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Biology (Grades 9–10) Midterm — Semester 1, Form B

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Science Grades 9–10 15 multiple choice + 1 written

Free printable Biology midterm (Grades 9–10): 15 multiple-choice questions plus 1 written response covering Biochemistry, Cells & Cell Transport, Photosynthesis & Cellular Respiration. Answer key included — customize it in the Midterm Maker.

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Biology (Grades 9–10) Midterm — Semester 1, Form B
Name: Date: Period:

Directions: Read each question carefully and choose the best answer. Answer the written response in complete sentences.

Covers: Biochemistry · Cells & Cell Transport · Photosynthesis & Cellular Respiration

Part 1: Multiple Choice

  1. How do enzymes speed up chemical reactions?
    1. A. By being used up as reactants
    2. B. By raising the temperature of the cell
    3. C. By lowering the activation energy
    4. D. By increasing the activation energy
  2. What are the monomers of nucleic acids such as DNA and RNA?
    1. A. Monosaccharides
    2. B. Glycerol molecules
    3. C. Amino acids
    4. D. Nucleotides
  3. Glucose belongs to which class of macromolecules?
    1. A. Proteins
    2. B. Lipids
    3. C. Nucleic acids
    4. D. Carbohydrates
  4. The basic structure of a cell membrane is a bilayer of which molecules?
    1. A. Phospholipids
    2. B. Nucleotides
    3. C. Carbohydrates
    4. D. Proteins
  5. When two monomers are joined by dehydration synthesis, which molecule is released?
    1. A. Oxygen
    2. B. Carbon dioxide
    3. C. Water
    4. D. Glucose
  6. Glucose moves into a cell through a carrier protein, down its gradient, without using ATP. What is this called?
    1. A. Exocytosis
    2. B. Active transport
    3. C. Facilitated diffusion
    4. D. Endocytosis
  7. What is a key difference between eukaryotic and prokaryotic cells?
    1. A. Eukaryotic cells lack ribosomes
    2. B. Prokaryotic cells lack DNA
    3. C. Prokaryotic cells have mitochondria
    4. D. Eukaryotic cells have a membrane-bound nucleus
  8. A plant cell placed in pure water swells but does not burst. Why?
    1. A. Water cannot enter plant cells
    2. B. Its cell wall resists the pressure
    3. C. It has no cell membrane
    4. D. Its chloroplasts absorb the water
  9. A cube-shaped cell has sides of 2 µm. What is its surface area-to-volume ratio?
    1. A. 1:3
    2. B. 6:1
    3. C. 2:1
    4. D. 3:1
  10. Diffusion is the movement of particles in which direction?
    1. A. From low concentration to high concentration
    2. B. Only into the nucleus
    3. C. From high concentration to low concentration
    4. D. Only when ATP is used
  11. Where does glycolysis take place?
    1. A. Inner mitochondrial membrane
    2. B. Chloroplast
    3. C. Cytoplasm
    4. D. Mitochondrial matrix
  12. The oxygen gas released during photosynthesis comes from which molecule?
    1. A. Water
    2. B. Chlorophyll
    3. C. Carbon dioxide
    4. D. Glucose
  13. Which statement correctly relates photosynthesis and cellular respiration?
    1. A. The products of one are the reactants of the other
    2. B. Both processes release oxygen
    3. C. Plants carry out photosynthesis but not respiration
    4. D. Animals carry out both processes
  14. Why do most plants appear green?
    1. A. Chlorophyll stores green light
    2. B. Chlorophyll produces green light
    3. C. Chlorophyll reflects green light
    4. D. Chlorophyll absorbs green light
  15. What is the final electron acceptor in the electron transport chain?
    1. A. Water
    2. B. Glucose
    3. C. Oxygen
    4. D. Carbon dioxide

Part 2: Written Response

  1. A slice of potato is placed in very salty water and another in distilled water. Predict what happens to each and explain using osmosis and tonicity.

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