A) benign. B) malignant. C) transformed. D) anchorage independent. E) free ranging.
This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes:
A. Anaphase B. Metaphase C. Telophase D. Prometaphase