The valence shell of hydrogen or helium is unstable when it contains two electrons.

Indicate whether the statement is true or false


False - stable

Biology & Microbiology

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Which of the following are defenses against herbivory?

_____ chlorophyll _____ terpenoids _____ nicotine _____ spines

Biology & Microbiology

A ___ usually phosphorylates and modifies the functional state of a number of distinct substrate proteins

a. phosphate b. receptor for tyrosine kinase c. kinase d. amino acid residue

Biology & Microbiology

Proteins can be regulated by the removal of phosphates by

a. protein phosphatases. b. phosphoproteases. c. protein phosphorylases. d. protein kinases.

Biology & Microbiology

Which of the following organs have cells that can be infected by Chlamydia trachomatis?

A. eyes B. trachea C. rectum D. urethra E. eyes, trachea, rectum, and urethra.

Biology & Microbiology