Plant cells perform photosynthesis, which occurs in the_______.

• A. chloroplast.

• B. cytoplasm.

• C. mitochondria.

• D. nucleus.

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

• A. enzyme production

• B. protein synthesis

• C. storage

• D. reproduction

Which of the following macromolecules is NOT found in the cell membrane?

• A. carbohydrates

• B. lipids

• C. proteins

• D. nucleic acids

Which of the following molecules would require energy to pass through the cell membrane?

• A. water

• B. glucose (C6H12O6)

• C. methane gas

• D. oxygen gas

A red blood cell in a beaker 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?

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

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

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

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

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

• A. cytokinesis

• B. interphase

• C. prophase

• D. 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?

• A. mitosis

• B. meiosis

• C. endocytosis

• D. active transport

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?

• A. DNA

• B. golgi body

• C. mitochondria

• D. ribosomes

During the cell cycle, proteins called cyclins send signals to the cell to continue through the cell cycle from one phase to the next. 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-

• A. the formation of cancer cells

• B. healthy cells

• C. the transfer of cyclins

• D. an increase in mitochondria within the cell

Which of the following is NOT a eukaryotic organism?

• A. Human

• B. Dog

• C. Plant

• D. Bacteria