Explain how prebiotics and probiotics may be useful in preventing acne.
What will be an ideal response?
Answer: By using prebiotics, it is possible to add nutrients that may encourage the growth of nonpathogens. Both prebiotics and probiotics may help to alter the skin
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Emphysema is caused by an increase in elastase, an enzyme that breaks down elastin. Predict the symptoms you would expect to see in a patient with emphysema.
A. Decreased ability of the lungs to expand and contract. B. Thickening of the extracellular matrix. C. Thinning of vertebral discs. D. Thinning of the cell wall. E. Thickening of the cell wall.
Why can't mirror or direct repeats form hairpins?
What will be an ideal response?
Which of the following is a difference between a viroid and a virus?
A. Viroids are alive and viruses are not. B. Viroids are composed solely of nucleic acid while viruses are composed of nucleic acid surrounded by a protein coat. C. Viroids are not infectious particles and viruses often cause disease. D. Viroids infect only plants while viruses infect only animals and prokaryotes. E. Viroids contain some genes important for their own replication while viruses rely entirely on host cell enzymes for their replication.
The nonprotein component of an enzyme that is firmly attached to the protein is called a(n)
A. holoenzyme. B. coenzyme. C. prosthetic group. D. apoenzyme.