The surface of each B lymphocyte is covered with about 250,000 to 500,000 identical copies of (BCR/MHC/TCR)
What will be an ideal response?
BCR
Bloom's Taxonomy: Knowledge
Section: Elements of Adaptive Immunity
Learning Outcome: 16.16
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Generally speaking, nutritionally variant streptococci require what ingredient not found in most conventional media?
a. Vitamin B6 b. Nalidixic acid and its components c. Nicotinamide adenine dinucleotide (NAD) enrichment d. Blood or blood products
Many sponges are hermaphroditic, which means that ____
a. both males and females are filter feeders b. both males and females produce sperm c. a single individual produces both sperm and eggs d. only males have flagellae e. both males and females produce gemmules
Which of the following is used to describe the openings to the hearts in animals with open circulatory systems?
a. atria b. ostia c. septa d. ventricles
The operon segment composed of the gene that codes for a protein repressor is called the ________.
A. regulator B. structural locus C. operator D. promoter