Bio 114 Exam 4 (UA); Questions &
Answers…Grade A+
Operator Correct answer-The "switch" is a segment of DNA called an operator usually
positioned within the promoter
Operon Correct answer-the entire stretch of DNA that includes the operator, the
promoter, and the genes that they control
R...
Bio 114 Exam 4 (UA); Questions &
Answers…Grade A+
Operator Correct answer-The "switch" is a segment of DNA called an operator usually
positioned within the promoter
Operon Correct answer-the entire stretch of DNA that includes the operator, the
promoter, and the genes that they control
Repressor Correct answer-A protein that binds to an operator and physically blocks RNA
polymerase from binding to a promoter site
Corepressor Correct answer-a molecule that cooperates with a repressor protein to
switch an operon off
Inducer Correct answer-A specific small molecule that inactivates the repressor in an
operon.
Cell Differentiation Correct answer-the process by which a cell becomes specialized for a
specific structure or function.
Cytoplasmic Determinants Correct answer-Maternal substances in egg that influence the
course of early development.
Oncogenes Correct answer-are cancer-causing genes in some types of viruses.
, Bio 114 Exam 4 (UA); Questions &
Answers…Grade A+
Proto-oncogenes Correct answer-the corresponding normal cellular genes that are
responsible for normal cell growth and division.
Tumor Suppressor Genes Correct answer-normally help prevent uncontrolled cell growth
Tumor-suppressor proteins Correct answer-Repair damaged DNA
Control cell adhesion
Act in cell-signaling pathways that inhibit the cell cycle
Virus Correct answer-an infectious particle consisting of genes packaged in a protein coat
Capsid Correct answer-The protein shell that encloses a viral genome. It may be rod-
shaped, polyhedral, or more complex in shape.
Capsids are built from protein subunits called? Correct answer-Capsomeres
What is the lytic cycle? Correct answer-a phage replicative cycle that culminates in the
death of the host cell
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