Transport of salts against their concentration gradients is energetically expensive.
Answer the following statement true (T) or false (F)
True
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Delayed hypersensitivity is ____ mediated.
A. humoral B. antibody C. cell
A 33-year-old female presents with eyes that have been red and irritated for the past month. Discharge from the eyes is not apparent. She also has a recurrent low-grade fever and a rash on her chest and legs. Her joints have been achy for the past few months, and her mouth has been so dry it is often difficult to swallow food. Antinuclear antibody testing is performed, and a speckled pattern is observed on HEp-2 cells. Which follow-up test result would you expect for this patient?
A.) Positive ANCA B.) Presence of anti-SS-A or anti-SS-B C.) Decreased rheumatoid factor D.) Presence of antibody to dsDNA
The molecule directly responsible for breaking down cAMP to inactive AMP is
A. phosphodiesterase. B. protein kinase A. C. protein phosphatase. D. adenylyl cyclase. E. GTPase.
________ molecules deliver amino acids to ribosomes during translation.
A. Messenger RNA (mRNA) B. Ribosomal RNA (rRNA) C. Transfer RNA (tRNA) D. Heterogeneous nuclear RNA (hnRNA)