U1: Test-Cells & Their Parts (2021)

skin:human body as _______:cell

• cytoplasm

• cell membrane

• plasmid

• wall

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

Mr. Brown's class looked at their cheek cells using microscopes. They stained the cells before using the microscopes, and were able to see the _________, which are the dark blue spot in the center of each cell.

• membrane

• cytoplasm

• cell wall

• nucleus

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The _____ is the lowest level of life's structural hierarchy.

• cell
• ecosystem
• organ
• species

Tags

NGSS.MS-LS1-1

The cell structures in the table are found in a cell that has a specific function. What explanation describes a function that the cell would NOT be able to do?

• The cell cannot recycle old cell parts and other materials.

• The cell cannot take in and remove substances and water.

• The cell cannot create its own food and convert it into energy.

• The cell cannot reproduce.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-7

Which answer BEST describes the primary function of the cell membrane?

• The cell membrane acts as a warehouse where incoming materials such as glucose are broken down and processed into smaller, simpler molecules. These smaller molecules are then distributed to organelles inside the cell, where they are used to provide nutrients and energy.

• The cell membrane acts as a gatekeeper that controls which substances can enter and leave the cell. It allows necessary materials such as oxygen and glucose to enter, which waste substances are removed.

• The cell membrane acts as a supportive frame that gives the cell a rigid structure and protects it from inward and outward pressures. If the cell takes in a large amount of water, the membrane keeps it from bursting. If the cell loses water and starts to shrink, the membrane keeps it from collapsing.

• The cell membrane acts as a defense system against foreign particles such as bacteria. When the membrane encounters a foreign object, it wraps itself around the object, destroys it, then the remains are digested or passed out through the membrane.

Tags

NGSS.MS-LS1-2

Cells can be compared to cities, with different organelles carrying out necessary functions such as construction, communication, and energy production. Which category most accurately describes the work of lysosomes, and why?

• Engineering and manufacturing, because lysosomes bring together amino acids in a specific sequence to assemble proteins.
• Safety and healthcare, becasue lysosomes destroy invading particles such as bacteria and repair damage caused by foreign bodies.
• Waste management and recycling, becasue lysosomes break down foreigh particles and old cellular waste and remove or reuse it.
• Storage and transportation, becasue lysosomes contain water and nutrients and deliver them to parts of the cell where they are needed.

Tags

NGSS.MS-LS1-2

What is the function of the mitochondria in plant and animal cells?

• It received and removes wastes.

• It is the command center of the cell.

• It provides a barrier between the inside and the outside of the cell.

• It is the location of cellular respiration and produces ATP.

Tags

NGSS.MS-LS1-2

The image shows a cross section of a plant cell. On his science test, Lucas identifies #5 as the cell membrane. Is Lucas correct? Why or why not?

• Lucas is incorrect because #5 is the chloroplast of the plant cell, which makes the food for the plant cell.

• Lucas is incorrect because #5 is the cell wall, which surrounds the outside of the plant cell membrane.

• Lucas is correct because the cell membrane surrounds the cell wall of the plant cell.

• Lucas is incorrect because #5 is the nucleus of the plant cell, and controls what enters or exits the cell.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Your stomach is the internal organ in which the major part of digestion of food occurs. It contains digestive enzymes that work to break down food, turning it into usuable nutrients and waste. Which organelle is most comparable to the stomach because it contains digestive enzymes to break down cellular material and waste?

• Vacuole
• Lysosome
• Mitochondria
• Nucleus

Tags

NGSS.MS-LS1-2

Plant and animal cells have a lot in common. Compare and contrast the two cells. Select the features that you find in BOTH types of cells.

• cell membrane, nucleus, cytoplasm

• cell membrane, chloroplast, nucleus

• cell wall, cell membrane, nucleus

• cell wall, cell membrane, chloroplasts

Tags

NGSS.MS-LS1-2