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Twelfth Grade (Grade 12) Biology Questions

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Grade 12 Respiration, Digestion, and Excretion
The digestive system is a group of organs that work together to                                       .
  1. take in oxygen and give carbon dioxide
  2. convert food into energy
  3. give the body shape
  4. all of the above
Grade 12 DNA, RNA, and Genetics
The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA                              .
  1. contains one less oxygen atom
  2. is a six-carbon sugar
  3. is helical
  4. is a six-ring carbon
Grade 12 Cell Structure and Function
Which active transport is used for secretion and to help things exit the cell?
  1. exocytosis
  2. endocytosis
  3. pinocytosis
  4. phagocytosis
Grade 12 Skin, Skeleton, and Muscles
Which body system provides a system of levers to help the body move?
  1. skeletal system
  2. muscular system
  3. nervous system
  4. circulatory system
Grade 12 Macromolecules
Carbohydrates include
  1. fructose.
  2. starch.
  3. polysaccharides.
  4. all of the above
Grade 12 Biochemical Pathways
Which mineral is a component of both proteins and nucleic acids?
  1. magnesium
  2. iron
  3. potassium
  4. nitrogen
Grade 12 Nervous and Endocrine Systems
Which system is responsible for the secretion of hormones?
  1. endocrine
  2. integumentary
  3. circulatory
  4. digestive
Grade 12 Skin, Skeleton, and Muscles
This system contains the largest organ in the body.
  1. cardiovascular
  2. reproductive
  3. digestive
  4. integumentary
Grade 12 Biochemical Pathways
How do enzymes make reactions go faster?
  1. They lower activation energy.
  2. They raise the activation energy.
  3. They supply extra reactants.
  4. They limit the amount of products in the reaction.
Grade 12 DNA, RNA, and Genetics
DNA ligase plays an essential role in biotechnology because it                                               .
  1. helps foreign DNA to integrate into native DNA
  2. clears off alien DNA to keep the sample pure
  3. prevents the DNA from being digested
  4. is extremely thermostable and effective
Grade 12 Taxonomy
What is the definition of taxonomy?
  1. science of classifying and naming organisms
  2. grouping organisms according to structural and evolutionary similarities
  3. history of the evolution of organisms (tree diagram)
  4. method of biologically naming organisms created by Carl Linneaus
Grade 12 Respiration, Digestion, and Excretion
What does the respiratory system do?
  1. pumps blood throughout the body
  2. takes oxygen in and exchanges it for carbon dioxide
  3. gives the body nutrients
  4. makes babies
Grade 12 Skin, Skeleton, and Muscles
What connects muscle to bones?
  1. cartilage
  2. ligaments
  3. joints
  4. tendons
Grade 12 Macromolecules
Which organic molecule is represented by the structural formula below?
Structural Formula - Carbon Chain Glucose
  1. sucrose
  2. fatty acid
  3. glucose
  4. starch
Grade 12 Cell Structure and Function
Which of the following is NOT a component of the cell theory?
  1. All living things are composed of cells.
  2. All cells come from preexisting cells.
  3. Cells carry genetic information in the form of DNA.
  4. All living things contain a mitochondria.
  5. Cooperation among cells allow for complex functioning in living things.
Grade 12 Biochemical Pathways
Photosynthesis occurs in the chloroplasts of                .
  1. ants
  2. plants
  3. grasshoppers
  4. chickens
Grade 12 Nervous and Endocrine Systems
The                 system is the most highly developed organ system in the human body.
  1. respiratory
  2. nervous
  3. muscular
  4. skeletal
Grade 12 Cell Structure and Function
This organelle has no ribosomes function and has lipid synthesis.
  1. Endoplasmic Reticulum
  2. Rough Endoplasmic Reticulum
  3. Smooth Endoplasmic Reticulum
  4. None of the above
Grade 12 Anatomical Organization
The transverse plane divides the body                                         .
  1. diagonally
  2. horizontally
  3. vertically, into front and back portions
  4. vertically, into left and right portions
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