Biochemistry

Question 1

Isotopes

Answer 1

Atoms of one element that vary in number of neutrons in nucleus

Question 2

Radioisotopes

Answer 2

Radioactive isotopes

Used in medical diagnosis, treatment, & research

Question 3

Half-life

Answer 3

The amount of time it takes for a radioisotope to decay half its mass

Question 4

Bond

Answer 4

Formed when 2 atomic nuclei attract the same electron(s) to achieve stability

Question 5

Ionic bonds

Answer 5

Form when electrons are transferred

Question 6

Covalent bonds

Answer 6

Form when atoms share electrons, resulting structure = molecule

Question 7

Hydrophobic

Answer 7

Water hating, nonpolar substances

Question 8

Hydrophilic

Answer 8

Water loving, polar substances

Question 9

Characteristics of water

Answer 9

1) high specific heat
2) high heat of vaporisation
3) high adhesion properties
4) universal solvent
5) exhibits string cohesion tension
6) ice floats because it’s less dense than water

Question 10

pH

Answer 10

A measure of acidity & alkalinity of a substance

Question 11

Buffers

Answer 11

Substances that resist change in pH

Question 12

Organic compounds

Answer 12

Compounds that contain carbon

4 classes; carbohydrates, proteins, lipids, nucleic acids

Question 13

Isomers

Answer 13

Compounds with same molecular formula but different structures

Question 14

Hydrolysis

Answer 14

The breakdown of a compound with the addition of water

Digestion