Which of the following hormones does NOT act using a second messenger system?
A) glucagon
B) leptin
C) testosterone
D) growth hormone
Answer: C
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Coacervates can
A. absorb chemicals from the environment. B. separate their internal contents from their surroundings. C. be synthesized in the lab. D. All of the above are correct.
Which of the following is an example of mutualism?
a) a clown fish lives inside a sea anemone and is protected by it, while the anemone receives nothing from the clown fish b) a jaguar kills and consumes a gazelle c) a remora fish removes algae and parasites from a shark's skin and receives protection in return d) a wasp paralyzes a caterpillar and lays its egg inside it e) a female cuckoo lays its egg in the nest of a smaller bird, which then raises the cuckoo chick
In an egg, cytoplasmic localization of mRNA occurs when the transcripts
a. are bound to specific proteins. b. are small enough. c. are attached to fat soluble molecules. d. contain specific introns.
e. are attached to ribosome subunits manufactured in the nucleus.The oil globules that result when a water and oil
mixture is shaken are due to a(n) __________ interaction. a. acidic b. basic c. hydrophilic d. hydrophobic e. ionic