i need help on this qusestions for my homework it is important so please help me

Question

i need help on this qusestions for my homework it is important so please help me with the correct answers please  

Question 12

Lizards store fat in their ___________ and mammals store fat ______________.

Question 13

A phospholipid molecule has how many fatty acid chains? Write a single number as the answer as a number. Do not use letters.

Question 14

Which "side" of a phospholipid will face the aqueous environment inside and outside of the cell?

Question 15

Fatty acid tails are

Question 16

Steroids can be recognized because they have

Question 17

Which of the follow is NOT a major role of proteins?

Question 18

Hair is made of keratin and keratin is a protein.

Question 19

In the molecule shown below, the functional group to the left of the letter A is?

Question 20

The bond shown at C is called a?

Question 21

The primary structure of a protein can best be described as?

Explanation / Answer

12. Lizards store fat in tails and mammals store fat subcutaneously

13. Was phospholipid molecule has a glycerol molecule which is three carbon molecule. One of which is substituted with a phosphate and the two other carbons have two fatty acid chains. Thus a two fatty acid chains are present in a phospholipid molecule.

14. The phosphate group of the molecule is the polar part of the molecule and thus is the hydrophilic part which face aqueous environment.

15. Fatty acid tails are hydrophobic.

16. 4 fused carbon joined together

17. Proteins are mostly not involved as energy storage Molecule in animals

18. true.

19. The functional group on the left of A is NH2 which is an amino group

20 O=C-NH2 is a peptide bond

21. The primary structure can be best described by the sequence of amino acids in the polypeptide chain

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