science def

Question 1

element

Answer 1

any substance that cannot be broken down into simpler substances

Question 2

compound

Answer 2

the chemical combination of two or more elements

Question 3

carbohydrate

Answer 3

an energy-rich organic compound such as sugar

Question 4

proteins

Answer 4

large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and, in some cases , sulfur

Question 5

amino acids

Answer 5

small molecules that make up proteins

Question 6

enzyme

Answer 6

type of protein that speeds up chemical reactions in living things

Question 7

lipid

Answer 7

an energy-rich organic compound such as fat

Question 8

nucleic acids

Answer 8

very large organic molecules made of carbon, oxygen, hydrogen, nitrogen, and phosphorus

Question 9

DNA

Answer 9

type of nucleic acid that passes from parents to offspring and directs all the cells functions

Question 10

RNA

Answer 10

type of nucleic acid that plays an important role in the production of proteins

Question 11

atom

Answer 11

the smallest unit of an element

Question 12

molecule

Answer 12

the smallest unit of most compounds

Question 13

organic compound

Answer 13

a compound that contains carbon