The nucleolus is the site of:

A. ribosome assembly.
B. uncoiling and unraveling of chromosomes.
C. lipid synthesis.
D. protein synthesis.
E. chromosome replication.


Answer: A

Biology & Microbiology

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Balanced polymorphism can be maintained by the combined actions of:

a. the founder effect and genetic drift. b. heterozygote advantage and genetic drift. c. heterozygote advantage and the founder effect. d. frequency-dependent selection and the founder effect. e. heterozygote advantage and frequency-dependent selection

Biology & Microbiology

Which of the following best describes processes that take place during cell communication to produce a cellular response?

A) A series of changes takes place in relay molecules through a signal transduction pathway.
B) Local regulators convert electrical signals to chemical signals to cause movement in a cell.
C) Signaling molecules detect changes in a cell's environment and trigger hormone release.
D) Transduction causes signaling molecules to bind to receptors on the surface of a cell.

Biology & Microbiology

A(n) ________ is a disease in which antibodies attack specific cells of the body.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Complementation studies can be performed in bacteria by

A) gene targeting. B) forming merodiploids with one copy of a bacterial gene on an F? plasmid. C) forming merodiploids with two copies of a bacterial gene on F? plasmids. D) forming diploids with two copies of the bacterial chromosome.

Biology & Microbiology