One of the principal capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a(n) ________ capsid.
Fill in the blank(s) with the appropriate word(s).
icosahedral
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In what groups of vertebrates can you find internal fertilization? (Select all correct choices.)
A. mammals B. reptiles C. birds D. fish E. frogs
Which type of molecule organizes transmembrane proteins into lipid rafts?
a. phospholipid b. glycolipid c. cholesterol d. glycoprotein
What is the function of the stem part of the Y-shaped antibody (that is, the part formed by the two heavy chains joined together)?
a. It recruits immune cells to destroy the antibody antigen clump. b. It stimulates T cells to attack bacteria and other foreign cells. c. It attaches to foreign antigens, producing a large antibody antigen clump. d. It attaches the antibody to the B cell membrane. e. It has proteolytic activity, degrading viral proteins.
What is a feature that puts Archaea more closely related to Eukaryotes?
A. They both have plasma membranes with fatty acids B. They both have circular chromosomes C. They both have similar transcription and translation machinery D. They both have peptidoglycan in their cell walls