Which of the following is the most likely explanation for hypothyroidism in a patient whose iodine level is normal?
A) greater production of T3 than of T4
B) hyposecretion of thyroid-stimulating hormone (TSH)
C) hypersecretion of thyroid-stimulating hormone (TSH)
D) a decrease in the thyroid secretion of calcitonin
B
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If healthy men have a range of body fat from 3 to 29% and healthy women have a range of body fat from 12 to 32%, what would you predict for the sex of an individual having 20% body fat?
A) The individual is male. B) The individual is female. C) The individual's sex can't be predicted from body fat percentage. D) No one has 20% body fat.
In catabolic repression, cells use the least abundant carbon source first
Indicate whether the statement is true or false.
Photorespiration occurs because __________
A. there is more O2 than CO2 in the atmosphere B. rubisco is a slow catalyst C. rubisco is a selective catalyst D. there is more O2 than CO2 and rubisco is a slow catalyst E. there is more O2 than CO2 and rubisco is a selective catalyst
The formation of ADP from ATP can be defined as a hydrolytic reaction
Indicate whether the statement is true or false