Given the DNA sequence 5?-TAC AAA ATA CAG CGG-3?, which of these sequences represents a frameshift mutation?
A) 5?-TAG AAA ATA CAG CGG-3?
B) 5?-TAC AAA TAC AGC GGG-3?
C) 5?-TAC AAG ATA CAG CGG-3?
D) 5?-TAC AAA ATA CAC CGG-3?
E) 5?-TAC AAA ATA CAG AGG-3?
B
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Identify the numbered items in the accompanying figure. Include the following terms in your description. • presynaptic neuron • postsynaptic neuron • neurotransmitters waiting to be released • neurotransmitters released by the nerve impulse • synapse • receptors with bound neurotransmitters
What will be an ideal response?
After your eye exam, the optometrist breaks the bad news: "Your lens is a little too flat, and as a result it is focuses the image just in front of your retina." What kind of vision do you have?
A. astigmatism B. nearsighted C. farsighted D. night-blindness
Where does the lens FOCUS an image in the mammalian eye?
a. on the retina, using the entire surface of the retina b. primarily on the fovea c. on the rods only d. slightly in front of the retina, so the neural cells don't distort the image e. it depends on where you are looking; sometimes on the fovea, sometimes elsewhere on the retina
Coral reefs: a. remove carbon dioxide from water and air
b. provide compounds used for pharmaceuticals. c. provide protection from storm generated surf conditions. d. all of these choices.