How is a T cell receptor similar to an IgM?
A. Both are produced by T cells.
B. Both can bind to a specific antigen.
C. Both are organized with variable and
constant segments.
D. Two answer options are correct: both can
bind to a specific antigen AND both are
organized with variable and constant
segments.
D
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A typical gene has _____ enhancer sequence(s); each enhancer sequence has ____ regulatory transcription factor
A. several; one B. several; several C. from 10-20; from 2-10 D. one; several E. one; from 2-10
Which type of cell acts an antigen-presenting cell?
a. neutrophils b. helper T cells c. cytotoxic T cells d. plasma cells e. dendritic cells
Growth at two replication forks arising from a single origin of replication produce a "bubble" as daughter DNA molecules form.
Answer the following statement true (T) or false (F)
What makes up most of the mass of an individual mushroom?
a. underground ascocarp b. underground mycelium c. above ground ascocarp d. above ground mycelium e. underground fruiting body