Indicate which of the following statements are true (T) or and which are false (F) with reference to immunoglobulin structure
a. __The antibody secreted by a plasma cell has a different specificity for antigen than the immunoglobulin expressed by its B-cell precursor.
b. __The amino-terminal regions of heavy and light chains of different immunoglobulins all differ in amino acid sequence.
c. __A flexible hinge region holds the heavy chain and light chain together.
d. __The heavy-chain constant region is responsible for the effector function of immunoglobulins.
e. __? and ? light chains have different functions.
a—F; b—T; c—F; d—T; e—F
You might also like to view...
________ is a substance found in the liver, lungs, and other body tissues that inhibits blood clotting
Fill in the blank(s) with correct word
A surgical procedure to remove all or part of a skin lesion for the purpose of diagnosis is called ________
A) biopsy B) dermatoplasty C) rhytidectomy D) skin grafting
Which of the following is NOT a risk factor for breast cancer?
A. Family history B. A first child after age 30 C. Relatively large breasts D. Obesity after menopause
What BEST characterizes a CT scan?
a. Uses radioactive substances to produce an x-ray image b. Gives a vertical front-to-back image of the body organs c. Magnetic and radio waves are used to create image d. Uses ionizing x-rays and a computer to produce a transverse image of the body organs