If a chemical agent acted to make the nuclear envelope pores impermeable to the passage of hormones, what effect would it have?
A. Both steroid and non-steroid hormones would continue to be effective.
B. Neither steroid nor non-steroid hormones would be effective.
C. Non-steroid hormones would continue to be effective but steroid hormones would be ineffective.
D. Steroid hormones would continue to be effective but non-steroid hormones would be ineffective.
Answer: C
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Explain the advantages of using recombinant DNA technology to produce human proteins in transgenic plants, animals, or cultured cells
What will be an ideal response?
The cells that normally lack a nucleus and have a relatively short life span in humans are
A. eosinophils. B. lymphocytes. C. neutrophils. D. erythrocytes. E. basophils.
Feedback inhibition, covalent modification, and allosteric regulation are all examples of ________.
A. compartmentalization B. regulation of gene expression C. posttranslational regulation D. metabolic channeling
Burkitt's lymphoma is a cancer of the lymphatic system. The endemic variant, common to equatorial Africa, commonly affects children who are also affected by chronic malaria
A recent study found that individuals with AA hemoglobin were twice as likely to develop Burkitt's lymphoma as those with the AS genotype. We saw a similar benefit of certain genotypes in cases of sickle cell disease. Recall that individuals who are ?A?S, ?A?C, or ?A?E have a survival and reproductive advantage over individuals who are homozygous ?A?A (and therefore succumb more easily to malaria) and over those who are homozygous for the mutant alleles (and therefore suffer from hereditary anemia). Resistance to malaria and Burkitt's lymphoma are both an example of ________ advantage. Fill in the blank(s) with correct word