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Twelfth Grade (Grade 12) Biology Questions

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Grade 12 Human Reproduction
What system plays a vital role in the existence of the human species?
  1. Cardiovascular System
  2. Respiratory System
  3. Digestive System
  4. Reproductive System
Grade 12 Human Reproduction
Grade 12 Biochemical Pathways
Hydrolysis is a reaction in which
  1. water is added to a polymer and it breaks down.
  2. water is used to build polymers from monomers.
  3. proteins are made using water.
  4. water is taken away from a monomer.
Grade 12 Biochemical Pathways
Grade 12 Skin, Skeleton, and Muscles
Grade 12 Macromolecules
Drugs, Pathogens, Pesticides and Metabolic Imbalances are examples of                  .
  1. Enzyme Activators
  2. Enzyme Inhibitors
  3. Enzyme Reaction
  4. Enzyme Converters
Grade 12 Nervous and Endocrine Systems
The Brain is part of the                 system.
  1. Respiratory
  2. Reproductive
  3. Nervous
  4. Epithelium
Grade 12 Macromolecules
Pick a macromolecule from the list below.
  1. Oxygen
  2. Bacteria
  3. Protein
  4. Fruit Flies
Grade 12 DNA, RNA, and Genetics
DNA ligase plays an essential role in biotechnology because
  1. it helps foreign DNA to integrate into native DNA.
  2. it clears off alien DNA to keep the sample pure.
  3. it prevents the DNA from being digested.
  4. it is extremely thermostable and effective.
Grade 12 Macromolecules
Which type of biomolecule does not form polymers?
  1. lipids
  2. proteins
  3. carbohydrates
  4. nucleic acids
Grade 12 Respiration, Digestion, and Excretion
The main functions of the digestive system are
  1. ingestion and digestion
  2. propulsion and secretion
  3. absorption and elimination
  4. all of the above
Grade 12 Circulatory and Immune Systems
Grade 12 Macromolecules
An ATP molecule is made up of                                           .
  1. matrix, inner membrane, outer membrane
  2. NADH, NADPH, FADH
  3. adenine, phosphate groups and ribose
  4. proteins, carbohydrates, and nucleic acids
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 Anatomical Organization
The lymphatic system
  1. responds to internal and external changes by activating appropriate muscles and glands.
  2. picks up fluid leaked from blood vessels and returns it to the blood.
  3. secretes hormones that regulate processes such as growth, reproduction, and nutrients use.
  4. produces heat.
Grade 12 Cell Structure and Function
Osmosis is the movement of water across a membrane and
  1. Down a water potential gradient
  2. Up a hill
  3. Symbiotic
  4. All of the above
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