Southern blotting is a technique for analyzing DNA. Indicate whether the statement is true or false
T
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How many bases are in a anticodon?
What will be an ideal response?
Explain the significance of what Loewi observed in his experiment with the two frog hearts.
A. It showed that neurons communicate with muscle by electrical signals. B. It suggests that a chemical substance released from the first heart, when added to the second heart, reproduced the effects of electrical stimulation. C. It suggests that all vertebrate hearts receive both inhibitory and excitatory signals from different nerves. D. It showed that nerves have a direct electrical effect on heart muscle.
Membrane sterols such as cholesterol function in animal cell membranes to ____
a. increase the rate of diffusion b. store cellular energy c. facilitate ion transport d. maintain membrane fluidity e. receive chemical signals
Genetic exchange between 2 homologous chromosomes is called
A. pleiotropy. B. crossing over. C. synapsis. D. independent assortment. E. allelic exchange.