Unit 2; The Cell (AP Biology)

What process explains how the red molecules left the dialysis bag?

• Osmosis

• Diffusion

• Facilitated diffusion

• Active transport

In hypotonic environments, paramecium utilize a pump vacuole to maintain homeostasis. Why is this vacuole necessary?

• The vacuole sucks in water lost to the environment

• The vacuole pumps out excess water coming into the cell.

• The vacuole pumps in salt to offset the hypotonic conditions

• The vacuole pumps out excess salt diffusing into the organism

Tags

NGSS.HS-LS1-3

If an individual had a mutation where they had excess aquaporins in their kidney cells, what would happen to this person?

• They would have difficulty producing proper volumes of urine.

• They would produce too much dilute urine.

• They would become dehydrated more easily.

• Their blood pressure would decrease.

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NGSS.HS-LS1-3

Which of these is not evidence used to support the endosymbiont theory for mitochondria and chloroplasts?

• The organelles contain free ribosomes and circular DNA

• The organelles produce their own energy.

• The organelles have a double membrane

• The organelles grow and reproduce somewhat independently

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NGSS.HS-LS4-1

If a cell loses water to its environment, what is true about the environment?

• It is hypotonic to the cell

• It is hypertonic to the cell

• It has a greater water potential than the cell

• It has a lower solute concentration than the cell

Tags

NGSS.HS-LS1-3

What is the role of lysosomes in phagocytosis?

• They form the vesicles needed for bulk transport

• The form the phospholipids needed to form the vesicles

• They digest the particles brought in by the vesicles

• They produce the proteins needed to form a vesicle

Eukaryotic and prokaryotic cells have which feature in common?

• A nucleus

• Mitochondria

• A plasma membrane

• Endoplasmic reticulum

If water is flowing into and out of an animal cell at equal rates, what type of environment is the cell in?

• Hypertonic

• Hypotonic

• Isotonic

• No enough information

Tags

NGSS.HS-LS1-3

If a person had a mutation that changed the shape of channel proteins, how would this affect cell transport?

• Nonpolar substances would no longer cross the cell membrane.

• Large polar substances would no longer be able to cross the cell membrane.

• The rate of diffusion for polar substances would increase

• The rate of bulk transport would decrease.

Tags

NGSS.HS-LS3-2

Why are aquaporins necessary for osmosis?

• Water is nonpolar and is repelled by the cell membrane

• Water is polar and is repelled by the cell membrane

• The hydrophilic lipid tails of the membrane repel water.

• Aquaporins are not involved in osmosis