Cells Unit Exam

Plant cells perform photosynthesis, which occurs in the _______.

• A. chloroplast.

• B. cytoplasm.

• C. mitochondria.

• D. nucleus.

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-5

What is the primary function of a vacuole in a cell?

• enzyme production

• protein synthesis

• storage

• reproduction

Tags

NGSS.MS-LS1-2

This diagram shows a red blood cell in a beaker that contains a solution with higher salt concentration than that inside the red blood cell. What will happen to the red blood cell in this environment?

• The size of the red blood cell will remain constant.

• The red blood cell will swell at first and then shrink.

• The red blood cell will swell from absorbing salt molecules.

• The red blood cell will shrink from losing water molecules.

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NGSS.HS-LS1-3

During which phase of the cell cycle does most cell growth occur?

• cytokinesis

• interphase

• prophase

• mitosis

The chemical colchicine disrupts cell division. Which cell process would most likely stop if colchicine were added to a culture of human liver cells?

• mitosis

• meiosis

• endocytosis

• active transport

Tags

NGSS.HS-LS1-4

A contractile vacuole helps protists eliminate excess liquid. This is a "pumping" process which reduces pressure inside the cell and prevents the cell from bursting. This process requires energy. Which organelle in the cell is the source of energy for the cell?

• DNA

• golgi body

• mitochondria

• ribosomes

Tags

NGSS.HS-LS2-5

During the cell cycle, proteins called cyclins bind to enzymes that send signals for the cell to progress through stages of cell replication. At the end of this cycle, the cyclins degrade to prevent further signaling for the cell to divide. Uncontrolled production of cyclins will most likely result in-

• the formation of cancer cells

• healthy cells

• the transfer of cyclins

• an increase in mitochondria within the cell

Tags

NGSS.HS-LS1-4

NGSS.HS-LS3-2

What would most likely be produced when a cell with eight chromosomes undergoes mitosis?

• Two cells with four chromosomes each

• Two cells with eight chromosomes each

• Four cells with four chromosomes each

• Four cells with eight chromosomes each

Tags

NGSS.HS-LS1-4

Which statement describes the process of osmosis in an animal cell?

• Sugar molecules move across the plasma membrane until the cell has enough energy to grow in size and divide.

• Water molecules move across the plasma membrane until solute concentrations are equal on both sides of the membrane.

• Ions move across the plasma membrane until the inside of the cell has a higher concentration of positive charges.

• Enzymes move across the plasma membrane until the cell has completed metabolism.

Students construct a graphic organizer to illustrate the different levels of biological organization. Which term does the letter X represent in the graphic organizer?

• molecule

• tissue

• ecosystem

• atom

Tags

NGSS.HS-LS1-2