When is a bacterial cell more likely to be phagocytized?

A) when antibody binds antigen on its surface
B) when compliment binds an antigen-antibody complex
C) when antibody recognizes self antigens
D) after antibody class-switching


Answer: B

Biology & Microbiology

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Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of _____

I) an autocrine signal II) a paracrine signal III) an endocrine signal A) only I and II B) only II and III C) only I and III D) I, II, and III

Biology & Microbiology

Genetic map units represent

a. absolute physical distances between genes. b. locations of different alleles of a gene. c. the chromosome on which a given gene is located. d. the actual DNA sequence of a gene. e. relative positions of genes with respect to each other.

Biology & Microbiology

The transmission of information from one neuron to another has been found to occur by all of the

following mechanisms EXCEPT

a. neurotransmitters released from vesicles. b. components of a membrane can act as neurotransmitters. c. electrical connections. d. chemical signals transmitted through electrical connections. e. a gas that diffuses through a cell membrane.

Biology & Microbiology

Explain why the seed plants would have an advantage over the seedless plants within a community.

What will be an ideal response?

Biology & Microbiology