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Ninth Grade (Grade 9) Biology Questions

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Grade 9 DNA, RNA, and Genetics
Which four nitrogenous bases are found in DNA?
  1. guanine, cytosine, adenine, thymine
  2. guanine, uracil, adenine, cytosine
  3. both a and b
  4. none of the above
Grade 9 Food Chains and Webs
Which organisms can be found at the first, or lowest, trophic level?
  1. herbivores
  2. carnivores
  3. heterotrophs
  4. autotrophs
Grade 9 Food Chains and Webs
Grade 9 Cell Structure and Function
Which cell structure has a cell's genetic material?
  1. organelle
  2. nucleus
  3. cell envelope
  4. cytoplasm
Grade 9 Cell Structure and Function
The primary job of the cell wall is to
  1. protect the cell and keep its shape.
  2. store DNA.
  3. direct and monitor a cell's activities.
  4. help the cell move.
Grade 9 Cell Structure and Function
Which organelle is not found in animal cells?
  1. mitochondrion
  2. ribosome
  3. chloroplast
  4. smooth endoplasmic reticulum
Grade 9 Cell Structure and Function
Which structure is made up of fats and proteins and surrounds a cell?
  1. plasma membrane
  2. cell wall
  3. cell envelope
  4. cytoplasm
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Cell Structure and Function
Grade 9 Communities, Populations, and Ecosystems
Every member of the same species that inhabits a region makes up a
  1. community.
  2. habitat.
  3. ecosystem.
  4. population.
Grade 9 Biochemical Pathways
Grade 9 Biotic and Abiotic
Which situation is a biotic factor operating within an ecosystem?
  1. the kind of climate in a given region
  2. carnivores that eat other animals
  3. the concentration of hydrogen gas in the air
  4. the rate of water flow in a body of water
Grade 9 Biochemical Pathways
Which are typically products of cellular respiration?
  1. carbon dioxide and water
  2. oxygen and carbon dioxide
  3. water and glucose
  4. glucose and oxygen
Grade 9 Cell Structure and Function
Why does osmosis cause an animal cell to burst when it is placed in a freshwater environment?
  1. Osmosis leads to water moving into the cell.
  2. Osmosis leads to water moving out of the cell.
  3. Osmosis leads to solutes moving into the cell.
  4. Osmosis leads to solutes moving out of the cell.
Grade 9 Biochemical Pathways
Which are typically products of photosynthesis?
  1. oxygen and carbon dioxide
  2. glucose and oxygen
  3. carbon dioxide and water
  4. water and glucose
Grade 9 Biochemical Pathways
Which correctly describes the purpose of photosynthesis?
  1. to release energy by decomposing glucose
  2. to store energy in the form of carbon dioxide
  3. to use sunlight energy to make sugars
  4. to create water for hydration
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