Which of these is the end product of the complement system
a. cascade reaction
b. convertase 5a
c. complement factor 9
d. membrane attack complex
Ans: d. membrane attack complex
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Describe which diseases human papillomavirus (HPV) can cause in males and females. What is the most common symptom of HPV infection, and why is this of concern?
What will be an ideal response?
For each function described below, choose the cytoskeletal element it best characterizes (some of the functions listed are carried out by more than one cytoskeletal element): a. microtubules b. microfilaments c. intermediate filaments
________ provide structural support for epithelial cell shape (keratins) ________ enable movement of cells ________ enable movement of substances within cells ________ provide structural support for fibroblast cell shape (vimentins) ________ arrange and tether organelles within the cytoplasm ________ provide cellular movement as a component of cilia flagella ________ provide structural support for nuclear envelopes (lamins) ________ attach to the cytoplasmic surfaces of desmosomes ________ provide structural support to cells and layers of cells through attachment to adherens junctions ________ help cells to withstand compression when organized a spokelike array by the centrosome ________ separate chromosomes during cell division when organized in a spindle apparatus _______ provide a contractile ring to separate cells during cell division ________ support the plasma membrane and organize membrane proteins ________ shorten cell shapes during contraction What will be an ideal response?
The head of a sperm cell contains a specialized organelle called the ____ , which contains enzymes used to transverse the outer coating of the egg
Fill in the blank with the appropriate word.
Which of the following enzymes is a component of the large ribosomal subunit and catalyzes the formation of peptide bonds between an amino acid attached to a peptidyl-tRNA and an amino acid from an aminoacyl-tRNA?
A) Reverse transcriptase B) DNA polymerase C) Peptidyl transferase D) DNA ligase E) ?-galactosidase