Which of the following classes is comprised of carnivorous predators that are able to extend their stomachs through their mouths to feed?
A) Ophiuroidea
B) Holothuroidea
C) Asteroidea
D) Crinoidea
E) Echinoidea
Answer: C
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The functioning of enhancers is an example of _____
A) transcriptional control of gene expression B) a post-transcriptional mechanism to regulate mRNA C) the stimulation of translation by initiation factors D) post-translational control that activates certain proteins E) a eukaryotic equivalent of prokaryotic promoter functioning
Which of the following does not occur during the erythrocytic stage of the malarial life cycle?
A. The parasite reproduces asexually via schizogony, producing merozoites. B. The parasites are protected from the host's immune response. C. The parasite reproduces sexually producing microgametocytes and macrogametocytes. D. Sporozoites are produced within erythrocytes and are released by the infected red blood cells.
A patient of yours is injured in a car accident. The surgeon reports that while there is damage to the dorsal roots, the spinal cord and nerves otherwise appear intact. What functions would you expect to be affected in the patient?
A. The patient may lose somatic function, but should retain autonomic function. B. The patient may lose motor function, but should retain sensory perception. C. The patient may lose some sensory perception, but should retain motor function. However, lack of proprioceptive input may make muscle control difficult. D. The patient may lose parasympathetic function, but should retain sympathetic function. They should avoid stressful situations.
Why is Taq polymerase used in a polymerase chain reaction (PCR)?
A. Taq polymerase is more efficient than other DNA polymerases. B. Unlike other DNA polymerases, Taq polymerase is heat stable and survives the 94 degree denaturation step in PCR. C. Taq polymerase can produce DNA from an RNA template, unlike other DNA polymerases. D. Unlike other DNA polymerases, Taq polymerase is not inhibited by dideoxy nucleotides. E. Taq polymerase has proofreading activity and thus makes fewer errors than other DNA polymerases.