Week 3 - Intro to bio, chemistry for bio

Front

What are the 4 macromolecules essential for life?

Back

Proteins, lipids, carbohydrates, nucleic acids.

Front

True or False: An atom with 8 valence electrons will react with another atom.

Back

False.

Front

What are the 7 characteristics of life?

Back

Reproduction, growth/development, response to stimuli, homeostasis, metabolism, adaptation through evolution, and organization.

Front

What is the concentration of hydroxide ions in a solution where pH = 5?

Back

1 × 10⁻⁹ M.

Front

What type of bond gives water its unique properties?

Back

Hydrogen bond.

Front

Define a macromolecule.

Back

A large molecule composed of thousands of atoms, typically formed by polymerization of smaller subunits.

Front

What is the primary function of proteins in biological systems?

Back

Proteins serve as enzymes, structural components, signaling molecules, and transporters.

Front

What is the pH scale and what does it measure?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is the role of nucleic acids in cells?

Back

Nucleic acids, such as DNA and RNA, store and transmit genetic information.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.