Which of the following bacterial structures is incorrectly matched with a function?
A. Ribosomes - protein synthesis
B. Nucleoid - hereditary material
C. Plasmids - contain genes essential for growth and metabolism
D. Inclusions - excess cell nutrients and materials
E. Cytoplasm - dense, gelatinous solution
Answer: C
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Match each of the proteins involved in DNA replication with its function
a. DNA helicase b. Topoisomerase II c. Single-stranded binding proteins d. DNA polymerase _____ Attaches DNA nucleotides to an RNA primer _____ Unwinds the DNA duplex _____ Relieves the stress on the replication fork caused by unwinding _____ Proofreads the growing DNA strands and replaces mismatched nucleotides _____ Prevents strands of DNA from rejoining after being unwound What will be an ideal response?
One way that antibiotic-resistant strains of bacteria arise is that patients do not follow the instructions for taking the drug. In a typical scenario, a drug may be prescribed for a week, but the patient may stop taking it after 2 to 3 days if they start to feel better. Then when the infection flares up again, they take the rest of their dose. Why would this scenario lead to drug resistance?
A. The first round of treatment gives the bacteria a chance to learn how to metabolize the drug. B. A patient begins to develop resistance to the drug. C. The body clears the drug faster, once it is exposed a second time. D. The first round of treatment does not kill the most resistant bacteria, which then increase in number. E. The first round of treatment suppresses the immune system, making the patient more susceptible to other infections.
A water-vascular system that operates the tube feet is characteristic of the ____
a. arthropods b. annelids c. chordates d. mollusks e. echinoderms
Arrange the following entries in the order in which air contacts them as air is drawn into the body. a. trachea b. bronchiole c. pharynx d. alveoli e. larynx
A) e, c, b, a, d B) c, a, e, d, b C) b, d, a, c, e D) c, a, e, b, d E) c, e, a, b, d