Cells and Cell Transport

Which statement best describes the structure of the plasma membrane?

• a protein bilayer with carbohydrates embedded

• a lipid bilayer with carbohydrates embedded

• a protein bilayer with lipids embedded

• a lipid bilayer with proteins embedded

Which statement describes the role of the nucleus in a cell?

• It converts the chemical energy in food into compounds useable by the cell.

• It produces proteins for structure following directions encoded in the DNA.

• It stores materials such as water, salts, proteins, and carbohydrates.

• It controls most cell processes and contains the hereditary information.

Tags

NGSS.MS-LS1-2

The heart is composed of cardiac muscle tissue whose cells have large numbers of mitochondria. How does having large numbers of mitochondria directly benefit the cells?

• It produces more proteins needed by the cells for structure and support.

• It allows water to diffuse across the cell membrane very quickly.

• It ensures the cells have the genetic information needed to make more cells.

• It provides all of the energy needed by the cells to keep the heart pumping blood.

Tags

NGSS.MS-LS1-2

A student observes cells from eukaryotic and prokaryotic organisms using a light microscope. The student sees different features in eukaryotic cells at a magnification of 40x, but it is difficult to see distinct features even at 400x when viewing the prokaryotic organisms.

What explains the difference in magnification required to observe prokaryotic cells?

• Prokaryotic cells are compactly arranged.

• Prokaryotic cells have thick cytoplasm.

• Prokaryotic cells are smaller than eukaryotic cells.

• Prokaryotic cells have membrane-bound organelles.

When viewing a specimen using a light microscope, what appears to happen to the specimen when the slide is moved to the right?

• The specimen appears to move to the right.

• The specimen appears to move to the left.

• The specimen appears to move toward the top.

• The specimen appears to move toward the bottom.

How is the total power magnification calculated?

• Add the eyepiece and the objective lens power.

• Multiply the eyepiece power times the objective lens power.

• Multiply the eyepiece power times the diaphragm power.

• Add the eyepiece power and the diaphragm power.

The diagram represents a plant cell.

Which statement is true about structure W?

• It is a vacuole that maintains internal water pressure.

• It is the nucleus which contains the cell's genetic material.

• It is a mitochondria that produces ATP for cell energy.

• It is the endoplasmic reticulum which produces proteins.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

What organelle transforms the energy in carbohydrates into molecules of ATP?

• chloroplast

• mitochondrion

• nucleus

• ribosome

The post office functions to process, package, and distribute. Which organelle has a similar function?

• chloroplast

• Golgi apparatus

• mitochondrion

• plasma membrane

Tags

NGSS.MS-LS1-2

Membrane bound organelles would be found in which type of cells?

• animal cells only

• eukaryotic cells only

• prokaryotic cells only

• plant cells only

Tags

NGSS.MS-LS1-2