STC BIOL 2401 CH.3 Practice Question Quiz

The basic functional unit of living organisms is the:

• Element

• Cell

• Organism

• Organ

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NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which of the following is not part of the plasma membrane?

• Phospholipids

• Proteins

• Nucleic Acids

• Cholesterol

Phospholipids orient themselves in aqueous solutions such that:

• Polar heads point toward the center of the membrane

• Nonpolar tails orient toward the cytoplasm

• Polar heads and nonpolar tails alternate inward

• Heads face both interior & exterior; tails form center

A red blood cell placed in distilled water will:

• Lose water via osmosis

• Gain water via osmosis

• Gain water via diffusion

• Lose water via diffusion

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NGSS.HS-LS1-3

Which is not an example of simple diffusion?

• Oxygen entering blood

• Carbon dioxide leaving blood

• Glucose entering a cell with help

• Fat moving through membrane

Active transport:

• Moves materials into cell only

• Requires ATP

• Depends on kinetic energy

• Is used for lipid-soluble molecules

You would expect cells that expend a lot of energy to have many:

• Ribosomes

• Smooth ER

• Peroxisomes

• Mitochondria

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NGSS.HS-LS1-7

Which is NOT a function of the smooth ER?

• Lipid metabolism

• Breakdown of glycogen

• Steroid hormone synthesis

• Protein synthesis with ribosomes

Which organelle detoxifies harmful substances?

• Vesicles

• Vacuoles

• Peroxisomes

• Inclusions

Cells storing large amounts of chemicals keep them in:

• Snares

• Docking sacs

• Fusion sacs

• Vesicles