Which of the following has a shortest half life
a) Synthroid,
b) Eltroxin
c) Cytomel (Theramed)
d) Armour
e) Liotrix
Ans: c) Cytomel (Theramed)
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Some members of the Domain Bacteria have
a. a nucleus. b. membrane-bound organelles. c. chloroplasts. d. photosynthetic ability.
What is the function of the 3' poly-A sequence in eukaryotic mRNA?
a. It provides an intron splicing signal. b. It provides protection from cytosolic enzymes. c . It helps with translation termination. d. It is the initial attachment site for ribosomes.
Which of the following is NOT an effective way to combat this infectious agent?
A) Be vaccinated. B) Have an active immune system. C) Produce more white blood cells. D) Take an antibiotic
Organisms maintain dynamic homeostasis (internal balance) through behavioral and physiological mechanisms. Which of the following statements is an accurate explanation of a negative feedback mechanism used by animals to regulate body temperature?
A) Squirrels are able to cool themselves during warmer months by producing more brown fat, which contains abundant mitochondria and a rich blood supply. B) Desert jackrabbits have unusually large ears that serve as solar heat collectors to enable them to maintain their body temperatures. C) A ground squirrel's hypothalamus detects changes in environmental temperatures and responds by activating or suppressing metabolic heat production. D) A goldfish slows its movements when the water temperature is lower.