Atomic Structure
The charge of a proton is
positive
A single water molecule is held together by which type of bond?
Polar covalent bond
The basic unit of life
cell
Nucleic acids are composed of
Nucleotides
What are two major areas of an atom?
The nucleus and the electron cloud
Water is considered the ______________ solvent?
A pH of 12-14 is considered
A strong base
unicellular or multicellular
What is the monomer of carbohydrates?
Monosaccharide
What is an ion?
an atom that loses or gains electrons
Capillary action is caused by which properties of water?
Cohesion and adhesion together
A pH of 6 would be considered
A weak acid
What is an example of a response to stimuli in a human?
overheating --> sweating
loud noise --> jump
Bones and muscle are made by which biomolecule?
Proteins
When would an atom be reactive
if it has less than 8 valence electrons in its outer shell
Water attaches to another water molecule through which type of bond?
Hydrogen bond
What type of solution keeps the pH of organisms constant by preventing changes in pH?
Buffer solutions
What is homeostasis?
regulation of an organism's internal environment to maintain conditions suitable for life
Can enzymes attach to any substrate or only to specific substrates?
Only specific substrates
What is an isotope?
Atoms that have the same number of protons but different numbers of neutrons
Which property of water causes surface tension?
Cohesion
What happens when you mix an acid with a base?
What are the characteristics of life? Name them.
1. Grow and Develop
2. Reproduction
3. Maintain Homeostasis
4. Made of one or more cells.
5. Displays organization
6. Requires Energy
7. Stimuli and response
8. Adaptations evolve over time
Which monomer is made up of a sugar, a phosphate, and a nitrogen base?
Nucleotide