Molecules of Life

Question 1

basic important biochemicals are a set of – carbon-containing molecules called lipids, nucleic acids, amino acids, and carbohydrates

Answer 1

organic

Question 2

T/F: water is an organic molecule

Answer 2

false

Question 3

experiment recreated early earth atmosphere with nitrogen gas, methane, CO2, and water followed with electricity – was formed

Answer 3

amino acids

Question 4

amino acids = amine group + – + R + H

Answer 4

carboxylic group (COOH)

Question 5

– amine group

Answer 5

basic

Question 6

– carboxylic group

Answer 6

acidic

Question 7

– can be lost by the carboxylic acid and gained by the amine group

Answer 7

H+ ion

Question 8

electrically neutral substance that contains both positive and negative charges

Answer 8

zwitterion

Question 9

bonding of amino acids involves the loss of water via a – to give a protein

Answer 9

dehydration synthesis

Question 10

sequence of amino acids

Answer 10

primary structure

Question 11

primary structure can be an endless combination since there are – amino acids

Answer 11

20

Question 12

secondary structure are alpha helix or beta pleated sheet held by –

Answer 12

hydrogen bonds

Question 13

folding over of the secondary structure

Answer 13

tertiary structure

Question 14

– and hydrogen bonds hold the tertiary structure together

Answer 14

disulfide bridges (-S-S-)

Question 15

tertiary structure: if ions or nonpolar portions of the molecule are present, there is also the possibility of ionic or – forces

Answer 15

dispersion

Question 16

many tertiary structures put together

Answer 16

quaternary structure