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Twelfth Grade (Grade 12) Science Questions

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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
Which of the following is NOT a fundamental state of matter?
  1. Solids
  2. Liquids
  3. Gases
  4. Plasma
Grade 12 Zoology
Which of the following is an example of a macrofauna?
  1. marine amoeba
  2. pathogenic viroid
  3. crab megalope
  4. saltwater paramecium
Grade 12 Skin, Skeleton, and Muscles
Which is included in the integumentary system?
  1. hair
  2. nails
  3. skin
  4. all of the above
Grade 12 Biomes
What is the place where freshwater and saltwater mix in the ocean biome?
  1. chaparral
  2. estuary
  3. coastal runoff
  4. benthic community
Grade 12 Chemistry
A mole of table sugar and a mole of Vitamin C have equal
  1. masses.
  2. volumes.
  3. numbers of atoms.
  4. numbers of molecules.
Grade 12 Anatomical Organization
Which order of the level of organization of life is correct?
  1. molecule, cell, organism, macromolecule, organelle, tissue, organ
  2. organ, tissue, organism, molecule, cell, organ system
  3. atom, molecule, macromolecule, organelle, cell, tissue
  4. cell, organ, tissue, organism, molecule, atom
Grade 12 Macromolecules
Which of these describes a substrate?
  1. part of the enzyme that substrate molecules fit into
  2. molecule that the enzyme works on
  3. what the enzyme helps produce from the reaction
Grade 12 Bonds and Mixing
The sugar used in a crystal-making experiment is a(n)                .
  1. solute
  2. solvent
  3. supersaturate
  4. atom
Grade 12 Nervous and Endocrine Systems
The main general purpose of negative feedback is to
  1. control all body system tissues.
  2. maintain homeostasis.
  3. keep the body's sugar high.
  4. regulate excretion.
Grade 12 Macromolecules
A polysaccharide that can be made in some animal cells is
  1. starch.
  2. pectin.
  3. glycogen.
  4. cellulose.
Grade 12 Chemistry
What is the mass of 8.70 moles of carbon?
  1. 12.0 g
  2. 104 g
  3. 244 g
  4. 0.988 g
Grade 12 Circulatory and Immune Systems
Where do the veins and arteries come together?
  1. capillaries
  2. heart
  3. ventricles
  4. aorta
Grade 12 DNA, RNA, and Genetics
Alleles for the A and B blood cell antigens are codominant. The condition where no antigens are present on the blood cells (type O blood) is a recessive trait. Which set of parents will most likely produce a child with type O blood?
  1. one parent with type AB blood, and the other parent with type A blood
  2. one parent with type AB blood and the other parent with type O blood
  3. one parent with heterozygous type A blood, and the other parent with type O blood
  4. one parent with homozygous type A blood, and the other parent with homozygous type B blood
Grade 12 Macromolecules
Which type of biomolecule does not form polymers?
  1. lipids
  2. proteins
  3. carbohydrates
  4. nucleic acids
Grade 12 Macromolecules
What speeds up chemical reactions?
  1. enzymes
  2. pH
  3. biochemical reactions
  4. activation energy
Grade 12 Environmental Science
Which is a fossil fuel?
  1. Charcoal
  2. Biodiesel
  3. Crude Oil
  4. Iron
Grade 12 Nervous and Endocrine Systems
The sympathetic nervous system is responsible for
  1. the "fight or flight" response.
  2. control of organs while at rest.
  3. motor control.
  4. intelligent thought.
  5. vision.
Grade 12 Acids and Bases
In volumetric analysis, the auxiliary reagent is known as the                  .
  1. indicator
  2. standard solution
  3. titrant
  4. titrate
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