The tube feet of sea stars are used primarily for ____
a. excretion of excess water
b. locomotion
c. reproduction
d. circulation
e. sensation
ANSWER: b
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Which of the following can cause allergy symptoms and inflammation by degranulation?
A) dendritic cells B) erythrocytes C) macrophage D) polymorphonuclear leukocyte
What is alternative RNA splicing?
a. a mechanism for cleaving RNA into progressively smaller pieces for disposal b. a mechanism for patching together multiple RNA transcripts to form large and complex instructions for quaternary level proteins c. a mechanism that allows different protein products to be produced from one gene when different exons are combined to form the mRNA d. an out of control splicing mechanism only seen in cancerous cells
You read about a drug designed to release more dopamine from the synaptic terminals of certain brain neurons. Based on the drug's description, you know it was designed to fix synaptic function and thus alleviate
A. epilepsy. B. insomnia. C. Alzheimer's disease. D. Huntington's disease. E. Parkinson's disease.
Which of the following is NOT a function of plastids?
A) Extracting energy from food and converting it to ATP B) Storing pigments C) Storing photosynthetic products D) Carrying out photosynthesis