Which of the following statements about biofilms is true?
a. They are formed by prokaryotes living in a watery environment.
b. They may develop on surgical implants.
c. An example is dental plaque.
d. They are formed by prokaryotes living in a watery environment and they may develop on
surgical implants.
e. They are formed by prokaryotes living in a watery environment, they may develop on
surgical implants, and an example is dental plaque.
E
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Which whorl of the flower contains the female reproductive parts?
A. whorl 2 B. whorl 3 C. whorl 1 D. whorl 4 E. whorl 5
Fast-twitch muscle fibers are powered primarily by ATP from which source?
1.electron transfer chain 2.acetyl co-A 3.lactate fermentation 4.ethanol fermentation
Coenzymes function to
A. change the shape of enzymes, allowing different additional substrates to bind. B. dilate blood vessels, allowing more blood to flow, allowing more substrate to reach enzymes. C. interact directly with enzymes, either enabling the reaction to occur or making the substrate-enzyme interaction more efficient. D. denature the enzyme, stopping the chemical reaction from occurring. E. absorb excess hydrogen and hydroxide ions, keeping the pH relatively stable, so that reactions can occur most efficiently.
Due to a mutation in a smooth muscle gene, the blood vessels in the skin of a certain strain of mouse become dilated when temperature falls below a certain point. Based on the likely outcome of this mutation, what precautions should the researchers take to maintain the health of their mice?
A. The mice will be susceptible to high blood pressure, and should not be provided with exercise wheels. B. The mouse room should be maintained at a cooler than normal temperature. C. The mice will have weak muscles, and should be provided with exercise wheels. D. The mouse room should be consistently maintained at a warm temperature.