Which of the following occurs when ribosome encounters either UAA or UAG?
a. Ribosomal subunits leave the mRNA.
b. Ribosomal subunits bind to the mRNA.
c. The mRNA template initiates translation.
d. Amino acids form on the mRNA template.
a. Ribosomal subunits leave the mRNA.
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Which of the following statements is true regarding neurotransmitters and synaptic signaling? Select all correct choices
A. All neurotransmitters are also hormones. B. All synaptic signaling is rapid. C. All synaptic signaling occurs between nerve cells. D. All neurotransmitters are released into the blood stream.
In the earliest karyotypes, chromosomes were distinguished by
A) specific size order. B) general size classes. C) banding patterns. D) stage of the cell cycle.
What is the role of the epiglottis?
A. Prevents food from entering the windpipe B. Produces vocal sounds C. Filters dust and other impurities from entering the respiratory system D. Produces the positive or negative pressures that force air into or out of the lungs
Which statement best describes the cell theory?
a. All living organisms grow and develop. b. All living organisms respond to stimuli. c. All living organisms are composed of basic units called cells. d. All living organisms can move from one place to another in order to find food or to escape predators. e. All living organisms can form a population of organisms that is able to adapt to the environment