Macromolecule Review

Waxes, oils, and fats are examples of:

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

Waxes, oils, and fats are all types of lipids, which are organic compounds that are hydrophobic and play key roles in energy storage and cellular structure. Therefore, the correct answer is lipids.

DNA and RNA are examples of:

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

DNA and RNA are both types of nucleic acids, which are essential biomolecules that store and transmit genetic information. They are distinct from lipids, proteins, and carbohydrates.

Which substance is found in the cell membrane as a bilayer?

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

Lipids are the primary components of the cell membrane, forming a bilayer that provides structure and regulates the movement of substances in and out of the cell. Proteins, nucleic acids, and carbohydrates are also present but do not form the bilayer.

Monosaccharides are monomers of:

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

Monosaccharides are the simplest form of carbohydrates and serve as their building blocks. They combine to form larger carbohydrate molecules, making carbohydrates the correct answer.

The element ____________ is the backbone in all organic compounds.

• iron

• carbon

• nitrogen

• hydrogen

• oxygen

Answer explanation

The element carbon is essential to all organic compounds, as it forms the backbone of these molecules. While hydrogen, oxygen, nitrogen, and iron are also important, only carbon is universally present in all organic compounds.

Tags

NGSS.HS-LS1-6

Lipids are made of...

• CHO

• CHON

• CHONP

• CHONS

Answer explanation

Lipids are primarily composed of carbon (C), hydrogen (H), and oxygen (O), which is represented by the formula CHO. This distinguishes them from proteins and nucleic acids, which contain nitrogen (N) and phosphorus (P).

Carbohydrates are made of...

• CHO

• CHON

• CHONP

• CHONS

Answer explanation

Carbohydrates are organic compounds made up of carbon (C), hydrogen (H), and oxygen (O), represented by the formula CHO. The other options include additional elements not found in carbohydrates.

Tags

NGSS.HS-LS1-6

Which macromolecule includes sugars and starches?

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

Carbohydrates are macromolecules that include sugars and starches. They are essential for energy storage and supply in living organisms, distinguishing them from lipids, proteins, and nucleic acids.

Which macromolecule is used for short-term (quick) energy?

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

Carbohydrates are the primary source of quick energy for the body. They are easily broken down into glucose, which provides immediate energy, unlike lipids and proteins that serve other functions.

What type of macromolecules are enzymes?

• Lipids

• Proteins

• Nucleic Acids

• Carbohydrates

Answer explanation

Enzymes are biological catalysts that speed up chemical reactions in the body. They are primarily made of proteins, which are macromolecules composed of amino acids. Therefore, the correct answer is proteins.

Tags

NGSS.HS-LS1-1