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Twelfth Grade (Grade 12) Science Questions

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Grade 12 Cell Structure and Function
The endoplasmic reticulum functions to
  1. transport materials.
  2. destroy old cell parts.
  3. make ribosomes.
  4. make proteins and lipids.
Grade 12 Physics
What do magnetic field lines indicate?
  1. The direction of the magnetic force
  2. The temperature of the magnet
  3. The weight of the magnet
  4. The size of the magnet
Grade 12 Physics
Grade 12 Macromolecules
How is fermentation related to the production of bread?
  1. The absence of oxygen converts the sugar in the bread dough into oxygen, which is then removed from the bread.
  2. The ATP produced through fermentation is used by the bakers to knead the dough into the proper shapes.
  3. Yeast cells undergo alcoholic fermentation, which creates carbon dioxide that makes bread rise.
  4. Bacterial cells in the dough convert sugars through lactic acid fermentation into oxygen, allowing the dough to increase in height.
Grade 12 Skin, Skeleton, and Muscles
What are the three layers of the integumentary system from outer to inner?
  1. hypodermis, dermis, epidermis
  2. epidermis, dermis, hypodermis
  3. dermis, epidermis, hypodermis
  4. dermis, hypodermis, epidermis
Grade 12 Thermodynamics
Grade 12 Lab Practices and Tools
What do safety goggles protect?
  1. neck
  2. eyes
  3. forehead
  4. mouth and nose
Grade 12 Macromolecules
Catalase is an enzyme that speeds up which reaction?
  1. breakdown of hydrogen peroxide into oxygen and water
  2. breakdown of lipids in the gut
  3. synthesis of proteins from amino acids
  4. breakdown of lactose in the digestive system
Grade 12 Physics
What is the beat frequency equal to?
  1. The sum of the frequencies of the two waves
  2. The product of the frequencies of the two waves
  3. The average of the frequencies of the two waves
  4. The difference between the frequencies of the two waves
Grade 12 Physics
Which factor does not affect the magnitude of the Doppler shift for sound waves?
  1. The speed of sound in the medium
  2. The relative motion between the source and the observer
  3. The frequency of the source
  4. The observer's hearing ability
Grade 12 Physics
How does the speed of sound in air change with increasing temperature?
  1. Decreases
  2. Increases
  3. Remains constant
  4. May increase or decrease depending on other factors
Grade 12 Physics
What are regions of higher air pressure in a sound wave called?
  1. Rarefactions
  2. Compressions
  3. Nodes
  4. Antinodes
Grade 12 Physics
Grade 12 Periodic Table and Elements
Grade 12 Physics
What type of motion do S-waves exhibit?
  1. Compression and rarefaction
  2. Rolling elliptical motion
  3. Horizontal side-to-side motion
  4. Shear movement perpendicular to wave propagation
Grade 12 Physics
What happens to the size of circular orbits as you move deeper into the water?
  1. They become larger
  2. They remain the same
  3. They become smaller
  4. They become unpredictable
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