Question

8. A macromolecule made up of multiple monomers of amino acids is called a:

a. Carbohydrate

b. Protein

c. Nucleic acid

d. Lipid

9. The majority of carbohydrates have a carbon to hydrogen to oxygen ratio of

a: 1.1 .4

b. 2.6 .2

c. 1: 411

d. 112: 1

10. The part of the cell envelope that is a phospholipid bilayer with embedded proteins is called:

a. The plasma membrane

b. The cell wall

o. Cellulose,

d. None of the above

11. Which of the three kinds of Lipid molecules is characterized by their arrangement of interlocking rings of carbon:

a. Phospholipids.

b. Steroids

E Essential fatty acids

d. Glycerol

12: The three main types of lipids are:

a. True fats, phospholipids and nucleotides

b. True fats, phospholipids and proteins

c. True fats, phospholipids and steroids

d. True fats, phospholipids and starch

13. Molecules that have the same empirical formula but different structural formula are called?

a. Isotopes

b. Isomers

c. Ionic

d. Covalent

14. Which of the four macromolecules is considered responsible for carrying genetic information:

a. Carbohydrates.

b. Proteins

c. Nucleic acids

d. Lipids

15. A group of atoms that form the chemically reactive part of an organic molecule are called?

a. Functional group

b. Monomer

C Isotope

d. All of the above.

Answer 1

8) amino acids are linked to each other via peptide bonds to form proteins, nucleotides are linked to each other via phosphodiester linkage to form nucleic acid.

Lipids have fatty acids attached to the glycerol.

so the answer is b) protein

9) majority of the carbodydrates have carbon to oxygen to hydrogen ratio 1:2:1 for example in glucose C₆H₁₂O₆, the ratio is

C:H2:O=1:2:1

so the answer is d) 1:2:1

10) the cell envelope with proteins embedded in the phospholipid bilayer is plasma membrane.

cell wall made of cellulose is found in plants.

animal cells lack cell wall.

some Proteins and lipids in the plasma membrane contains carbohydrates attached to it.

a) plasma membrane.

11) glycerol, and fatty acids are linear chains.

lipids have fatty acids attached to the OH group of glycerol.

sterid have three six carbon rings and one five carbon ring, so the answer is b) steroids