Please match the virulence factor of Streptococcus pyogenes to its description.
Capsule
A) Surface antigen that serves as the basis for alphabetical grouping; protects bacterium from lysozyme
B) Toxin that causes beta-hemolysis on blood agar and injures cells of the host
C) Enzyme that plays a role in invasion by leading to the digestion of fibrin clots
D) Projecting surface antigen that facilitates adherence and resists phagocytosis
E) Chemical surface layer that prevents an immune response by the host
F) Enzyme that promotes invasion into tissues by breaking down the binding substance in connective tissues
D) Projecting surface antigen that facilitates adherence and resists phagocytosis
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In cats an X-linked pair of alleles, B and b, controls color of fur. The alleles are incompletely
dominant: B produces black, b produces yellow, and Bb produces tortoise-shell. (a) A yellow cat had a litter of two tortoiseshell kittens and one yellow. What is the sex of the yellow kitten? (b) A tortoiseshell cat brings home a litter of black, yellow, and tortoiseshell kittens. The color of which sex would tell you the color of the tomcat that produced them? (c) A yellow male is crossed with a tortoiseshell female. If the female has all male kittens in her litter of four, what color(s) would they be? (d) A tortoiseshell cat brings home her litter of black, yellow, and tortoiseshell kittens. By what method could you possibly decide whether the male parent was the black tomcat next door? What will be an ideal response?
In genetics, map units express the distance between:a
chromosomes during metaphase. b. two loci on a chromosome. c. alleles. d. polar bodies. e. homologous chromosomes.
What molecule is responsible for translation of the four-letter "nucleic acid language" (A, T, G, and C nucleotides) into the 20 "amino acid language" of proteins by bringing in amino acids to the ribosome?
A) Messenger RNA B) Ribosomal RNA C) Transfer RNA D) DNA
At the end of the cyclic electron pathway, the energy-spent electron returns to
What will be an ideal response?