What kind of bond holds two water molecules to each other?

A) hydrogen bonds
B) ionic bonds
C) nonpolar covalent bonds
D) polar covalent bonds


A

Biology & Microbiology

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The rRNA gene sequences of hyperthermophilic Archaea and Bacteria have diverged ________ over time, likely due to ________

A) relatively little / strong constraints on sequence changes at higher temperatures B) substantially / higher mutation rates at higher temperatures C) relatively little / low mutation rates in these ancient organisms D) substantially / DNA damage at higher temperatures

Biology & Microbiology

General type of reaction for the formation new biological material

a. Anabolism b. Respiration c. Catabolism d. Fermentation

Biology & Microbiology

The building blocks of nucleic acids are

a. amino acids. b. nucleotides. c. pentose sugars. d. phosphate groups. e. nitrogenous bases.

Biology & Microbiology

After a region of DNA has been replicated, ________ removes the RNA primers

A) DNA polymerase I B) DNA polymerase III C) DNA helicase D) RNA primase E) DNA ligase

Biology & Microbiology