A constitutive mutation in the lac operon may be of several types. Name two types of constitutive mutations

What will be an ideal response?


lacI - and lacOc

Biology & Microbiology

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The cortical reaction causes

A. the zona pellucida or vitelline layer to harden. B. the embryo to embed into the uterus. C. egg membrane depolarization. D. the sperm to bind to the egg membrane. E. fast block polyspermy.

Biology & Microbiology

Under the right conditions, an electron can

a. move to a lower energy level. b. enter an orbital shared by two atoms. c. move to a higher energy level. d. move from one atom to another atom. e. all of these

Biology & Microbiology

During which stage of the cell cycle do the chromosomes duplicate?

A. telophase B. prophase C. mitosis D. anaphase E. interphase

Biology & Microbiology

Effects of bacterial exposure may lead to disease in the host. Place the following occurrences in the proper sequence or order.

A) disease, infection, contact B) contact, disease, infection C) contact, infection, disease D) infection, contact, disease

Biology & Microbiology