Proteins contain twenty different subunits ____
a. that are the carriers of genetic information
b. arranged in a double helix attached to DNA
c. including thymine, cytosine, guanine, and adenine
d. in the form of nucleotides
e. in the form of amino acids
e
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Which of the following is the correct order of events in the control of the heartbeat?
1. activation of the SA node 2. contraction of the atria 3. contraction of the ventricles 4. activation of the AV node 5. transmission of the action potential through a set of modified muscle fibers A. 1, 2, 4, 5, 3 B. 1, 4, 2, 5, 3 C. 1, 3, 4, 2, 5 D. 1, 5, 4, 2, 3 E. 1, 2, 5, 4, 3
Somatostatin functions to inhibit both insulin and glucagon
Indicate whether the statement is true or false
There is an antibiotic called streptomycin that doctors prescribe for infection. The antibiotic combines with the bacteria's ribosomes causing them to lose their function. Consequently the cell dies and so the person gets better! In other words, the antibiotic destroys bacteria by
a. stopping photosynthesis b. preventing them from packaging materials c. stopping the production of ATP energy d. not allowing them to produce proteins.
Viruses in the marine environment (virioplankton) are very abundant.
Answer the following statement true (T) or false (F)