HMH 6th U6 L1-3 Test Review

Which of the following describes the cytoskeleton?

• A. a web of proteins that gives shape and support to the cell

• a membrane-bound organelle that contains genetic material

• the outer covering of a cell that separates it from the environment

• the structure that contains the information about how to make a cell’s proteins

Which cellular organelle is responsible for digestion and for the breakdown of damaged organelles inside an animal cell but not in a plant cell?

• Golgi complex

• lysosome

• ribosome

• rough endoplasmic reticulum

What is a protective layer that covers a cell’s surface and acts as a barrier between the inside of a cell and the cell’s environment.

• cell wall

• lysosome

• ribosome

• cell membrane

Organisms that are made up of just one cell are called

• unicellular

• lysosomes

• multicellular

• paramecium

Latoya adds sugar molecules to the cells she is studying. The cells transport the sugar to the organelles that will use it to make ATP. Latoya traces the movement of the sugar inside the cells. Based on this evidence, toward which organelle would you claim Latoya is likely to find the sugar molecules moving?

• chloroplast

• lysosome

• mitochondrion

• nucleus

Some dog foods contains corn and wheat that provide the dog with carbohydrates. Which claim explains why carbohydrates are important to cell processes?

• They are a source of energy.

• They make amino acids.

• They form cell membranes.

• They help chemical processes happen.

A cell must work to maintain a stable internal environment. It is also important for the environment around the cell to be stable. What reasoning explains what happens when the concentration of water inside a cell is lower than the concentration of water outside the cell?

• The cell loses nutrients.

• The cell splits and creates two new cells.

• The cell gains too many lipids and carbohydrates.

• The cell either loses water and dries up or gains too much water and bursts.

Animals produce enzymes that help chemical processes happen in the cells of their bodies. In which category of molecules do enzymes belong?

• lipids

• proteins

• nucleic acids

• carbohydrates

Which of these is the smallest?

• cells

• atoms

• molecules

• cell membrane

People often eat foods high in protein. Protein helps build muscle. Proteins are large molecules that are made up of smaller molecules. What are these smaller molecules called?

• amino acids

• phospholipids

• red blood cells

• nucleotides