Which of the following best describes the relationship between an antibody and an antigen?
a. An antibody is one response to an antigen.
b. An antibody is produced by T cells and an antigen is a foreign protein.
c. An antigen is presented by antigen presenting cells to plasma cells, which produce
antibodies.
d. An antigen is a disease-causing organism, and antibodies are produced by B cells.
e. An antibody induces antigen formation.
A
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Which of the following statements regarding transcription only apply to eukaryotes and not to prokaryotes?
A. A single RNA polymerase transcribes genes that encode mRNAs, tRNAs, and rRNA. B. Sigma (?) subunit detaches from RNA polymerase shortly after transcription has initiated. C. The C-terminal domain of the polymerase is phosphorylated after transcription has initiated. D. RNA synthesis is inhibited by actinomycin D. E. RNA synthesis is inhibited by rifampicin.
Which of the following is NOT true of a stress or "fight-or-flight" response?
A. Energy stores such as adipose tissue and glycogen are broken down to mobilize fatty acids and glucose. B. The heart rate increases and airways are dilated to promote maximum oxygen intake. C. Elevations in cortisol are needed to increase glucose. D. Catabolic hormones are activated. E. Leptin levels are increased to enhance appetite.
Which proteins recognize and bind molecules from other cells that act as chemical signals?
a. transport proteins b. recognition proteins c. receptor proteins d. cell adhesion proteins e. nuclear proteins
Explain why most adults do not have to think about how to walk even though they did when they were toddlers
What will be an ideal response?