CH 6: Macromolecule, Enzyme, and Test Notes

Question 1

What does the Iodine test look for?

Answer 1

Starches

Question 2

What does a negative test/original colour of the Iodine test solution?

Answer 2

yellow-orange

Question 3

What colour change does a positive Iodine test have?

Answer 3

Yellow → Brown or Black

Question 4

What does the Benedict test look for?

Answer 4

Reducing sugars

SUCROSE DOES NOT COUNT

Question 5

What does a negative test/original colour of the Benedict test solution.

Answer 5

Blue

light blue

Question 6

What colour change does a positive Benedict test have?

Answer 6

Blue → Red, Yellow, or Green

Question 7

What does the Biuret test look for?

Answer 7

Proteins

Question 8

What is a negative test/original colour of the Biuret test solution?

Answer 8

Blue

Question 9

What colour change does a positive Biuret test have?

Answer 9

Blue → Pink or Purple.

Question 10

What does the Transperence test look for?

Answer 10

Lipids

Question 11

What does a negitive test/original colour of the Transperence test solution.

Answer 11

Opaque

Question 12

What colour change does a positive Transperence test have?

Answer 12

Paper becomes translucent

Question 13

what parts do carbohydrates break down into?

Answer 13

polysaccharide → Disaccharide → Monosaccharide →

Question 14

What parts do proteins break down into?

Answer 14

Polypeptide → Peptide → Amino Acids

Question 15

What parts do Lipids/Fat break down into?

Answer 15

Fat → Glycerol and Fatty Acids

Question 16

What parts do Nucleic Acids break down into?

Answer 16

Nucleic Acids → Nucloptides → sugars phosphates and nitrogenous bases

Question 17

What is the process of removing water to join monomers together to form polymers is called

Answer 17

Dehydration synthesis.

Question 18

What is the process of adding water to a polymer to break it apart into its monomers?

Answer 18

Hydrolysis

Question 19

What step of formation of protein is Hydrogen bonding between close amino acids to form either a helix or a beta pleated sheet

Answer 19

Primary

Question 20

What step of formation of protein is more than one polypeptide chain bands together. Hemoglobin is an example of this. Now the polypeptide is called a protein.

Answer 20

Secondary

Question 21

What step of formation of protein is the sequence of amino acids in a peptide chain (polypeptide) combine

Answer 21

Tertiary

Question 22

What step of formation of protein is Interactions with more distant amino acids cause the structure to further fold in on itself. In particular hydrophobic interactions, disulphide bridges and ionic bond formations are the cause.

Answer 22

Quaternary

Question 23

What is the cell wall made out of in plants?

Answer 23

cellulose

Question 24

Is it easy or hard for heterotrophs to digest cellulose?

Answer 24

HARD

Question 25

What do organisms have in order to digest cellulose?

Answer 25

Adaptations like specialized stomach bacteria.

Question 26

What does HCl do?

Answer 26

Kills bacteria
Lowers pH
Activates pepsin

Question 27

What is the first energy source?

Answer 27

Carbohydrates

Question 28

What is used to build and repair tissues?

Answer 28

Protiens

Question 29

What is used for energy storage and insulation

Answer 29

Fats

Question 30

What elements are in each macromolecule

Answer 30

Protein: N, H, C, O
Nucleic acids: N,P,H,C,O
Starch: C,H,O
Lipid: C, H,O