Which type of molecule makes up the double layer of a cell membrane?

• carbohydrate

• lipid

• nucleic acid

• protein

In cells, __________ are proteins that are needed to lower the amount of energy required to start chemical reactions.

• acids

• enzymes

• products

• substrates

Tags

NGSS.HS-PS1-5

The sequence of ________________ in a DNA molecule determines the protein that will be produced.

• lipids

• nucleotides

• proteins

• sugars

Tags

NGSS.HS-LS1-1

Which compound is a reusable, complex protein that speeds up chemical reactions?

• a sugar

• a lipid

• an enzyme

• starch

Tags

NGSS.MS-LS1-7

In the lock-and-key model of enzyme action, the ___________ fits into the __________ of the enzyme.

• product; substrate

• active site; product

• substrate; active site

• active site; substrate

Proteins are made of ________________________, and the sequence of these determine how the protein will fold up and take shape, which ultimately determines it's function.

• amino acids

• lipids

• monosaccharides

• nucleotides

Tags

NGSS.HS-LS1-1

Identify which biomolecule is "A" from the above table.

• Lipid

• Protein

• Carbohydrate

• Nucleic Acid

Identify which biomolecule is "D" from the above table.

• Lipid

• Protein

• Carbohydrate

• Nucleic Acid

A person starts to eat a hamburger. As she takes a bite and chews, an enzyme called salivary lipase helps to begin the process of fat digestion. Which of these is the BEST description of the role of enzymes during digestion?

• Enzymes are acids that physically break down food molecules.

• Enzymes moisten food to help teeth in the mechanical process of grinding and chewing.

• Enzymes are proteins that speed up the process of chemically breaking down food molecules.

• Enzymes are cells that secrete saliva and other necessary substances needed for digestion.

Lipids are important to living things for all of the following reasons, EXCEPT that they are

• needed to form cell membranes.

• chained together to form proteins.

• used for insulation in Arctic animals.

• used for long-term energy storage in hibernating animals.

Tags

NGSS.MS-LS2-3