review for biochemtest

Question 1

parts of an atom

Answer 1

protons,neutrons,and electrons.

Question 2

radioactive isotopes

Answer 2

1. unstable nuclei that breaks down releasing energy over time.

Question 3

what are chemical compounds

Answer 3

when elements combine to form different substances

made of two or more atoms.

Question 4

what are the 2 main types of bonding

Answer 4

1. chemical and covalent.

Question 5

what are the 2 types of chemical reactions.

Answer 5

synthesis and decomposition.

Question 6

carbohydrates

Answer 6

it breaks down fats make short term energy.

Question 7

lipids

Answer 7

stores fat.

Question 8

proteins

Answer 8

fairly big molecules that are composed of one or more amino acids. they are also enzymes that can speed up reactions.

Question 9

nucleic acids

Answer 9

DNA and RNA that have one or 2 chains of repeating units called nucleotides.

Question 10

organic compounds

Answer 10

carbon compounds.

Question 11

ions

Answer 11

A single or group of atoms that carry a positive or negative charge.

Question 12

isotopes

Answer 12

elements with a different number of neutrons than original state.

Question 13

chemical bonds

Answer 13

the process of gaining losing or sharing electrons to make
2 or more different atoms combine to form a stable compound.

Question 14

homeostasis

Answer 14

an organism maintaining internal stability

Question 15

solution

Answer 15

a mix of 2 or more substances

Question 16

acid

Answer 16

a solution that reacts with metals or objects

Question 17

base

Answer 17

a chemical that donates electrons and ions

Question 18

ph scale

Answer 18

measure of acidity on an object or in a liquid substance

Question 19

metabolism

Answer 19

part of the stomach that breaks down food

Question 20

chemical reactions

Answer 20

a chemical change that occurs when 2 or more substances form to combine a new substance

Question 21

enzyme

Answer 21

proteins that speed up chemical reactions

Question 22

elements

Answer 22

a substance with the same number of protons

Question 23

compounds

Answer 23

when two elements bond together

Question 24

atomic mass

Answer 24

the mass of an atom

Question 25

atomic number

Answer 25

the number of protons in the nucleus of an atom,