Malverne Summer Regents Review 2

Base your answer to the following question on the diagram below which represents the fluid-mosaic model of a cell membrane. The arrow points to a component of the membrane that is best described as a ...

• sugar floating in lipids

• protein floating in lipids

• lipid floating in proteins

• lipid floating in sugars

The diagram below represents a portion of a cell membrane. Which structure may function in the recognition of chemical signals?

• A

• B

• C

• D

Carbohydrate molecules A and B come in contact with the cell membrane of the same cell. Molecule A passes through the membrane readily, but molecule B does not. It is most likely that molecule A is...

• a protein, and B is a lipid

• a polysaccharide, and B is a monosaccharide

• an amino acid, and B is a monosaccharide

• a monosaccharide, and B is a polysaccharide

Organisms combine simple molecules to form complex molecules by the process of

• ingestion

• synthesis

• regulation

• hydrolysis

Tags

NGSS.HS-LS1-6

Which class of molecules is responsible for speeding up chemical reactions?

• sugars

• fats

• genetic material

• enzymes

The graph below shows the results of an action of the enzyme catalase on a piece of meat. Evidence of enzyme activity is indicated by bubbles of oxygen. Which statement best summarizes the activity of catalase shown in the graph?

• The enzyme works better at 10°C than at 50°C.

• The enzyme works better at 5°C than at 65°C.

• The enzyme works better at 35°C than at either temperature extreme.

• The enzyme works at the same level in all environments.

Within a cell, where is the DNA chiefly found?

• cell wall

• plasma membrane

• ribosomes

• nucleus

Tags

NGSS.MS-LS1-2

The diagram below represents movement of a large molecule across a membrane. Which process is best represented in this diagram?

• active transport

• diffusion

• protein building

• gene manipulation

The diagram below represents a biochemical process. Which molecule is represented by X?

• DNA

• Starch

• Protein

• ATP

Tags

NGSS.HS-LS1-7

The energy used to obtain, transfer, and transport materials within an organism comes directly from ...

• ATP

• DNA

• sunlight

• starch

Tags

NGSS.HS-LS1-7