Which of the following is diagnosed by detection of antibodies against the causative agent?
A) nongonococcal urethritis
B) gonorrhea
C) syphilis
D) lymphogranuloma venereum
E) candidiasis
C
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Which group of animals are living representatives of the theropods, a lineage of bipedal predatory dinosaurs?
a. birds b. crocodiles and alligators c. snakes and lizards d. turtles e. mammals
Some enzymes build new molecules, and others metabolize or break them down. For example, digestive enzymes such as peptidases and lipases break down proteins and lipids, respectively. Genetic information is encoded in the DNA for proteins, many of which are enzymes. This means that a harmful or lethal genetic mutation often results in a malformed enzyme that cannot function. If a person suffers a mutation that results in malformed peptidase, what problem would you expect them to would have?
a. unable to swallow medication properly b. high body temperature c. unable to digest protein d. unable to metabolize fats
Experiments by Chapeville and colleagues proved that the genetic code derives its specificity through what interactions?
A) hydrogen bonds and disulfide bonds that maintain the shape of the tRNAs B) complementary base pairing between amino acids and tRNA C) complementary base pairing between tRNA and mRNA D) ionic bonds between the small and large subunits of the ribosome E) hydrogen bonding between the ribosomal subunits and the mRNA
Different modification of the histone have different effects on gene expression. For instance, the ninth amino acid of histone 3 is a lysine (H3K9 ) can be acetylated once or methylated up to three times. Which of the following is true regarding H3K9
modification? A) If H3K9 is acetylated, then the gene will be repressed. B) If H3K9 has a single methyl group, then the gene will be repressed. C) If H3K9 has two methyl groups, then the gene will be activated. D) If H3K9 has three methyl groups, it is maximally activated compared to only having one methyl group. E) If H3K9 has three methyl groups, then the gene will be repressed.