A ____ is an extracellular signaling molecule that exerts its effect at very low concentrations.

A. statolith
B. protein receptor
C. plant hormone
D. cytochrome
E. phytochrome


Answer: C

Biology & Microbiology

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Rolling circle replication of the lambda genome differs from replication of a bacterial chromosome in that

A) bidirectional replication forks are not formed. B) only a single strand of the genome is copied. C) no concatamers are formed. D) only a single strand of the genome is copied and no concatamers are formed.

Biology & Microbiology

The separation of members of a gene pair from each other during gamete formation is called ____________________

Fill in the blank(s) with correct word

Biology & Microbiology

For heart muscles to beat in a coordinated rhythm ions must move from one cell to the next through ____.

A. gap junctions B. hemidesmosomes C. focal adhesions D. adherens junctions E. desmosomes

Biology & Microbiology

What is the result when a well-tested hypothesis is supported by many independent studies in the scientific community?

A) The hypothesis would be considered a scientific theory. B) The hypothesis is now be referred to as a prediction. C) Further experiments would not occur unless a sufficient alternative is proposed. D) The hypothesis is a fact that cannot be refuted.

Biology & Microbiology