Please match the virulence factor of Streptococcus pyogenes to its description.
C carbohydrate
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
A) Surface antigen that serves as the basis for alphabetical grouping; protects bacterium from lysozyme
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Zip1 is a protein in yeast that is required for synaptonemal complex formation. Assuming synaptonemal complexes are required for meiosis in yeast, where do you predict these cells arrest (stop progressing through meiosis)?
A. Prometaphase of meiosis I B. Metaphase of meiosis I C. Metaphase of meiosis II D. Between the zygotene and pachytene stages E. Diakinesis
If a dividing cell had no functional Cdk2 protein, the cell would not be able to ____
a. phosphorylate cyclins b. transcribe the Cdk2 gene c. enter G1 d. translate cyclin mRNA e. degrade cyclins
A mutation in the gene that codes for a connective tissue protein called fibrillin causes ____________________. Fill in the blank(s) with the appropriate word(s)
The above figure represents which of the
following chromosomal changes:a. inversion b. deletion c. duplication d. translocation e. aneuploidy