Colon Punctuation: Definition, Uses, and Placement
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Questions and Answers

What is the primary function of K cells?

  • To produce antibodies against pathogens
  • To regulate the immune response through cytokine production
  • To recognize and kill infected cells or tumor cells (correct)
  • To recognize and present antigens to T cells
  • Which of the following characteristics distinguishes K cells from T cells?

  • Ability to recognize and kill infected cells
  • Activation by IL-2 and IL-12
  • Lack of expression of CD4 or CD8 (correct)
  • Expression of CD4 or CD8
  • What is the role of IL-2 and IL-12 in K cell activation?

  • To induce apoptosis in K cells
  • To produce antibodies against pathogens
  • To inhibit K cell activation
  • To activate K cells (correct)
  • What is the mechanism by which K cells kill target cells?

    <p>Through the release of granzymes and perforin</p> Signup and view all the answers

    What is the importance of K cells in the immune response?

    <p>To recognize and eliminate infected cells or tumor cells</p> Signup and view all the answers

    Study Notes

    Definition and Function

    • The colon (:) is a punctuation mark used to introduce a list, quotation, or explanation.
    • It is also used to separate two independent clauses when the second clause explains or amplifies the first.

    Uses of Colon

    • To introduce a list:
      • I have three favorite foods: pizza, sushi, and tacos.
    • To introduce a quotation:
      • The CEO said: "We will do our best to improve the company's performance."
    • To separate two independent clauses:
      • I have one goal: to finish this project on time.

    Differences from Semicolon

    • A colon is used to introduce a list or explanation, while a semicolon (;) is used to separate two independent clauses that are closely related in meaning.
    • A colon is stronger than a semicolon, implying a closer relationship between the clauses.

    Placement and Spacing

    • A colon is placed outside of quotation marks.
    • There should be no space before a colon, but one space after it.

    Common Mistakes

    • Using a colon after a verb, instead of a comma.
    • Using a colon to separate two independent clauses that are not closely related in meaning.
    • Forgetting to capitalize the first word after a colon.

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    Description

    Learn about the colon punctuation mark, its uses, and how it differs from a semicolon. Understand how to use a colon to introduce lists, quotations, and explanations, and avoid common mistakes.

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